Spectacle lenses and computer-implemented methods for identifying spectacle lenses

Abstract

A spectacle lens comprising at least: - a first region, the first region including a plurality of micro-optical elements arranged to cover at least 30 percent of the total area of ​​the first region; and - a second region, the second region including a plurality of micro-optical elements arranged to cover at least 30 percent of the total area of ​​the second region, wherein the first region is different from the second region, and the micro-optical elements of the first and second regions are arranged such that, for a predetermined spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region by less than 40%.

Description

[Technical Field]

[0001] The present invention relates to an eyeglass lens for improving the visual performance of a wearer, the eyeglass lens comprising micro-optical elements. The present invention also relates to a computer-implemented method for specifying an eyeglass lens, the eyeglass lens comprising micro-optical elements. [Background technology]

[0002] Myopia is characterized by the fact that the eye focuses distant objects in front of the retina.In other words, the length of myopic eye is not suitable for clear vision.Myopia has both genetic and environmental origins.In the latter case, myopia is caused by, for example, the increase in close-up work and the increase in the use of digital devices such as computer and smartphone digital screens, as well as the decrease in outdoor activities.

[0003] Many solutions exist that aim to slow the progression of myopia. For example, it is known to manage myopia progression and / or reduce discomfort induced by myopia and / or myopia suppression by using lenses that are positioned to be worn in front of one of the subject's eyes and have micro-optical elements that include optical features adapted to provide myopia progression suppression functionality. These solutions, while functional, may alter the subject's vision. Summary of the Invention [Problem to be solved by the invention]

[0004] In this regard, one object of the present invention is to provide spectacle lenses that improve the wearer's visual performance by achieving an appropriate trade-off between vision correction, visual acuity and discomfort and slowing of myopia progression. [Means for solving the problem]

[0005] The above object is achieved according to the present invention by at least - a first region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the first region; a second region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the second region; and This is achieved by providing a spectacle lens comprising: a first region different from a second region; and micro-optical elements in the first and second regions arranged such that, for a predetermined spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region by less than 40%.

[0006] Due to this feature of the spectacle lens, the spectacle lens represents an appropriate trade-off between visual acuity and discomfort and slowing down the progression of myopia.

[0007] Typically, by defining at least two regions in spectacle lens that have the same shape but have different orientations or positions, it is possible to consider the change of gaze direction.Therefore, when the value (or modulation rate) of each modulation transfer function of these two regions is approximately the same, this means that spectacle lens provides approximately stable visual quality for different gaze directions that are determined by the positions of at least two regions.

[0008] In addition, by defining at least two areas of different sizes, it is possible to take into account the variations in the size of the normal pupil of a wearer. Therefore, if the values ​​of the modulation transfer functions (or modulation rates) of each of these two areas are approximately the same, this means that the spectacle lens provides an approximately stable visual quality in the brightness environments that the wearer may encounter in real life (for example, indoor or outdoor activities).

[0009] According to one embodiment, the predetermined spatial frequency range is a first predetermined spatial frequency range, and the micro-optical elements of the first region and the micro-optical elements of the second region are arranged such that for the second predetermined spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region by more than 10%.

[0010] In one example of this embodiment, the second predetermined spatial frequency range differs from the first predetermined spatial frequency range by at least 5 cycles per degree.

[0011] In another example of this embodiment, - the first spatial frequency range is comprised between 1 and 5 cycles / degree and the second spatial frequency range is comprised between 15 and 20 cycles / degree, or the second spatial frequency range is comprised between 1 and 5 cycles / degree, and the first spatial frequency range is comprised between 15 and 20 cycles / degree.

[0012] According to one embodiment, the projection of the first area onto a plane perpendicular to the optical axis of the spectacle lens presents a circular contour and has a diameter comprised between 2 and 20 millimeters.

[0013] According to another embodiment, the projection of the second area onto a plane perpendicular to the optical axis of the spectacle lens presents a circular contour and has a diameter comprised between 2 and 20 millimeters.

[0014] According to an embodiment, the projection of the first area onto a plane perpendicular to the optical axis of the spectacle lens and the projection of the second area onto said plane have different shapes or different sizes.

[0015] According to an embodiment, the projection of the first area onto a plane perpendicular to the optical axis of the spectacle lens and the projection of the second area onto said plane are concentric.

[0016] According to one embodiment, the geometric center of the projection of the first area onto a plane perpendicular to the optical axis of the spectacle lens is spaced at least 0.5 millimeters from the geometric center of the projection of the second area onto said plane.

[0017] According to one embodiment, a spectacle lens includes a third region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the third region, the third region having an outer contour indicating a geometric center, the center of the third region being spaced less than 0.5 millimeters from the center of the first region, and the micro-optical elements of the first and third regions being arranged such that the first and third regions have respective modulation transfer functions that provide substantially the same respective modulation ratios with a tolerance of less than 20 percent for each frequency in a first predetermined spatial frequency range.

[0018] In other words, this means that the modulation rate of the third region differs from the modulation rate of the first region by less than 20 percent.

[0019] According to one embodiment, the modulation percentages of each of the first and third regions are approximately the same with a tolerance of less than 10 percent.

[0020] In other words, this means that the modulation rate of the third region differs from the modulation rate of the first region by less than 10 percent.

[0021] According to an embodiment, the first region and the third region are concentric.

[0022] According to an embodiment, the spatial frequency range in which the modulation rate of each modulation transfer function is considered is comprised between 1 and 5 cycles / degree or between 15 and 20 cycles / degree.

[0023] According to an embodiment, the density of the micro-optical elements in the first region differs from the density of the micro-optical elements in the second region by less than 5%; and / or the average refractive power of at least one of the micro-optical elements of the first region is different from the average refractive power of at least one of the micro-optical elements of the second region, and / or - at least one optical function of the micro-optical elements of the first region is different from at least one optical function of the micro-optical elements of the second region, and / or the diameter of at least one of the micro-optical elements of the first region differs from the diameter of at least one of the micro-optical elements of the second region by less than 5%;

[0024] In the present disclosure, the density of micro-optical elements over a given area of ​​an eyeglass lens may be defined as the ratio between the total surface area of ​​the micro-optical elements and the area of ​​the given area.

[0025] According to an embodiment, for spatial frequencies between 1 and 5 cycles / degree, the value of the modulation transfer function of the first region is greater than 0.3, for example greater than 0.4 or greater than 0.5; and For a spatial frequency of 15 to 20 cycles / degree, the value of the modulation transfer function of the first region is greater than 0.05, such as greater than 0.1, such as greater than 0.5; and / or For spatial frequencies between 1 and 5 cycles / degree, the value of the modulation transfer function of the second region is greater than 0.3, for example greater than 0.4 or greater than 0.5; and For spatial frequencies of 15 to 20 cycles / degree, the value of the modulation transfer function of the second region is greater than 0.05, such as greater than 0.1, for example greater than 0.5.

[0026] According to one embodiment, at least one of the micro-optical elements of the first region has a mean refractive power value comprised between 1 diopter and 10 diopters, and / or at least one of the micro-optical elements of the second region has a mean refractive power value comprised between 1 diopter and 10 diopters.

[0027] According to an embodiment, the micro-optical elements of the first region are arranged according to a first pattern comprising at least two first concentric rings of micro-optical elements, a first of the at least two first concentric rings being spaced apart by at least 1 millimeter from a second of the at least two first concentric rings; and / or The micro-optical elements in the second region are arranged according to a second pattern including at least two second concentric rings of micro-optical elements, a first of the at least two second concentric rings being spaced at least 1 millimeter from a second of the at least two second concentric rings.

[0028] According to one embodiment, at least one of the micro-optical elements in the first region is spaced apart from at least another of the micro-optical elements in the first region or at least another of the micro-optical elements in the second region by at least 0.3 millimeters.

[0029] According to an embodiment, at least one of the micro-optical elements of the first region or at least one of the micro-optical elements of the second region provides a refractive, diffractive or diffractive optical function.

[0030] According to one embodiment, the eyeglass lens includes a third region including a plurality of micro-optical elements arranged to cover at least 30 percent of the third region, the third region being different from the first region, the third region being different from the second region, and the micro-optical elements of the first region and the micro-optical elements of the third region being arranged such that for a predetermined spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the third region by less than 20%.

[0031] According to one embodiment, each micro-optical element is spaced from another micro-optical element by at least 0.4 millimeters.

[0032] According to one embodiment, each micro-optical element is spaced from another micro-optical element by at least 0.5 millimeters.

[0033] Another object of the present invention is to provide a pair of vision compensation glasses including a frame and two spectacle lenses according to the present disclosure.

[0034] Another object of the present invention is to provide a computer-implemented method for identifying a spectacle lens intended to be worn on an eye of a wearer, the method comprising: - defining a first region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the first region; - defining a second region comprising a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the second region, wherein the first region is different from the second region; - specifying the shape, size and position of each micro-optical element in the first region and the second region such that the first region has a modulation transfer function and the second region has a modulation transfer function, and for a first predetermined spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region by less than 40%. Includes.

[0035] The method according to the invention allows optimization of the optical design of the micro-optical elements to be carried out in at least two different regions of the spectacle lens. This makes it possible to take into account new parameters in the optimization process that may vary across the regions of the spectacle lens and that may affect the performance of the spectacle lens, such as the radius of curvature of the spectacle lens, and / or changes in the focal length and / or refractive correction. Indeed, the optical performance of a spectacle lens varies across the regions of the spectacle lens. Therefore, the method according to the invention allows better control of the performance of the spectacle lens.

[0036] Therefore, the identification of the optical characteristics of the spectacle lens is more accurate and therefore improved, which makes it possible to better identify optical lenses with desired optical performance and desired optical characteristics, so that the resulting spectacle lens exhibits a better trade-off for the wearer between visual acuity and myopia control effectiveness, which refers for example to visual discomfort due to the micro-optical elements realizing the reduction of myopia progression.

[0037] According to one embodiment, the first region comprises the following elements: - the center of the first region is at a different location than the center of the second region; - the shape of the first region is different from the shape of the second region; - the size of the first region is different from the size of the second region; - The orientation of the first region is different from the orientation of the second region. The second region differs from the first region by at least one of the following:

[0038] According to one embodiment, if the value of the modulation transfer function of the first region differs by more than 40 percent from the value of the modulation transfer function of the second region for a first predetermined spatial frequency range, the determining step includes varying optical characteristics of the micro-optical elements in the first region and the second region.

[0039] According to an embodiment, if the modulation transfer function values ​​of the first region differ by less than 40 percent of the modulation transfer function values ​​for a first predetermined spatial frequency range, the determining step comprises: a) defining another first region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the first region; b) defining a second other region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the first region, the first other region being different from the second other region, the second region, and the first region, and the second other region being different from the second region and the first region; c) specifying the shape, size and position of each micro-optical element in the first other region and the second other region such that the first other region has a modulation transfer function and the second other region has a modulation transfer function, and for a first predetermined spatial frequency range, the value of the modulation transfer function of the first other region differs from the value of the modulation transfer function of the second other region by less than 40%. Includes.

[0040] According to an embodiment, if in the identifying step c) the value of the modulation transfer function of the first other region differs by less than 40 percent from the value of the modulation transfer function of the second other region for a first predetermined spatial frequency range, steps a), b) and c) are repeated to spatially scan the optical design of the spectacle lens.

[0041] According to an embodiment, - in the step of defining the first region, the first region is centered on a micro-optical axis of a reference micro-optical element included in the first region, or the first region is centered at least 0.5 millimeters offset from the micro-optical axis of a reference micro-optical element included in the first region; - in the step of defining the second region, the second region is centered on the micro-optical axis of a reference micro-optical element comprised in the second region or is centered at least 0.5 millimeters offset from the micro-optical axis of a reference micro-optical element comprised in the second region.

[0042] According to an embodiment, - in defining the first region, the first region has a circular shape with a diameter comprised between 4 millimeters and 8 millimeters; In defining the second region, the second region has a circular shape with a diameter comprised between 4 millimeters and 8 millimeters.

[0043] In this embodiment, in defining the first region and defining the second region, the first region and the second region are concentric and the first region can include a diameter that is different from the diameter of the second region.

[0044] According to an embodiment, the first region includes a center and the second region includes a center, and the location of the center of the first region is different from the location of the center of the second region.

[0045] According to one embodiment, the method further comprises providing a final lens design of the spectacle lens based on the size, shape and position of the micro-optical elements in the first region and the second region, the final lens design corresponding to the optical design of the spectacle lens intended to be worn by the wearer.

[0046] According to an embodiment, in the determining step, for a second predetermined spatial frequency range, the value of the modulation transfer function of the first region and the value of the modulation transfer function of the second region differ by more than 10%.

[0047] In this embodiment, the first spatial frequency range may be comprised between 1 and 5 cycles / degree and the second spatial frequency range may be comprised between 15 and 20 cycles / degree, or The second spatial frequency range may be comprised between 1 and 5 cycles / degree, and the first spatial frequency range may be comprised between 15 and 20 cycles / degree.

[0048] Another object of the present invention is to provide a method for manufacturing a spectacle lens, comprising the steps of: - identifying a design for an eyeglass lens using the computer-implemented method described above; - manufacturing spectacle lenses according to the design The object of the present invention is to provide a method comprising the steps of:

[0049] In the present disclosure, the expressions "first region," "second region," "third region," "fourth region," "fifth region," and "sixth region" are not limiting and allow one to distinguish between different regions of a spectacle lens according to the present disclosure.

[0050] The following description, which refers to the accompanying drawings, will make clear what constitutes the invention and how it can be put into practice. The invention is not limited to the embodiments shown in the drawings. Thus, when features recited in the claims are followed by reference signs, it will be understood that such signs are included solely for the purpose of improving the understanding of the claims and do not limit the scope of the claims. [Brief explanation of the drawings]

[0051] [Figure 1] 1 shows a schematic perspective view of a pair of glasses including a pair of lenses according to the invention; [Figure 2] 1 shows a schematic axial cross-sectional view of a spectacle lens according to the present disclosure. [Figure 3] 1 shows a schematic perspective half-side view of an eyeglass lens according to the present disclosure; [Figure 4] 1 shows a front view of a first example spectacle lens according to the present disclosure, projected onto a face plane perpendicular to the major axis of the spectacle lens; [Figure 5] 5 shows an enlarged view of a portion of the eyeglass lens shown in FIG. 4. [Figure 6] 3 shows a graphical representation of modulation transfer functions calculated in first and second regions of a spectacle lens according to a first example; [Figure 7] 1 shows a front view of a second example spectacle lens according to the present disclosure, projected onto a face plane perpendicular to the major axis of the spectacle lens; [Figure 8] 1 shows an enlarged view of a portion of a spectacle lens according to a second example. [Figure 9] 10 shows a graphical representation of the modulation transfer functions calculated in a third region and a fourth region of the spectacle lens according to the second example. [Figure 10] 10 shows a graphical representation of the modulation transfer functions calculated in the fifth and sixth regions of the spectacle lens according to the second example. [Figure 11] 1 shows a schematic diagram of a system used to measure modulation transfer functions. [Figure 12] 1 shows a front view of a third example of a spectacle lens according to the present disclosure, projected onto a face plane perpendicular to the major axis of the spectacle lens; [Figure 13] 10 shows an enlarged view of a portion of a spectacle lens according to a third example. [Figure 14] 10 shows a graphical representation of modulation transfer functions calculated in a first region, a second region and a third region of a spectacle lens according to a third example. [Figure 15] 10 shows an enlarged view of a portion of a spectacle lens according to a fourth example. [Figure 16]10 shows a graphical representation of modulation transfer functions calculated in a first region, a second region and a third region of a spectacle lens according to a fourth example. [Figure 17] 10 shows an enlarged view of a portion of a spectacle lens according to a fifth example. [Figure 18] 10 is a graphical representation of modulation transfer functions calculated in a first region, a second region and a third region of a spectacle lens according to a fifth example. [Figure 19] 10 shows an enlarged view of a portion of a spectacle lens according to a sixth example. [Figure 20] 10 shows a graphical representation of modulation transfer functions calculated in a first region and a second region of a spectacle lens according to a sixth example. [Figure 21] 10 shows a graphical representation of the modulation transfer functions calculated in the third and fourth regions of a spectacle lens according to a sixth example. [Figure 22] 10 shows a graphical representation of the modulation transfer functions calculated in the fifth and sixth regions of a spectacle lens according to a sixth example. [Figure 23] 1 illustrates a computer-implemented method according to the present disclosure for identifying eyeglass lenses according to the various examples disclosed above. [Figure 24] 1 illustrates a method according to the present disclosure for manufacturing eyeglass lenses according to the various examples disclosed above. DETAILED DESCRIPTION OF THE INVENTION

[0052] device 1-3 show a spectacle lens 10 according to the present disclosure.

[0053] The spectacle lens 10 is here a concave lens comprising a convex anterior surface 11 and a concave posterior surface 12, but could alternatively be a concave-convex or plano-convex lens.

[0054] As shown in FIG. 1, two similar spectacle lenses 10, a right spectacle lens 10R and a left spectacle lens 10L, are fitted to the right eye E of a wearer. R and left eye E L The device is intended to be attached to the eyeglass frame 20 so that it is positioned in front of the eyeglass frame.

[0055] The spectacle lens 10 shown in FIG. 2 has two opposite optical surfaces: a front surface 11 directed toward the object side and a front surface 12 directed toward the wearer's eye E R , E L The spectacle lens 10 presents a center V10, which is typically the optical or geometric center of the spectacle lens 10.

[0056] The spectacle lens 10 has an optical design that includes macro-optical and micro-optical elements.

[0057] The macro-optical element of the optical design (also called "macro-optical design") provides a macro-optical function that provides at least one overall refractive power over most or all useful surfaces of the spectacle lens 10, providing the wearer's eye with a refractive correction that is adapted to the wearer's refractive correction needs under the wearing conditions. For example, this macro-optical function is provided by the geometry of the front surface 11 or the back surface 12 or both surfaces, typically by adapting the radius of curvature of one or both surfaces of the spectacle lens. The refractive power of the spectacle lens 10 is generally comprised within ±15 diopters.

[0058] The refractive power provided by the macro-optical design includes at least a spherical power, and may also include an astigmatic power and prism deflection depending on the wearer's corrective needs identified by an eye care professional to correct the wearer's visual acuity. Typically, the overall power corresponds to the refractive correction based on the wearer's prescription, for example, under standard wearing conditions. For example, a prescription for a wearer with refractive error includes a power value and an astigmatism value, including the astigmatic power and astigmatism axis for distance and / or near vision.

[0059] A spectacle lens defined according to the present disclosure is adapted to correct the vision of an individual (i.e., a wearer) under a wearing condition. A wearing condition is to be understood as the position of the spectacle lens 10 in a spectacle frame 20 worn by the wearer in front of his or her eye. The wearing condition is defined according to the physiological parameters of the wearer or the geometric parameters of the frame 20 when the frame 20 is worn by the wearer. The wearing condition includes the angle of forward tilt during wearing, the distance from the cornea to the lens, the distance from the pupil to the cornea, the distance from the center of rotation (ERC) to the pupil, and the curvature angle. Figure 1 shows a pair of spectacle lenses numbered 10R and 10L. The spectacle lens 10R is positioned in front of the wearer's right eye E. R The spectacle lens 10L is worn in front of the wearer's left eye E L It is worn before

[0060] An example of a standard wearing condition can be defined by a wearing angle of -8° for adults and 0° to 5° for children, a cornea-to-lens distance of 12 mm, a pupil-to-cornea distance of 2 mm, an ERC-to-pupil distance of 11.5 mm, and a curvature angle of 0°.

[0061] The forward tilt angle during wear is the angle in the vertical plane between the normal to the rear surface 12 of the spectacle lens 10 and the visual axis of the eye in the primary eye position (axis A), which is defined as the horizontal direction when the wearer gazes straight ahead at infinity.

[0062] The cornea-to-lens distance is the distance between the cornea and the posterior surface 12 of the spectacle lens 10 along the visual axis of the eye E in the first position.

[0063] The curvature angle of the eyeglass frame 20 is the angle in the horizontal plane between the normal to the posterior surface 12 of the lens at its center and the sagittal plane.

[0064] The micro-optical elements of the optical design (also called "micro-optical design") of the spectacle lens 10 are made up of several micro-optical elements 13 arranged on at least one of the front and rear surfaces of the lens, preferably on the convex front surface.

[0065] Each micro-optical element has its own optical function and has a small dimension of less than 2 mm, preferably less than 1 mm. Each micro-optical element may be, for example, a microlens, a pyramidal Fresnel lens, a prism, a diffuser, a beam splitter, or a diffraction grating. Micro-optical elements are typically formed by photolithography, holography, molding, machining, or encapsulation.

[0066] This arrangement of all micro-optical elements provides a micro-optical function that is separate from and complementary to the macro-optical function. Thus, the overall optical function of the spectacle lens 10 is the sum of its macro-optical function and its micro-optical function, respectively provided by the macro-optical and micro-optical elements of its optical design. The micro-optical function of the spectacle lens 10 is the optical function provided by the spectacle lens 10 with its macro-optical design, i.e., without any overall refractive power over most or all of the useful radial width of the spectacle lens 10. The macro-optical function of the spectacle lens 10 is the optical function provided by the spectacle lens 10 without its micro-optical design, i.e., without any micro-optical elements.

[0067] Each micro-optical element provides a refractive, diffractive or diffusing function.

[0068] In some embodiments, some or all of the micro-optical elements are refractive micro-optical elements. Each refractive micro-optical element may include a monofocal or bifocal spherical power.

[0069] In another embodiment, some or all of the micro-optical elements are diffractive. Each diffractive micro-optical element comprises, for example, a diffractive pi-Fresnel micro-lens. The diffractive pi-Fresnel micro-lens has a phase function exhibiting a π phase jump at a nominal wavelength λ, which is preferably 550 nm for human eye vision applications. The diffractive pi-Fresnel micro-lens exhibits an optical axis passing through the optical center of the micro-lens. A micro-lens having a diffractive pi-Fresnel micro-optical element diffracts light primarily in two diffraction orders associated with two refractive powers, P(λ) and P(λ). Thus, upon receiving collimated light, the micro-lens focuses the light into two distinct regions on its axis.

[0070] For example, the refractive power P0(λ0) is included within a range of + / −0.12 diopters in addition to the sphero-toric power of the given refractive power of the spectacle lens, which is derived from the wearer's prescription, for example.

[0071] According to an embodiment, the refractive power P1(λ0) is comprised between 1 diopter and 10 diopters in absolute value, and preferably between ±2 diopters and ±6 diopters.

[0072] Alternatively, all or some of the micro-optical elements are diffusing micro-optical elements. Each diffusing micro-optical element comprises a diffusing micro-optical element that scatters light. For example, collimated light is scattered in a cone with an apex angle ranging from + / -1° to + / -40°. In some examples, the diffusing micro-optical elements are adapted to scatter light locally, i.e., at the intersection of a micro-optical element with a wavefront reaching a micro-optical element. Micro-optical elements with diffusing optical functionality can be similar to the micro-optical elements described in document US 10,302,962.

[0073] Each micro-optical element 13 has a micro-optical axis Cm, which typically corresponds to the rotation axis or optical axis of the micro-optical element.

[0074] In the illustrated example, all micro-optical elements 13 are arranged on the front surface 11 of the spectacle lens 10 .

[0075] Alternatively, all or some of the micro-optical elements may be arranged on the rear surface 12 or on both the front surface 11 and the rear surface 12 of the spectacle lens 10 .

[0076] Alternatively, all or part of the micro-optical elements may be embedded within the thickness of the spectacle lens between its front and rear surfaces.

[0077] In practice, the micro-optical elements are formed either as a single integral part with the rest of the spectacle lens (typically by injection molding, press molding, rolling or machining) or alternatively on a film applied to one or both of the front surface 11 and back surface 12 of the spectacle lens 10 (forming a patch or being laminated).

[0078] The spectacle lens 10 is positioned to inhibit the progression of myopia.

[0079] In a non-limiting example, the arrangement of the micro-optical elements 13 of the spectacle lens 10 has optical characteristics that provide a myopia progression reduction function to the wearer's eye. In other words, the micro-optical elements 13 of the spectacle lens 10 have respective optical characteristics that are adapted to reduce the progression of myopia.

[0080] According to an embodiment, the arrangement of the micro-optical elements of the spectacle lens is adapted to provide a specific spatial distribution of blur, also called defocus effect. For this purpose, the micro-optical elements comprise micro-lenses that provide a refractive power different from that of the macro-optical elements of the optical design of the spectacle lens 10.

[0081] 3, the spectacle lens 10 includes an ophthalmic lens center V10, which is typically the optical or geometric center of the spectacle lens 10. The spectacle lens 10 is also defined using a first Cartesian reference coordinate system (V10, x, y, z), in which the lateral axis z passes through the center of rotation ERC of the wearer's eye E.

[0082] As illustrated in FIG. 3, the central gaze direction is defined by two angles (αC, βC) that represent the rotation of the eye from the primary gaze direction. More precisely, the angles βC and αC represent the horizontal and vertical rotation angles that are applied to the eye's center of rotation ERC in Fick's coordinate system to move the eye from the primary gaze reference axis to the eye's gaze axis. A third torsional rotation of the eye, derived from these two angles, is applied, so that the eye's gaze axis conforms to Listing's law. FIG. 3 shows an example of the angles αC and βC related to the eye's center of rotation ERC and the spectacle lens 10. The central gaze direction can be represented by a line passing through the eye's center of rotation ERC.

[0083] The angle αC is defined in a vertical plane passing through the eye's center of rotation ERC, and the angle βC is defined in a horizontal plane passing through the eye's center of rotation ERC. The angle αC is defined as positive when the wearer's eye looks down and negative when the wearer's eye looks up. The angle βC is defined as positive when the wearer's eye looks nasally and negative when the wearer's eye looks temporally.

[0084] In the present disclosure, different regions of a spectacle lens are presented, and typically different parameters for these different regions are identified or defined based on the projection of the regions onto a plane perpendicular to the optical axis of the spectacle lens.

[0085] First Example 4-6, a first example eyeglass lens 10 according to the present disclosure is disclosed.

[0086] The spectacle lens 10 shown in Figure 4 comprises a central region 14 which does not contain any micro-optical elements and which has a circular contour 17, for example with a radius of 4.5 millimeters, centred on the ophthalmic centre V10 of the spectacle lens 10. In variants, the contour of the central region 14 may take on other shapes, such as a polygon (in particular a hexagon) or an ellipse.

[0087] The spectacle lens 10 further includes a first peripheral region 15 disposed around the central region 14 and a second peripheral region 16 disposed around the first peripheral region 15 .

[0088] In the example of Figure 4, the arrangement of micro-optical elements 13 of the spectacle lens 10 is arranged on a first peripheral area 15. A second peripheral area 16 is devoid of any micro-optical elements.

[0089] The first or second "peripheral region" refers to a specific region of the spectacle lens.

[0090] The second peripheral region 16 of the spectacle lens 10 is arranged to be fixed to the spectacle frame 20 .

[0091] The central region 14, the first peripheral region 15, and the second peripheral region 16 are concentric. They are centered at the optical center of the spectacle lens 10. The first peripheral region 15 surrounds the central region 14 and is bounded internally by a circular outline 17 of the central region 14 and externally by a circular outline 18. The second peripheral region 16 surrounds the first peripheral region 15 and is bounded internally by the circular outline 18 of the first peripheral region 15 and externally by a circular outline 19, which may coincide with the outer edge of the spectacle lens 10, as shown in FIG. 4.

[0092] In a non-limiting example, the radius of the circular contour 17 (which is the outer contour of the central region 14 and the inner contour of the first peripheral region 15) is 2.00 mm to 5 mm, preferably 3 to 4.5 mm.

[0093] Preferably, the diameter of the contour 18 (which is the outer contour of the first peripheral region 15 and the inner contour of the second peripheral region 16) is 40.0 mm to 80.0 mm, preferably 50.00 mm to 70.0 mm, which is an example of 60.0 mm in this embodiment. The diameter of the outer circular contour 19 of the second peripheral region 16 (which is the outer edge of the eyeglass lens) is 80 mm to 100.00 mm, preferably 70.00 mm, as shown in the example of the figure.

[0094] Of course, in this example, the contour 17 of the central region 14, the contour 18 of the first peripheral region 15 and the contour 19 of the second peripheral region 16 are circular, but they can also have other shapes, for example polygonal (in particular hexagonal) or elliptical. Typically, the form of the contour 17 of the central region 14, the contour 18 of the first peripheral region 15 and the contour 19 of the second peripheral region 16 is determined by the form of the spectacle lens 10.

[0095] 4 and 5, the micro-optical elements 13 are arranged according to concentric rings of adjacent micro-optical elements 13, centered at the center of the central region 14, which coincides with the center V10 of the spectacle lens 10. Each ring is spaced 1.0 to 1.5 millimeters from each adjacent ring. In FIG. 4, the spectacle lens 10 includes five concentric rings of micro-optical elements.

[0096] In this embodiment, the micro-optical elements of the spectacle lens 10 are all identical micro-lenses. Here, each micro-optical element 13 exhibits a mean refractive power of approximately +4.5 diopters and is an aspherical micro-optical element. The direct diameter of each micro-optical element is approximately 1.12 millimeters, and its curvature is 131.3 millimeters. The mean refractive power of the micro-optical elements is added to the prescribed correction of the spectacle lens 10.

[0097] Spherical mean power means that the spherical refractive power of the micro-optical elements can vary over the surface of the spectacle lens 10. For example, in this embodiment, micro-optical elements belonging to the same ring of micro-optical elements have the same mean refractive power, while micro-optical elements belonging to different rings of micro-optical elements can have different mean refractive powers.

[0098] In Figures 4 and 5, the first peripheral region 15 includes a first region 21 having a circular shape with a diameter of 4 millimeters.

[0099] The first region 21 includes a portion or parts of the micro-optical elements of the first peripheral region 15. Typically, the micro-optical elements included in the first region 21 are arranged to cover at least 30 percent of the total area of ​​the first region 21, where the density of the micro-optical elements within the first region 21 is greater than 31 percent.

[0100] The first region has an outer contour 22 that indicates a geometric center U21. Typically, the geometric center U21 of the first region 21 is spaced at least 4 millimeters from the ophthalmic center V10 of the spectacle lens 10. Here, the geometric center U21 of the first region 21 21 is spaced 9.8 mm from the ophthalmic center V10 of the spectacle lens 10. In the following, the first region 21 is defined in the Cartesian reference coordinate system (U 21 , x 21 , y 21 ) is defined as

[0101] In the present disclosure, the distance between the ophthalmic center V10 of the spectacle lens 10 and the geometric center of any area defined within the first peripheral area 15 is referred to as decentration.

[0102] In Figures 4 and 5, the geometric center U 21 is centered on the micro-optical axis Cm of one of the micro-optical elements included in the first region 21. Here, the geometric center U 21 is centered on the micro-optical axis Cma of the micro-optical elements 13a arranged on the third ring of the spectacle lens 10 starting from the center V10 of the spectacle lens 10. Naturally, in a variant, the first region 21 can be centered on any micro-optical element of the first peripheral region 15 of the spectacle lens 10.

[0103] The first peripheral region 15 further includes a second region 23 having a circular shape with a diameter of 4 millimeters.

[0104] The second region 23 includes a portion or parts of the micro-optical elements of the first peripheral region 15. Typically, the micro-optical elements included in the second region 23 are arranged to cover at least 30 percent of the total area of ​​the first region, where the density of the micro-optical elements in the second region 23 is greater than 40 percent. The positions of the micro-optical elements included in the second region 23 are different from the positions of the micro-optical elements included in the first region 21.

[0105] The second region 23 has a geometric center U 23 Typically, the geometric center U of the second region 23 is 23 is spaced at least 4 millimeters from the ophthalmic center V10 of the spectacle lens 10. Here, the geometric center U of the second region 23 23 is spaced 8.65 mm from the ophthalmic center V10 of the spectacle lens 10. In the following, the second region 23 is defined by a Cartesian reference coordinate system (U 23 , x 23 , y 23 ) is defined as

[0106] Geometric center U of the second region 23 23 is centered at a point C located in a part of the first peripheral region 15 that is free of micro-optical elements. Typically, the geometric center U 23 is centered at a point C located in the middle of two adjacent rings of micro-optical elements starting from the center V10 of the spectacle lens 10, here in the middle of the second and third rings of micro-optical elements. Therefore, the geometric center U of the second region 23 23 is the geometric center U of the first region 21. 21 Typically, in this example, the axis y of the first region 21 is spaced at least 0.5 mm, here at least 1.0 mm, from the axis y 21 is the axis y of the second region 23 23 and spaced at least 1.0 millimeter from the

[0107] 6 and 11, the technical characteristics of the first region 21 and the second region 23 are disclosed. The technical characteristics of the first region 21 and the second region 23 are defined by their modulation transfer functions.

[0108] In this disclosure, the modulation transfer function gives the percentage of contrast transmitted as a function of spatial frequency (expressed as cycles / degree) over a considered area of ​​the spectacle lens 10. The calculation of the modulation transfer function is described above with respect to Figures 3 and 11.

[0109] The modulation transfer function in this example is calculated in a first region 21 and a second region 23. In the following disclosure, the modulation transfer function can be measured directly using the optical system S described with respect to FIG.

[0110] The system S comprises a light capture device C, a light emitting device I configured to generate a collimated beam of light CB, and a diaphragm P arranged on or very close to the spectacle lens 10 and used as a diaphragm for delimiting a first region 21 or a second region 23 for which the modulation transfer function is measured. Only rays of the collimated beam CB that pass through the diaphragm P reach the light capture device. Here, the diaphragm P is positioned on or in front of the front surface F1 of the spectacle lens 10. In a variant of the system S, the diaphragm P can be positioned on or behind the rear surface F2 of the spectacle lens 10.

[0111] 11, the spectacle lens 10 is positioned between the light emitting device I and the light capturing device C. The light emitting device I, the aperture P, the spectacle lens 10 and the light capturing device C are aligned.

[0112] The light source I is a monochromatic or polychromatic visible spectrum light source with a wavelength between 400 nm and 780 nm (λ) and a high quality factor M 2 is a laser source with a λ close to 1. Advantageously, the collimated beam emitted by the source I has a wavelength of 540-560 nm, preferably 550 nm.

[0113] The collimated beam CB is generated by the light emitting device I along an axis A that is substantially perpendicular to the plane perpendicular to the surface of the spectacle lens 10 and is directed to the geometric center U of the first region 21. 21 or the geometric center U of the second region 23 23 11, the collimated beam illuminates the entire area of ​​the first area 21 or the second area 23 of the spectacle lens 10.

[0114] In FIG. 11, the spectacle lens 10 is moved along a plane perpendicular to the axis A to select different specific regions of the spectacle lens 10 to measure the modulation transfer function at different parts of the spectacle lens 10, here typically a first region 21 and then a second region 23.

[0115] Since the spectacle lens 10 is illuminated by a collimated beam, the determined modulation transfer function does not change substantially when the distance between the light emitting device I and the spectacle lens 10 changes.

[0116] The light capture device C includes at least a lens L and an image sensor Sb. The position of the lens L and the position of the sensor Sb can be adjusted to take into account different analysis planes, for example to scan the spectacle lens 10 along the axis z (lateral axis).

[0117] The sensor Sb is configured to capture an image obtained by a collimated light beam generated by the light source I and passed through the spectacle lens 10. Based on this captured image, it is possible to determine a point spread function (PSF) and then to determine the modulation transfer function of the first region 21 or the second region 21 of the spectacle lens 10 by calculating the Fourier transform of the point spread function.

[0118] In another embodiment, the modulation transfer function of the first region 21 or the second region 23 of the spectacle lens 10 is determined by measuring the surface relief of the surface of the spectacle lens 10 that contains the micro-optical elements, here the front surface 11 of the spectacle lens 10. Typically, the surface relief of a surface can be determined using an interferometer. The difference in optical path length between two points belonging to a selected region (first region 21 or second region 23) is determined. For this purpose, the optical path difference (OPD) of each point on the surface of the spectacle lens 10 can be obtained by multiplying the surface relief, denoted Z(x, y), by the refractive index change Δn, which corresponds to the refractive index difference between both materials on either side of the surface that contains the micro-optical elements. In a variant, the point spread functions can be calculated in different planes of the spectacle lens 10, and then the modulation transfer function can be calculated.

[0119] In a variant, the simulated modulation transfer function is estimated before the manufacturing process of the spectacle lens 10. In that case, the first region 21 or the second region 23 of the spectacle lens 10 is selected by projecting onto the spectacle lens 10 a simulated diaphragm P' (i.e., a diaphragm) or the pupil P' of the eye, positioned on the optical design of the spectacle lens 10. In both cases, the diaphragm P' or the center of the projection is centered on the wearer's possible central gaze direction, for example, in the case of the wearer's possible central gaze direction, defined by the two radial directions (axes x, y) of the spectacle lens 10, which are included between 0 and 20°. As shown in FIG. 3, the diaphragm P' is centered on a point indicating the central gaze direction defined by two angles (αC, βC). The diaphragm P' has a shape that corresponds to the shape of the first region 21 or the second region 23. Therefore, the diaphragm P' is located at the geometric center U of the first region 21 when the modulation transfer function is estimated through the first region 21. 21 The aperture P' indicates the geometric center coincident with the geometric center U of the second region 23 when the modulation transfer function is estimated through the second region 23. 23 indicates the geometric center that coincides with

[0120] In the present disclosure, the center of the diaphragm P' or simulated diaphragm P' is centered on the wearer's possible central gaze for example in the case of the wearer's possible central gaze angles comprised between 0 and 20 degrees, defined from two radial directions (axis x and axis y) of the spectacle lens 10. Typically, such an angle corresponds to a point spaced from the center V10 of the spectacle lens 10 by a distance comprised between 0 and 30 millimeters, which typically corresponds to a gaze position on the spectacle lens 10 during reading with a single vision lens.

[0121] With regard to the method described above, the modulation transfer functions of different specific regions (here the first region 21 and the second region 23) of the simulated spectacle lens 10 can be calculated by spatially scanning the field of view of the spectacle lens 10 using simulated apertures P' or projections P' defined for several central gaze directions, thereby making it possible to measure the modulation transfer functions for different eccentricities of the gaze directions. In the present disclosure, the apertures P' that delimit the specific regions (here the first region 21 or the second region 23) have a circular shape with a diameter comprised between 4 and 8 mm, in order to simulate the variations in the size of the wearer's normal pupil, in particular for different simulated lighting environments.

[0122] The density of the micro-optical elements contained in the portion selected through the aperture (here, the first region 21 or the second region 23) is at least 30%, typically between 60% and 100% if the micro-optical elements are continuous, and between 30% and 50% if the micro-optical elements are discontinuous.

[0123] A point spread function (PSF) is calculated, which gives the degree of spreading (blurring) of the image of a point object across the first and second regions 21, 23 of the spectacle lens 10. The point spread function is calculated by simulations known to those skilled in the art using a point source of light emitting in the monochromatic or polychromatic visible spectrum between 400 nm and 780 nm (lambda), typically of ideal Gaussian shape (M2=1), centered at the center V10 of the spectacle lens 10. For each wavelength λ, a point spread function is calculated as the square of the amplitude of the inverse Fourier transform of an aperture function P'(x,y), which simulates a simulated aperture P', and is defined as P'(x,y)=A(x,y)exp(ikOPD(x,y)), where k is the wavenumber (2π / λ), λ is the wavelength of the point source, which is preferably equal to 550 nm, A(x,y) is the amplitude of the pupil function, which is equal to 1 inside the pupil (defined by its diameter and central position) and 0 outside the pupil, and OPD(x,y) corresponds to the optical path difference provided by the spectacle lens 10. A modulation transfer function is then calculated based on the Fourier transform of the calculated point spread function.

[0124] 6, the modulation transfer function is calculated or measured at a wavelength of 550 nm and at the first region 21 or the second region 23. As will be explained below, the modulation transfer function can be estimated for different eccentricities, for example, for eccentricities comprised between 4 mm and 30 mm, if the central region 14 of the spectacle lens 10 does not comprise any micro-optical elements. If the central region 14 of the spectacle lens 10 comprises micro-optical elements, the modulation transfer function can further be estimated for lower eccentricities, for example, comprised between 0 (central gaze direction) and 4 mm.

[0125] In this disclosure, the regions are defined in specific portions of the first peripheral region 15, but it is clear that these regions may also be defined in other portions of the eyeglass lens 10, as long as those portions include micro-optical elements.

[0126] FIG. 6 shows a graphical representation of a modulation transfer function calculated over the first region 21 and the second region 23 of the first peripheral region 15 of the spectacle lens 10 .

[0127] In the present disclosure, the modulation transfer function is calculated for spatial frequencies between 0 and 60 cycles / degree. Typically, spatial frequencies between 0 and 30 cycles / degree, particularly between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree, are relevant to reading tasks. In contrast, spatial frequencies between 0 and 7 cycles / degree are also relevant to the wearer's visual acuity. Generally, low spatial frequencies affect the level of myopia suppression, while high spatial frequencies affect visual acuity.

[0128] Figure 6 shows the same graph. - a horizontal axis profile 1001 of the modulation transfer function calculated over the first region 21 of the spectacle lens 10, a longitudinal profile 1002 of the modulation transfer function calculated over the first region 21 of the spectacle lens 10, and a horizontal axis profile 1003 of the modulation transfer function calculated over the second region 23 of the first peripheral region 15 of the spectacle lens 10, and a longitudinal profile 1004 of the modulation transfer function calculated over the entire second region 23 of the first peripheral region 15 of the spectacle lens 10; Shows.

[0129] In the present disclosure, the horizontal axis profile of the modulation transfer function corresponds to the variation of the estimated or calculated modulation transfer function along the horizontal axis x of the spectacle lens 10. In the following, this profile is referred to as the horizontal modulation transfer function. Typically, the horizontal modulation transfer function corresponds to a cut-away view of the Fourier transform of the point spread function along the horizontal axis x of the spectacle lens 10. In contrast, the vertical axis profile of the modulation transfer function corresponds to the variation of the calculated or estimated modulation transfer function along the vertical axis y of the spectacle lens 10. In the following, this profile is referred to as the vertical modulation transfer function. The vertical modulation transfer function corresponds to a cut-away view of the Fourier transform of the point spread function along the vertical axis y of the spectacle lens 10.

[0130] In FIG. 6, the horizontal modulation transfer function 1001 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 0 and 5 cycles / degree.

[0131] The horizontal modulation transfer function 1003 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.55, 0.50 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 0 and 5 cycles / degree.

[0132] It can also be seen that modulation transfer function 1001 and modulation transfer function 1003 contain values ​​greater than 0.3 in the spatial frequency range contained within 15 to 20 cycles / degree.

[0133] In the following, the expression modulation factor refers to the amplitude of the modulation transfer function, and therefore in the following the modulation factor is defined as a function of the value of the modulation transfer function considered in a certain spatial frequency range.

[0134] The horizontal modulation transfer function 1001 includes a higher modulation rate than the horizontal transfer function 1003 in a spatial frequency range included between 2 cycles / degree and 7 cycles / degree. In addition, the horizontal modulation transfer function 1001 includes a higher modulation rate than the horizontal transfer function 1003 in a spatial frequency range included between 10 and 20 cycles / degree and between 20 and 30 cycles / degree. This means that the horizontal modulation transfer function 1001 includes a higher modulation rate than the horizontal transfer function 1003 in a spatial frequency range included between 2 cycles / degree and 30 cycles / degree.

[0135] Typically, in FIG. 6, the modulation rate of the horizontal modulation transfer function 1001 is - The difference with the modulation rate of the horizontal modulation transfer function 1003 in the spatial frequency range included in 0 to 5 cycles / degree is less than 15 percent; - the difference with the modulation rate of the horizontal modulation transfer function 1003 in the spatial frequency range of 5 to 10 cycles / degree is less than 35 percent (here, 31 percent); - The difference with the modulation rate of the horizontal modulation transfer function 1003 in the spatial frequency range of 10 to 15 cycles / degree is less than 30 percent; - The difference with the modulation rate of the horizontal modulation transfer function 1003 in the spatial frequency range of 15 to 20 cycles / degree is less than 30 percent; - The difference with the modulation rate of the horizontal modulation transfer function 1003 in the spatial frequency range of 20 to 30 cycles / degree is less than 15 percent.

[0136] For a given range of spatial frequencies, the difference between the values ​​of the first modulation transfer function and the values ​​of the second modulation transfer function is less than x% may mean that for each frequency or each sub-range in the given range, the absolute value of the ratio is less than x / 100.

[0137] The numerator of the ratio is a first value, i.e. a value of the modulation transfer function of the first region, associated with that frequency or a subrange thereof; - a second value, i.e. a value of the modulation transfer function of the second region, associated with that subrange; and the denominator of the ratio is the first value or the second value. Preferably, the denominator comprises the maximum value between the first value and the second value.

[0138] The modulation factor of horizontal modulation transfer function 1001 differs from the modulation factor of horizontal modulation transfer function 1003 by more than 10 percent in the spatial frequency ranges included in 5 to 15 cycles / degree and 15 to 20 cycles / degree.

[0139] In FIG. 6, the vertical modulation transfer function 1002 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0140] The vertical modulation transfer function 1004 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.55, 0.50, 0.45 and greater in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0141] It can also be seen that modulation transfer function 1001 and modulation transfer function 1003 contain values ​​greater than 0.3 in the frequency range of 15 to 20 cycles / degree.

[0142] The vertical modulation transfer function 1002 includes a higher modulation ratio than the vertical transfer function 1004 in the spatial frequency range included between 2 cycles / degree and 7 cycles / degree. In addition, the vertical modulation transfer function 1002 includes a higher modulation ratio than the vertical transfer function 1004 in the spatial frequency range included between 10 and 20 cycles / degree and between 20 and 30 cycles / degree. This means that the vertical modulation transfer function 1002 includes a higher modulation ratio than the vertical transfer function 1004 in the spatial frequency range included between 2 cycles / degree and 30 cycles / degree.

[0143] Typically, in FIG. 6, the modulation ratio of the vertical modulation transfer function 1002 is - the difference with the modulation rate of the vertical modulation transfer function 1004 in the spatial frequency range of 0 to 5 cycles / degree is less than 25 percent; - the difference with the modulation rate of the vertical modulation transfer function 1004 in the spatial frequency range of 5 to 10 cycles / degree is less than 30 percent; - the difference with the modulation rate of the vertical modulation transfer function 1004 in the spatial frequency range of 10 to 15 cycles / degree is less than 30 percent; - the difference with the modulation rate of the vertical modulation transfer function 1004 in the spatial frequency range of 15 to 20 cycles / degree is less than 30 percent; The difference from the modulation rate of the vertical modulation transfer function 1004 in the spatial frequency range of 20 to 30 cycles / degree is less than 20 percent.

[0144] Therefore, the modulation factor of vertical modulation transfer function 1002 differs from the modulation factor of vertical modulation transfer function 1004 by more than 10 percent in the spatial frequency ranges included in 5 to 15 cycles / degree and 15 to 20 cycles / degree.

[0145] Second Example 7-10, a second example eyeglass lens 30 according to the present disclosure is disclosed.

[0146] In this embodiment, the spectacle lens 30 includes a central region 14, a first peripheral region 15, and a second peripheral region 16, as disclosed in the previous embodiment shown in Figure 4. In addition, the spectacle lens 30 includes an arrangement of micro-optical elements disposed in the first peripheral region 15, similar to the arrangement of micro-optical elements described above in Figure 4. Like the spectacle lens 10 shown in Figure 4, the spectacle lens 30 includes a first region 21 and a second region 23, as described above. Therefore, only the differences from the embodiment shown in Figures 4 and 5 will be described.

[0147] 7 and 8 includes a third region 31 disposed in the first peripheral region 15. The third region 31 has a circular shape and a diameter of 6 millimeters.

[0148] The third region 31 includes a portion of the micro-optical elements of the first peripheral region 15. Typically, the micro-optical elements included in the third region 31 are arranged to cover at least 30 percent of the total area of ​​the third region 31, where the density of the micro-optical elements within the third region 31 is greater than 41 percent.

[0149] The third region 31 has an outer contour 32 that indicates a geometric center centered on a micro-optical axis Cm of one of the micro-optical elements included in the third region 31. Here, the geometric center of the third region 31 is located at the geometric center U of the first region 21. 21 In other words, this means that the first region 21 and the third region 31 are concentric. As a result, the third region 31 is aligned with the Cartesian reference coordinate system (U 21 , x 21 , y 21 ) is defined as

[0150] The first peripheral region 15 further includes a fourth region 33 having a circular shape with a diameter of 6 millimeters.

[0151] The fourth region 33 includes a portion of the micro-optical elements of the first peripheral region 15. Typically, the micro-optical elements included in the fourth region 33 are arranged to cover at least 30 percent of the total area of ​​the first region, where the density of the micro-optical elements in the fourth region 33 is greater than 31 percent.

[0152] The fourth region 33 has an outer contour 34 that indicates a geometric center centered on a micro-optical axis Cm of one of the micro-optical elements included in the fourth region 33. Here, the geometric center of the fourth region 33 is located at the geometric center U of the second region 23. 23 This means that the second region 23 and the fourth region 33 are concentric. As a result, the fourth region 33 is aligned with the Cartesian reference coordinate system (U 23 , x 23 , y 23 ) is defined as

[0153] The first peripheral region 15 further includes a fifth region 35 having a circular shape with a diameter of 8 millimeters.

[0154] The fifth region 35 includes a portion of the micro-optical elements of the first peripheral region 15. Typically, the micro-optical elements included in the fifth region 35 are arranged to cover at least 30 percent of the total area of ​​the fifth region, where the density of the micro-optical elements within the fifth region 35 is greater than 35 percent.

[0155] The fifth region 35 has an outer contour 36 showing a geometric center centered on the micro-optical axis Cm of one of the micro-optical elements included in the fifth region 35. Here, the geometric center of the fifth region 35 is located at the geometric center U of the first region 21. 21 This means that the third region 21 and the fifth region 35 are concentric. As a result, the fifth region 35 is aligned with the Cartesian reference coordinate system (U 21 , x 21 , y 21 ) is defined as

[0156] The first peripheral region 15 further includes a sixth region 37 having a circular shape with a diameter of 8 millimeters.

[0157] The sixth region 37 includes a portion of the micro-optical elements of the first peripheral region 15. Typically, the micro-optical elements included in the sixth region 37 are arranged to cover at least 30 percent of the total area of ​​the sixth region, where the density of the micro-optical elements in the fifth region 37 is greater than 36 percent.

[0158] The sixth region 37 has an outer contour 38 showing a geometric center centered on the micro-optical axis Cm of one of the micro-optical elements included in the sixth region 37. Here, the geometric center of the sixth region 37 is located at the geometric center U of the second region 23. 23 This means that the second region 23 and the sixth region 37 are concentric. As a result, the sixth region 37 is aligned with the Cartesian reference coordinate system (U 23 , x 23 , y 23 ) is defined as

[0159] With reference to FIGS. 9-10, the technical features of the third region 31, the fourth region 33, the fifth region 35 and the sixth region 37 will be disclosed.

[0160] FIG. 9 shows a graphical representation of the modulation transfer function calculated over the third region 31 and the fourth region 33 of the first peripheral region 15 of the spectacle lens.

[0161] Figure 9 shows the same graph. a horizontal axis profile 1005 of the modulation transfer function calculated over the third region 31 of the spectacle lens 10 (hereinafter referred to as horizontal modulation function 1005), a vertical axis profile 1006 of the modulation transfer function calculated over the third region 31 of the spectacle lens 10 (hereinafter referred to as vertical modulation function 1006), a horizontal axis profile 1007 of the modulation transfer function calculated over the fourth region 33 of the first peripheral region 15 of the spectacle lens 10 (hereinafter referred to as horizontal modulation function 1007), and a vertical axis profile 1008 of the modulation transfer function calculated over the fourth region 33 of the first peripheral region 15 of the spectacle lens 10 (hereinafter referred to as vertical modulation function 1008) Shows.

[0162] In FIG. 9, the horizontal modulation transfer function 1005 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.55 and greater in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0163] The horizontal modulation transfer function 1007 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.57 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0164] It can also be seen that horizontal modulation transfer function 1005 and horizontal modulation transfer function 1007 contain values ​​greater than 0.3 (here, greater than 0.35) in the spatial frequency range contained within 15 to 20 cycles / degree.

[0165] The horizontal modulation transfer function 1007 has a higher modulation ratio than the horizontal transfer function 1005 in the spatial frequency range between 2 and 7 cycles / degree. Additionally, the horizontal modulation transfer function 1007 has a higher modulation ratio than the horizontal transfer function 1005 in the spatial frequency ranges between 10 and 20 cycles / degree and between 20 and 25 cycles / degree. This means that the horizontal modulation transfer function 1007 has a higher modulation ratio than the horizontal transfer function 1005 for the spatial frequency range between 2 and 25 cycles / degree. For spatial frequencies between 24 and 26 cycles / degree, the two horizontal transfer functions 1005 and 1007 exhibit the same modulation ratio, with a value between 0.33 and 0.28. The horizontal modulation transfer function 1007 has a lower modulation ratio than the horizontal transfer function 1005 for the spatial frequency range between 27 and 30 cycles / degree.

[0166] Typically, in FIG. 9, the modulation factor of the horizontal modulation transfer function 1007 is - the difference with the modulation rate of the horizontal modulation transfer function 1005 in the spatial frequency range of 0 to 5 cycles / degree is less than 10 percent (here, 7 percent); - the difference with the modulation rate of the horizontal modulation transfer function 1005 in the spatial frequency range of 5 to 10 cycles / degree is less than 12 percent; - The difference between the modulation rate of the horizontal modulation transfer function 1005 and that of the horizontal modulation transfer function 1005 in the spatial frequency range of 10 to 15 cycles / degree is less than 10 percent; - The difference between the modulation rate of the horizontal modulation transfer function 1005 in the spatial frequency range of 15 to 20 cycles / degree is less than 10 percent; - The difference from the modulation rate of the horizontal modulation transfer function 1005 in the spatial frequency range of 20 to 30 cycles / degree is less than 10 percent.

[0167] Therefore, the modulation ratios of the horizontal modulation transfer functions 1005 and 1007 are approximately the same within a spatial frequency range of 0 to 30 cycles / degree, with a tolerance of less than 10 percent. Specifically, the modulation ratios of the horizontal modulation transfer functions 1005 and 1007 are - less than 10 percent in the spatial frequency range between 2 and 5 cycles / degree; - less than 12 percent in the spatial frequency range between 5 and 10 cycles / degree; - less than 10 percent in the spatial frequency range between 10 and 15 cycles / degree; - less than 10 percent in the spatial frequency range of 15-20 cycles / degree; - Less than 12 percent in the spatial frequency range between 20 and 30 cycles / degree The tolerances are almost the same.

[0168] Therefore, the horizontal modulation transfer functions 1005 and 1007 of the third and fourth regions 31 and 33 exhibit modulation ratios that are closer to each other than the modulation ratios of the horizontal modulation transfer functions 1001 and 1003 of the first and second regions 21 and 23 .

[0169] The horizontal modulation transfer functions 1005, 1007 of the third region 31 and the fourth region 33 are approximately the same.

[0170] In FIG. 9, the vertical modulation transfer function 1006 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0171] The vertical modulation transfer function 1008 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.55, 0.50, 0.45 and greater in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0172] It can also be seen that vertical modulation transfer function 1006 and vertical modulation transfer function 1008 each have a value greater than 0.3 (here, greater than 0.35) in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0173] The vertical modulation transfer function 1008 includes a higher modulation ratio than the vertical transfer function 1006 in the spatial frequency range comprised between 2 cycles / degree and 7 cycles / degree. Additionally, the vertical modulation transfer function 1008 includes a higher modulation ratio than the vertical transfer function 1006 in the spatial frequency ranges comprised between 10 and 20 cycles / degree and between 20 and 30 cycles / degree. The vertical modulation transfer function 1008 includes a higher modulation ratio than the vertical transfer function 1006 in the spatial frequency ranges comprised between 2 cycles / degree and 30 cycles / degree.

[0174] Typically, in FIG. 9, the modulation ratio of the vertical modulation transfer function 1006 is - The difference between the modulation rate of the vertical modulation transfer function 1008 and that of the spatial frequency range included in 0 to 5 cycles / degree is less than 20 percent; - the difference with the modulation rate of the vertical modulation transfer function 1008 in the spatial frequency range of 5 to 10 cycles / degree is less than 20 percent (here, 15 percent); - the difference with the modulation rate of the vertical modulation transfer function 1008 in the spatial frequency range of 10 to 15 cycles / degree is less than 20 percent; - The difference with the modulation rate of the vertical modulation transfer function 1008 in the spatial frequency range of 15 to 20 cycles / degree is less than 20 percent; - The difference with the modulation rate of the vertical modulation transfer function 1008 in the spatial frequency range of 20 to 30 cycles / degree is less than 20 percent.

[0175] Therefore, the modulation ratios of the vertical modulation transfer functions 1006 and 1008 are approximately the same with a tolerance of less than 20 percent in the spatial frequency range comprised between 2 and 30 cycles per degree. Specifically, the modulation ratios of the vertical modulation transfer functions 1006 and 1008 are - less than 20 percent in the spatial frequency range between 2 and 5 cycles / degree; - less than 20 percent (here 15 percent) in the spatial frequency range between 5 and 10 cycles / degree, - less than 20 percent in the spatial frequency range of 10 to 15 cycles / degree; - less than 20 percent in the spatial frequency range of 15-20 cycles / degree; - Less than 20 percent in the spatial frequency range between 20 and 30 cycles / degree The tolerances are almost the same.

[0176] Thus, the difference in the values ​​of the vertical modulation transfer function is greater than 10 percent in the spatial frequency ranges included in 2-5 cycles / degree, 5-15 cycles / degree, and 15-20 cycles / degree.

[0177] FIG. 10 shows a graphical representation of the modulation transfer function calculated over the fourth region 35 and the sixth region 37 of the first peripheral region 15 of the spectacle lens.

[0178] Figure 10 shows the same graph. a horizontal axis profile 1009 of the modulation transfer function calculated over the fourth region 35 of the spectacle lens 10 (hereinafter referred to as horizontal modulation function 1009), a vertical axis profile 1010 of the modulation transfer function calculated over the fourth region 35 of the spectacle lens 10 (hereinafter referred to as vertical modulation function 1010), a horizontal axis profile 1011 of the modulation transfer function calculated over the sixth region 37 of the first peripheral region 15 of the spectacle lens 10 (hereinafter referred to as horizontal modulation function 1011), and a vertical axis profile 1012 of the modulation transfer function calculated over the entire sixth region 37 of the first peripheral region 15 of the spectacle lens 10 (hereinafter referred to as vertical modulation function 1012) Shows.

[0179] In FIG. 10, the horizontal modulation transfer function 1009 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60 to 0.55 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0180] The horizontal modulation transfer function 1011 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.57 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0181] It can also be seen that each of horizontal modulation transfer function 1009 and horizontal modulation transfer function 1011 has a value greater than 0.3 (here, greater than 0.35) in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0182] The modulation factor included in the horizontal modulation transfer function 1009 is lower than that of the horizontal transfer function 1011 for a spatial frequency range included between 2 and 7 cycles / degree. In addition, the horizontal modulation transfer function 1009 includes a modulation factor lower than that of the horizontal transfer function 1011 for a spatial frequency range included between 5 and 12 cycles / degree. The horizontal modulation transfer function 1009 includes a modulation factor lower than that of the horizontal transfer function 1011 for a spatial frequency range included between 2 and 13 cycles / degree. For spatial frequencies included between 13 and 14 cycles / degree, the two horizontal transfer functions 1009 and 1011 exhibit the same modulation factor, with a value included between 0.41 and 0.43. For spatial frequencies included between 14 and 30 cycles / degree, the modulation factor included in the horizontal modulation transfer function 1009 is higher than that of the horizontal transfer function 1011 for a spatial frequency range included between 15 and 30 cycles / degree.

[0183] Typically, in FIG. 10, the modulation factor of the horizontal modulation transfer function 1009 is - The difference between the modulation rate of the horizontal modulation transfer function 1011 and that of the horizontal modulation transfer function 1011 in the spatial frequency range of 0 to 5 cycles / degree is less than 5 percent; - The difference between the modulation rate of the horizontal modulation transfer function 1011 and that of the horizontal modulation transfer function 1011 in the spatial frequency range of 5 to 10 cycles / degree is less than 5 percent; - The difference between the modulation rate of the horizontal modulation transfer function 1011 and that of the horizontal modulation transfer function 1011 in the spatial frequency range of 10 to 15 cycles / degree is less than 5 percent; - The difference between the modulation rate of the horizontal modulation transfer function 1011 and that of the horizontal modulation transfer function 1011 in the spatial frequency range of 15 to 20 cycles / degree is less than 10 percent; - The difference between the modulation rate of the horizontal modulation transfer function 1011 and that of the horizontal modulation transfer function 1011 in the spatial frequency range of 20 to 30 cycles / degree is less than 12 percent.

[0184] Therefore, the modulation rates of the horizontal modulation transfer functions 1009, 1011 are approximately the same with a tolerance of less than 12 percent in the spatial frequency range comprised between 2 and 30 cycles / degree.

[0185] The horizontal modulation transfer functions 1009 and 1011 of the fifth region 35 and the sixth region 37 show modulation ratios that are closer to the modulation ratios of the horizontal modulation transfer functions 1005 and 1007 of the third region 31 and the fourth region 33 .

[0186] In FIG. 10, the vertical modulation transfer function 1010 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60 and above in the spatial frequency range contained between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0187] The vertical modulation transfer function 1012 includes values ​​of 0.95, 0.90, 0.85, 0.80, 0.75, 0.70, 0.65, 0.60, 0.55 and above in a spatial frequency range comprised between 0 and 7 cycles / degree, preferably between 1 and 5 cycles / degree.

[0188] It can also be seen that each of vertical modulation transfer function 1012 and vertical modulation transfer function 1010 includes values ​​greater than 0.4 (here, greater than 0.50) in the spatial frequency range included in 15 to 20 cycles / degree.

[0189] Vertical modulation transfer function 1010 includes a modulation ratio higher than that of vertical transfer function 1012 in a spatial frequency range included between 2 cycles / degree and 30 cycles / degree.

[0190] Typically, in FIG. 10, the modulation ratio of the vertical modulation transfer function 1010 is - the difference between the modulation rate of the vertical modulation transfer function 1012 in the spatial frequency range of 0 to 5 cycles / degree is less than 5 percent; - The modulation ratio of the vertical modulation transfer function 1012 in the spatial frequency range of 5 to 30 cycles / degree is less than 7 percent.

[0191] Therefore, the modulation rates of the vertical modulation transfer functions 1010, 1011 are approximately the same with a tolerance of less than 7 percent in the spatial frequency range comprised between 2 and 30 cycles / degree.

[0192] Third Example 12 to 15, a third example of a spectacle lens 40 according to the present disclosure will be disclosed. Only the differences from FIG. 4 will be described.

[0193] The spectacle lens 40 is divided into three regions: a central region 44, a first peripheral region 45, and a second peripheral region 46. The first peripheral region 45 includes an arrangement of micro-optical elements 43 having at least one optical feature.

[0194] The optical characteristics of the micro-optical elements 43 in the first peripheral region 45 include at least one of the following optical characteristics: refractive power, geometric shape, refractive, diffractive or diffractive optical function, focal length, diameter or size, position.

[0195] The central region 44, the first peripheral region 45, and the second peripheral region 46 are concentric. They are centered on the optical center V40 of the spectacle lens 40. The first peripheral region 45 surrounds the central region 44 and is bounded on the inside by a circular outline 47 of the central region 44 and on the outside by a circular outline 48. The second peripheral region 46 surrounds the first peripheral region 45 and is bounded on the inside by the circular outline 48 of the first peripheral region 45 and on the outside by a circular outline 49 that coincides with the outer edge of the spectacle lens 40.

[0196] The outer circular outline 47 of the central region 44 presents a diameter of 4 millimeters. The inner circular outline of the first peripheral region 45 presents a diameter of 4 millimeters. The outer circular outline 48 of the first peripheral region 45 presents a diameter of 60.0 millimeters. The inner outline of the second peripheral region 46 presents a diameter of 60.0 millimeters, and the outer edge 49 presents a diameter of 70.00 millimeters.

[0197] In this embodiment, the micro-optical elements of spectacle lens 40 are continuous refractive micro-lenses with a diameter of 0.60 millimeters and a refractive power of +4 diopters.

[0198] The first peripheral region 45 includes: - a first region 51 (U) having a circular shape with a diameter of 4 mm; 51 , x 51 , y 51 ), - a second region 53 (U) having a circular shape with a diameter of 4 mm; 53 , x 53 , y 53 ), and - a third region 56 (U) having a circular shape with a diameter of 4 mm; 56 , x 56 , y 56 ) Includes.

[0199] With respect to the example described above, first region 51 and each of second region 53 and third region 56 each include a portion or portions of the micro-optical elements of first peripheral region 45. Typically, the micro-optical elements included in first region 51 are arranged to cover at least 60 percent of the total area of ​​first region 51, the micro-optical elements included in each of second region 53 are arranged to cover at least 60 percent of the total area of ​​second region 53, and the micro-optical elements included in each of third region 56 are arranged to cover at least 60 percent of the total area of ​​third region 56.

[0200] The first area 51 has a geometric center U 1 , which is centered on the micro-optical axis C ma of the micro-optical element 43 a and is spaced 9.8 mm from the center V 40 of the spectacle lens 40 . 51 It has an outer contour 52 showing

[0201] The second region 53 is located at the geometric center U of the first region 51. 51 Geometric center U spaced 0.10mm to 2.00mm (±0.075mm) from 53 where the geometric center U 53 is the geometric center U of the first region 21. 51 In particular, the axis y of the second region 53 is spaced 0.30 millimeters (±0.075 mm) from the 53 is the axis y 51 The first region 51 is spaced 0.30 mm from the vertical axis x 51 is the axis x of the second region 53 53 This corresponds to the center U of the second region 53. 53 is the horizontal axis x 51 , x 53 The center U of the first region 51 along 51 It means to be separated from.

[0202] Typically, the geometric center U 53is centered at a point D located between the edges of two consecutive micro-optical elements, designated as 43a, 43b, respectively. The geometric center U53 of the second region 53 is spaced apart from the geometric center V40 of the spectacle lens 40 by at least 8.7 millimeters.

[0203] The third region 56 has a geometric center U51 of the first region 51 and / or a geometric center U53 of the second region U53 that is spaced 0.10 mm to 2.00 mm (±0.075 mm) apart. 56 Here, the geometric center U 56 is the geometric center U of the first region 51. 51 and spaced 0.35 mm (±0.075 mm) from the geometric center U of the second region. 53 In this example, the second region 53 is spaced 0.17 millimeters (±0.075 mm) from the vertical axis y 53 is the axis y of the third region 56 56 This corresponds to the center U of the third region 56. 56 is the axis y 56 , y 53 The center of the second region 53 along 53 This means that the distance is 0.17 mm from the

[0204] Typically, the geometric center U 56 is centered at a point E located between the edges of three consecutive micro-optical elements, denoted as 43a, 43b, and 43c, respectively. The geometric center U of the second region 53 53 is spaced from the geometric center V40 of the spectacle lens 40 by at least 8.7 millimeters.

[0205] 14, we disclose the technical characteristics of the first region 51, the second region 53 and the third region 56. The technical characteristics of the first region 51, the second region 53 and the third region 56 are considered via the modulation transfer functions calculated or estimated as described above in the first example.

[0206] FIG. 14 shows a graphical representation of the modulation transfer functions calculated over the first region 51, the second region 53 and the third region 56 of the first peripheral region 45 of the spectacle lens 40.

[0207] Figure 14 shows the same graph. a horizontal axis profile 1013 of the modulation transfer function calculated over the first area 51 of the spectacle lens 40 (hereinafter referred to as horizontal modulation function 1013), a horizontal axis profile 1014 of the modulation transfer function calculated over the second region 53 of the spectacle lens 40 (hereinafter referred to as horizontal modulation function 1014), a horizontal axis profile 1015 of the modulation transfer function calculated over the third region 56 of the spectacle lens 40 (hereinafter referred to as horizontal modulation function 1015), a vertical axis profile 1016 of the modulation transfer function calculated over the first area 51 of the spectacle lens 40 (hereafter referred to as horizontal modulation function 1016), a vertical axis profile 1017 of the modulation transfer function calculated over the second region 53 of the spectacle lens 40 (hereafter referred to as horizontal modulation function 1017), a vertical axis profile 1018 of the modulation transfer function calculated over the third region 56 of the spectacle lens 40 (hereinafter referred to as horizontal modulation function 1018) Shows.

[0208] In FIG. 14, horizontal modulation transfer function 1013, horizontal modulation transfer function 1014, and horizontal modulation transfer function 1015 overlap within a tolerance of less than 5 percent.

[0209] As a result, this means that the modulation rate of horizontal modulation transfer function 1013 differs by less than 40 percent (less than 10 percent here) from the modulation rate of horizontal modulation transfer function 1014 and the modulation rate of horizontal modulation transfer function 1015 in the spatial frequency range included in 0 to 60 cycles / degree, particularly in the spatial frequency ranges included in 5 to 15 cycles / degree, 15 to 25 cycles / degree, 25 to 35 cycles / degree, 35 to 45 cycles / degree, 45 to 55 cycles / degree, and 55 to 60 cycles / degree. In other words, the modulation rate of horizontal modulation transfer function 1013, the modulation rate of horizontal modulation transfer function 1014, and the modulation rate of horizontal modulation transfer function 1015 are approximately the same in the spatial frequency range included in 0 to 60 cycles / degree.

[0210] Horizontal modulation transfer function 1013, horizontal modulation transfer function 1014, and horizontal modulation transfer function 1015 each have three valleys in the spatial frequency range of 5 to 60 cycles / degree, and three peaks in the spatial frequency range of 5 to 60 cycles / degree. Horizontal modulation transfer function 1013, horizontal modulation transfer function 1014, and horizontal modulation transfer function 1015 each indicate a modulation factor.

[0211] Each of horizontal modulation transfer function 1013, horizontal modulation transfer function 1014, and horizontal transfer function 1015 has a value greater than 0.6 in the spatial frequency range included in 0 to 7 cycles / degree, and particularly in the spatial frequency range included in 1 to 5 cycles / degree.

[0212] It can also be seen that each of horizontal modulation transfer function 1013, horizontal modulation transfer function 1014, and horizontal transfer function 1015 has a value greater than 0.4 (here, greater than 0.5) even in the spatial frequency range included in 15 to 20 cycles / degree.

[0213] In this example, each of the horizontal modulation transfer functions 1013, 1014, and 1015 is a first valley 302a exhibiting a minimum value 304a equal to 0.47 at a spatial frequency of 10 cycles / degree in the spatial frequency range comprised between 5 and 15 cycles / degree; a second valley 302b that exhibits a minimum value 304b equal to 0.38 at a spatial frequency of 28 cycles / degree in the spatial frequency range comprised between 25 and 35 cycles / degree; a third valley 302c in the spatial frequency range comprised between 45 and 55 cycles / degree, exhibiting a minimum value 304c equal to 0.28 at a spatial frequency of 58 cycles / degree; Shows.

[0214] In addition, each of the horizontal modulation transfer functions 1013, 1014, and 1015 is a first peak 306a exhibiting a maximum value 308a equal to 0.82 at a spatial frequency of 18 cycles / degree in the spatial frequency range comprised between 15 and 25 cycles / degree; a second peak 306b that exhibits a maximum value 308b equal to 0.62 at a spatial frequency of 47 cycles / degree in the spatial frequency range comprised between 35 and 45 cycles / degree; - a third peak 306c in the spatial frequency range between 55 and 60 cycles / degree, which exhibits a maximum value 308c equal to 0.45 at a spatial frequency of 56 cycles / degree; Shows.

[0215] Thus, each of the horizontal modulation transfer functions 1013, 1014, and 1015 exhibits a value in the spatial frequency range of 15 to 25 cycles / degree that is at least 10 percent higher than the value of the horizontal modulation transfer function 1013, 1014, and 1015 in the spatial frequency range of 5 to 12 cycles / degree. Similarly, each of the horizontal modulation transfer functions 1013, 1014, and 1015 exhibits a value in the spatial frequency range of 35 to 45 cycles / degree that is at least 10 percent higher than the value of the horizontal modulation transfer function 1013, 1014, and 1015 in the spatial frequency range of 25 to 32 cycles / degree. Each of the horizontal modulation transfer functions 1013, 1014, and 1015 exhibits a value in the spatial frequency range of 55 to 60 cycles / degree that is at least 10 percent higher than the value of the horizontal modulation transfer function 1013, 1014, and 1015 in the spatial frequency range of 45 to 52 cycles / degree.

[0216] Each of vertical modulation transfer function 1016, vertical modulation transfer function 1017, and vertical modulation transfer function 1018 indicates a modulation rate.

[0217] In FIG. 14, vertical modulation transfer function 1016, vertical modulation transfer function 1017, and vertical modulation transfer function 1018 overlap within a tolerance of less than 5 percent.

[0218] This means that the modulation factor of vertical modulation transfer function 1016 differs from the modulation factor of vertical modulation transfer function 1017 and the modulation factor of vertical modulation transfer function 1018 by less than 40 percent (here 5 percent) in the spatial frequency range included in 0 to 60 cycles / degree.

[0219] In other words, the modulation rate of vertical modulation transfer function 1016, the modulation rate of vertical modulation transfer function 1017, and the modulation rate of vertical modulation transfer function 1018 are approximately the same in the spatial frequency range included in 0 to 60 cycles / degree.

[0220] Each of vertical modulation transfer function 1016, vertical modulation transfer function 1017, and vertical modulation transfer function 1018 has a value greater than 0.6 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0221] It can also be seen that vertical modulation transfer function 1016, vertical modulation transfer function 1017, and vertical modulation transfer function 1018 each have a value greater than 0.4 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0222] Vertical modulation transfer function 1016, vertical modulation transfer function 1017, and vertical modulation transfer function 1018 have two valleys in the spatial frequency range of 5 to 60 cycles / degree and one peak in the spatial frequency range of 5 to 60 cycles / degree.

[0223] In particular, each of the vertical modulation transfer functions 1016, 1017, and 1018 is a first valley 310a exhibiting a minimum value 312a equal to 0.40 at a spatial frequency of 23 cycles / degree in the spatial frequency range comprised between 5 and 25 cycles / degree; a second valley 310b that exhibits a minimum value 312b equal to 0.24 at a spatial frequency of 57 cycles / degree in the spatial frequency range comprised between 38 and 60 cycles / degree; Shows.

[0224] Additionally, each of the vertical modulation transfer functions 1016, 1017, 1018 exhibits a peak 314a that exhibits a maximum value 316a equal to 0.68 at a spatial frequency of 33 cycles / degree in the spatial frequency range comprised between 25 and 40 cycles / degree.

[0225] As a result, this means that the modulation rate of vertical modulation transfer function 1016 differs by less than 40 percent (here 10 percent) from the modulation rate of vertical modulation transfer function 1017 and the modulation rate of vertical modulation transfer function 1018 in the spatial frequency range comprised between 0 and 60 cycles / degree.

[0226] Each of the vertical modulation transfer functions 1016, 1017, 1018 exhibits a value in the spatial frequency range comprised between 25 and 40 cycles / degree that is at least 10 percent higher than the value of the vertical modulation transfer function 1016, 1017, 1018 in the spatial frequency range comprised between 5 and 23 cycles / degree.

[0227] Thus, in this example, it can be seen that the values ​​of the different vertical modulation transfer functions are approximately the same, and the different horizontal modulation transfer functions are approximately the same within a 5 percent tolerance.

[0228] Fourth Example 15-16, a modified form of a third example spectacle lens according to the present disclosure will be disclosed. Only the differences from FIGS. 12-14 will be described.

[0229] In this example, the spectacle lens comprises a similar design to the spectacle lens 40 shown in Figures 12 and 13. Specifically, in this variant, the micro-optical elements of the spectacle lens are continuous refractive bifocal micro-optical elements with a diameter of 1.50 millimeters and a refractive power of +4 diopters at the periphery of the micro-optical elements and 0 diopters at the center of the micro-optical elements.

[0230] In this embodiment, the spectacle lens has a first region 59 (U 59 , x 59 , y 59 ), the second region 61 (U61, x61 , y 61 ) and the third region 65 (U65, x 65 , y 65 Each of the first region 59, the second region 61 and the third region 65 has a circular shape with a diameter of 4 millimeters.

[0231] For the example described above, first region 59 and each of second region 61 and third region 65 each include a portion or portions of the micro-optical elements of the first peripheral region. Typically, the micro-optical elements included in first region 59 are arranged to cover at least 60 percent of the total area of ​​first region 59, the micro-optical elements included in each second region 61 are arranged to cover at least 60 percent of the total area of ​​second region 61, and the micro-optical elements included in each third region 65 are arranged to cover at least 60 percent of the total area of ​​third region 65.

[0232] The first region 59 has a geometric center U that is centered on the micro-optical axis Cma of the micro-optical element 53a, which is spaced 9.0 millimeters from the center of the spectacle lens. 59 It has an outer contour 58 showing

[0233] The second region 61 is located at the geometric center U of the first region 59. 59 Geometric center U spaced 0.10mm to 2.00mm (±0.075mm) from 61 , where the geometric center U61 is spaced 0.75 millimeters (±0.075 mm) from the geometric center U59 of the first region 59. In this example, the axis x 59 is the axis x of the second region 61 61 This corresponds to the center U of the second region 61. 61 is the (horizontal) axis x 59 , x 61 Along the center of the first region 59 59 It means to be separated from.

[0234] Typically, the geometric center U 61is centered at a point D located between the two micro-optical elements 53a, 53b. The geometric center U of the second region 61 61 is spaced at least 9.7 millimeters from the geometric center of the spectacle lens shown in FIG.

[0235] The third region 65 is located at the geometric center U of the first region 59. 59 and / or the geometric center U of the second region 61 61 The outer contour 64 represents a geometric center U 65 spaced 0.10 mm to 2.00 mm (±0.075 mm) from the 65 is the geometric center U of the first region 59 59 and the geometric center U of the second region is spaced 0.86 mm (±0.075 mm) from 61 In this example, the second region 61 is spaced 0.43 millimeters (±0.075 mm) from the vertical axis y 61 is the axis y of the third region 65 65 This corresponds to the center U of the third region 65. 65 is the axis y 61 , y 65 The center of the second region 61 along 61 This means that the distance is 0.43 mm from the

[0236] Typically, the geometric center U 65 is centered at a point E located between the edges of three consecutive micro-optical elements, designated as 53a, 53b, and 53c, respectively. The geometric center U of the third region 65 65 is spaced at least 9.76 millimeters from the geometric center of the spectacle lens.

[0237] 16, we disclose the technical characteristics of the first region 59, the second region 61 and the third region 65. The technical characteristics of the first region 59, the second region 61 and the third region 65 are considered via the modulation transfer functions calculated or estimated as described above in the first example.

[0238] FIG. 16 shows a graphical representation of modulation transfer functions calculated over a first region 59, a second region 61 and a third region 65 of a first peripheral region of a spectacle lens.

[0239] Figure 16 shows the same graph. a horizontal axis profile 1019 of the modulation transfer function calculated over the first region 59 of the spectacle lens (hereinafter referred to as horizontal modulation function 1019), a horizontal axis profile 1020 of the modulation transfer function calculated over the second region 61 of the spectacle lens (hereinafter referred to as horizontal modulation function 1020), a horizontal axis profile 1021 of the modulation transfer function calculated over the third region 65 of the spectacle lens (hereinafter referred to as horizontal modulation function 1021), a vertical axis profile 1022 of the modulation transfer function calculated over the first region 59 of the spectacle lens (hereinafter referred to as horizontal modulation function 1022), a vertical axis profile 1023 of the modulation transfer function calculated over the second region 61 of the spectacle lens (hereinafter referred to as horizontal modulation function 1023), a vertical axis profile 1024 of the modulation transfer function calculated over the third region 65 of the spectacle lens (hereinafter referred to as horizontal modulation function 1024); Shows.

[0240] Each of horizontal modulation transfer function 1019, horizontal modulation transfer function 1020, and horizontal transfer function 1021 has a value greater than 0.4 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0241] It can also be seen that horizontal modulation transfer function 1019, horizontal modulation transfer function 1020, and horizontal transfer function 1021 each have a value greater than 0.25 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0242] Each of horizontal modulation transfer function 1019, horizontal modulation transfer function 1020, and horizontal modulation transfer function 1021 indicates a modulation rate.

[0243] The modulation rate of horizontal modulation transfer function 1019 differs by less than 40 percent (less than 25 percent here) from the modulation rate of horizontal modulation transfer function 1020 and the modulation rate of horizontal modulation transfer function 1021 in the spatial frequency range included in 0 to 60 cycles / degree. In other words, the modulation rate of horizontal modulation transfer function 1019, the modulation rate of horizontal modulation transfer function 1020, and the modulation rate of horizontal modulation transfer function 1021 are approximately the same within a tolerance of 25 percent in the spatial frequency range included in 0 to 60 cycles / degree.

[0244] In FIG. 16, each of the horizontal modulation transfer functions 1019, 1020, 1021 has two valleys in the spatial frequency range between 5 and 60 cycles / degree and one peak in the spatial frequency range between 5 and 60 cycles / degree.

[0245] Thus, horizontal modulation transfer function 1019, horizontal modulation transfer function 1020 and horizontal modulation transfer function 1021 exhibit one peak 402a with a maximum value 404a equal to 0.53 at a spatial frequency of 47 cycles / degree in the spatial frequency range comprised between 45 and 53 cycles / degree.

[0246] Therefore, each of the horizontal modulation transfer functions 1019, 1020, 1021 exhibits a value in the spatial frequency range comprised between 45 and 53 cycles / degree that is at least 10 percent higher than the value of the horizontal modulation transfer function 1019, 1020, 1021 in the spatial frequency range comprised between 5 and 40 cycles / degree.

[0247] In the spatial frequency range between 45 and 53 cycles / degree, the modulation rate of horizontal modulation transfer function 1019 is approximately the same as the modulation rate of horizontal modulation transfer function 1020 and the modulation rate of horizontal modulation transfer function 1021 within a tolerance of 10 percent. In particular, in the spatial frequency range between 45 and 50 cycles / degree, the modulation rate of horizontal modulation transfer function 1019 differs from the modulation rate of horizontal modulation transfer function 1020 and the modulation rate of horizontal modulation transfer function 1021 by less than 15 percent.

[0248] The modulation factor of horizontal modulation transfer function 1019 differs from the modulation factor of horizontal modulation transfer function 1020 and the modulation factor of horizontal modulation transfer function 1021 by more than 10 percent in the spatial frequency ranges included in 5 to 10 cycles / degree and 10 to 15 cycles / degree.

[0249] The modulation factor of horizontal modulation transfer function 1019 differs from the modulation factor of horizontal modulation transfer function 1020 and the modulation factor of horizontal modulation transfer function 1021 by at least 40 percent in the spatial frequency range comprised between 55 and 60 cycles / degree.

[0250] Similarly, each of vertical modulation transfer function 1022, vertical modulation transfer function 1023, and vertical modulation transfer function 1024 indicates a modulation rate.

[0251] Each of vertical modulation transfer function 1022, vertical modulation transfer function 1023, and vertical transfer function 1024 has a value greater than 0.4 in the spatial frequency range included in 0 to 7 cycles / degree, particularly in the spatial frequency range included in 1 to 5 cycles / degree.

[0252] It can also be seen that each of the vertical modulation transfer function 1022, vertical modulation transfer function 1023, and vertical transfer function 1024 has a value greater than 0.17 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0253] Vertical modulation transfer function 1022, vertical modulation transfer function 1023 and vertical modulation transfer function 1024 do not have any valleys or peaks in the spatial frequency range comprised between 5 and 60 cycles / degree.

[0254] In FIG. 16, the modulation factor of vertical modulation transfer function 1022 differs by less than 40 percent from the modulation factor of vertical modulation transfer function 1023 and the modulation factor of vertical modulation transfer function 1024 in the spatial frequency range of 2 to 60 cycles / degree.

[0255] It can be seen that the modulation factor of vertical modulation transfer function 1022 differs by more than 10 percent from the modulation factor of vertical modulation transfer function 1023 and the modulation factor of vertical modulation transfer function 1024 in the spatial frequency ranges of 5 to 10 cycles / degree and 10 to 15 cycles / degree.

[0256] In this example, the modulation transfer function is very stable from one direction (eg, along axis x of the spectacle lens) to another direction (eg, along axis y) and from one region to another.

[0257] Fifth Example 17-18-a, a modified form of a fifth example spectacle lens according to the present disclosure will be disclosed. Only the differences from FIGS. 12-14 and 15-16 will be described.

[0258] In this example, the spectacle lens includes a design similar to the spectacle lens 40 shown in Figures 12 and 13. However, in this fifth example, the micro-optical elements of the spectacle lens are continuous Pi-Fresnel micro-optical elements (aspheric micro-optical elements) with a diameter of 2.0 millimeters and a refractive mean power of +4.5 diopters for the first diffraction order and 0 diopters for the zeroth diffraction order.

[0259] In this embodiment, the spectacle lens has a first region 67 (U 67 , x 67 , y 67 ), Second Area 69 (U 69 , x 69 , y 69 ) and the third region 71 (U71, x 71 , y 71 Each of the first region 67, the second region 69 and the third region 71 has a circular shape with a diameter of 4 millimeters.

[0260] For the above example, first region 67 and each of second region 69 and third region 71 each include a portion or portions of the micro-optical elements of the first peripheral region. Typically, the micro-optical elements included in first region 67 are arranged to cover at least 60 percent of the total area of ​​first region 67, the micro-optical elements included in each second region 69 are arranged to cover at least 60 percent of the total area of ​​second region 69, and the micro-optical elements included in each third region 71 are arranged to cover at least 60 percent of the total area of ​​third region 71.

[0261] The first region 67 has an outer contour 66 that presents a geometric center U67 centered on the micro-optical axis Cma of the micro-optical element 63a, spaced 7.0 millimeters from the center of the spectacle lens.

[0262] The second region 69 is located at the geometric center U of the first region 67. 67 The outer contour 68 represents a geometric center U 69 spaced 0.10 mm to 2.00 mm (±0.075 mm) from the 69 is the geometric center U of the first region 67 67 In this example, the vertical axis x of the first region 67 is spaced 1.00 millimeters (±0.075 mm) from the 67 is the axis x of the second region 69 69 This corresponds to the center U of the second region 69. 69 is the horizontal axis x 67 , x 69 Along the center of the first region 67 67 It means to be separated from.

[0263] Typically, the geometric center U 69 is centered at a point D located between the two micro-optical elements 63a, 63b. The geometric center U of the second region 69 69 is spaced at least 6.00 millimeters from the geometric center of the spectacle lens shown in FIG.

[0264] The third region 71 is located at the geometric center U of the first region 67. 67 and / or the geometric center U of the second region U69 69 Geometric center U spaced 0.10mm to 2.00mm (±0.075mm) from 71 where the geometric center U 71 is the geometric center U of the first region 67 67 and the geometric center U of the second region is spaced 1.07 mm (±0.075 mm) from 69 In this example, the second region 69 is spaced 0.58 millimeters (±0.075 mm) from the vertical axis y 69is the axis y of the third region 71 71 This corresponds to the center U of the third region 71. 71 is the axis y 69 , y 71 Along the center of the second region 69 69 This means that the distance between the two points is 0.58 mm.

[0265] Typically, the geometric center U 71 is centered at a point E located between the edges of three consecutive micro-optical elements, respectively labeled 63a, 63b, and 63c. The geometric center U of the second region 69 69 is spaced at least 6.03 millimeters from the geometric center of the spectacle lens.

[0266] 18, we disclose the technical characteristics of the first region 67, the second region 69 and the third region 71. The technical characteristics of the first region 67, the second region 69 and the third region 71 are considered via the modulation transfer functions calculated or estimated as described above in the first example.

[0267] FIG. 18 shows a graphical representation of modulation transfer functions calculated over a first region 67, a second region 69 and a third region 71 of a first peripheral region of a spectacle lens.

[0268] Figure 18 shows the same graph. a horizontal axis profile 1025 of the modulation transfer function calculated over the first region 67 of the spectacle lens (hereinafter referred to as horizontal modulation function 1025), a horizontal axis profile 1026 of the modulation transfer function calculated over the second region 69 of the spectacle lens (hereinafter referred to as horizontal modulation function 1026), a horizontal axis profile 1027 of the modulation transfer function calculated over the third region 71 of the spectacle lens (hereinafter referred to as horizontal modulation function 1027), a vertical axis profile 1028 of the modulation transfer function calculated over the first region 67 of the spectacle lens (hereinafter referred to as horizontal modulation function 1028), a vertical axis profile 1029 of the modulation transfer function calculated over the second region 69 of the spectacle lens (hereinafter referred to as horizontal modulation function 1029), a vertical axis profile 1030 of the modulation transfer function calculated over the third region 71 of the spectacle lens (hereinafter referred to as horizontal modulation function 1030); Shows.

[0269] Each of horizontal modulation transfer function 1025, horizontal modulation transfer function 1026, and horizontal transfer function 1027 has a value greater than 0.4 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0270] It can also be seen that each of horizontal modulation transfer function 1025, horizontal modulation transfer function 1026 and horizontal transfer function 1027 has a value greater than 0.40 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0271] Each of vertical modulation transfer function 1028, vertical modulation transfer function 1029, and vertical transfer function 1030 has a value greater than 0.4 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0272] It can also be seen that vertical modulation transfer function 1028, vertical modulation transfer function 1029, and vertical transfer function 1030 each have a value greater than 0.40 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0273] Each of horizontal modulation transfer function 1025, horizontal modulation transfer function 1026, and horizontal modulation transfer function 1027 indicates a modulation rate.

[0274] Similarly, vertical modulation transfer function 1028, vertical modulation transfer function 1029, and vertical modulation transfer function 1030 each indicate a modulation rate.

[0275] Vertical modulation transfer function 1028, vertical modulation transfer function 1029 and vertical modulation transfer function 1030 do not have any valleys or peaks in the spatial frequency range comprised between 5 and 60 cycles / degree.

[0276] In this example, the modulation rate of horizontal modulation transfer function 1025 is approximately the same as the modulation rate of horizontal modulation transfer function 1026 and the modulation rate of horizontal modulation transfer function 1027 within a tolerance of 15 percent in the spatial frequency range included in 0 to 60 cycles / degree. In other words, the modulation rate of horizontal modulation transfer function 1025 differs from the modulation rate of horizontal modulation transfer function 1026 and the modulation rate of horizontal modulation transfer function 1027 by less than 15 percent in the spatial frequency range included in 0 to 60 cycles / degree.

[0277] Additionally, the modulation ratio of vertical modulation transfer function 1028 is approximately the same (within a 15 percent tolerance) as the modulation ratio of vertical modulation transfer function 1029 and the modulation ratio of vertical modulation transfer function 1030 in the spatial frequency range of 0 to 60 cycles / degree. In other words, the modulation ratio of vertical modulation transfer function 1028 differs by less than 10 percent from the modulation ratio of vertical modulation transfer function 1029 and the modulation ratio of vertical modulation transfer function 1030 in the spatial frequency range of 0 to 60 cycles / degree.

[0278] In addition, in the spatial frequency range of 0 to 60 cycles / degree, - the modulation rate of the horizontal modulation transfer function 1025 differs from the modulation rate of the vertical modulation transfer function 1028 by less than 10 percent; - the modulation rate of the horizontal modulation transfer function 1026 differs from the modulation rate of the vertical modulation transfer function 1029 by less than 10 percent; - The modulation rate of the horizontal modulation transfer function 1027 differs from the modulation rate of the vertical modulation transfer function 1030 by less than 10 percent We can see that.

[0279] Therefore, in this embodiment, the value of the modulation transfer function is very stable from one direction (eg along the x-axis of the spectacle lens) to another and from one region to another.

[0280] Sixth Example 19-22, a sixth example of a spectacle lens 70 according to the present disclosure will be disclosed. Only the differences from the already disclosed spectacle lens 10 will be described.

[0281] The spectacle lens 70, like the spectacle lens 10, includes a central region, a first peripheral region 75 disposed around the central region, and a second peripheral region disposed around the first peripheral region. The regions of the spectacle lens 70 are concentric. The central region and the second peripheral region are free of micro-optical elements. The sizes of these regions are similar to those previously disclosed for the spectacle lens 10.

[0282] The spectacle lens 70 includes an arrangement of micro-optical elements 73 having a shape similar to the micro-optical elements 13 of the spectacle lens 10. These micro-optical elements 73 are positioned in a first peripheral region of the spectacle lens 70. For example, the density of the arrangement of micro-optical elements on the first peripheral region of the spectacle lens 70 is comprised between 30 and 70 percent, for example between 40 and 60 percent.

[0283] In this embodiment, the micro-optical elements 73 of the spectacle lens 70 are all identical. Each micro-optical element 73 has a diameter of 1.12 millimeters and a spherical refractive power of 3.5 diopters. In contrast to the spectacle lens 10, each micro-optical element 73 is spaced from an adjacent micro-optical element 73 by at least 0.1 millimeter, here at least 0.5 millimeter. For example, the edge of one optical element 73 is spaced from the edge of an adjacent optical element by at least 0.5 millimeter.

[0284] Similar to the spectacle lens 10, the first peripheral region of the spectacle lens 70 shown in FIG. 19 is a first region 81 (U81, x 81 , y 81 ) and a second region 85 (U85, x 85 , y 85) Each of the first region 81 and each of the second regions 85 includes a portion or portions of the micro-optical elements of the first peripheral region. Typically, the micro-optical elements included in the first region 81 are arranged to cover at least 30 percent of the total area of ​​the first region 81, and the micro-optical elements included in each of the second regions 85 are arranged to cover at least 35 percent of the total area of ​​the second region 85.

[0285] The first region 81 has a geometric center U centered on the micro-optical axis Cme of the micro-optical element 73e, which is spaced 9.8 millimeters from the center of the spectacle lens 70. 81 The outer contour 82 shows:

[0286] The second region 85 is located at the geometric center U of the first region 81. 81 Geometric center U spaced 0.10mm to 2.00mm (±0.075mm) from 85 where the geometric center U 85 is the geometric center U of the first region 81. 81 Typically, the geometric center U is spaced 0.85 mm (±0.075 mm) from the 85 is centered at a point E located between the edges of two adjacent micro-optical elements, namely, micro-optical element 73e and another micro-optical element numbered 73f. The geometric center U of the second region 85 85 is spaced at least 8.00 millimeters from the geometric center V70 of the spectacle lens 70. In this example, the axis x 81 is the axis x of the second region 85 85 coincides with the axis y 81 is the axis y 85 The distance between the first and second electrodes is 0.85 mm.

[0287] 19 includes a third region 86 having a circular shape with a diameter of 4 millimeters and a fourth region 88 having a circular shape with a diameter of 4 millimeters. Each of the third region 86 and the fourth region 88 includes a portion or portions of the micro-optical elements of the first peripheral region. Typically, the micro-optical elements included in the third region 86 are arranged to cover at least 25 percent of the total area of ​​the third region 86, and the micro-optical elements included in each of the fourth regions 88 are arranged to cover at least 35 percent of the total area of ​​the fourth region 88.

[0288] The third region 86 has an outer contour 87 that indicates a geometric center centered on the micro-optical axis Cm of one of the micro-optical elements included in the third region 86. Here, the geometric center of the third region 86 is the geometric center U of the first region 81. 81 In other words, this means that the first region 81 and the third region 86 are concentric.

[0289] The fourth region 88 has an outer contour 89 that indicates a geometric center centered on the micro-optical axis Cm of one of the micro-optical elements included in the fourth region 88. Here, the geometric center of the fourth region 88 is located at the geometric center U of the second region 85. 85 This means that the second region 85 and the fourth region 88 are concentric.

[0290] The first peripheral region further includes a fifth region 90 having a circular shape with a diameter of 8 millimeters.

[0291] The fifth region 90 includes a portion of the micro-optical elements of the first peripheral region. Typically, the micro-optical elements included in the fifth region 90 are arranged to cover at least 30 percent of the total area of ​​the fifth region 90. Here, the density of the micro-optical elements within the fifth region 90 is greater than 35 percent.

[0292] The fifth region 90 has an outer contour 91 that indicates a geometric center centered on the micro-optical axis Cm of one of the micro-optical elements included in the fifth region 90. Here, the geometric center of the fifth region 90 is located at the geometric center U of the first region 81. 81 This means that the third region 81 and the fifth region 90 are concentric.

[0293] The first peripheral region further includes a sixth region 92 having a circular shape with a diameter of 8 millimeters.

[0294] The sixth region 92 includes a portion of the micro-optical elements of the first peripheral region. Typically, the micro-optical elements included in the sixth region 92 are arranged to cover at least 30 percent of the total area of ​​the sixth region 92. Here, the density of the micro-optical elements in the fifth region 92 is greater than 35 percent.

[0295] The sixth region 92 has an outer contour 93 that indicates a geometric center centered on the micro-optical axis Cm of one of the micro-optical elements included in the sixth region 92. Here, the geometric center of the sixth region 92 is located at the geometric center U of the second region 85. 85 This means that the second region 85 and the sixth region 92 are concentric.

[0296] With reference to FIGS. 20 to 22, technical features of the first region 81, the second region 85, the third region 86, the fourth region 88, the fifth region 90 and the sixth region 92 will be disclosed.

[0297] FIG. 20 shows a graphical representation of a modulation transfer function calculated over a first region 81 and a second region 85 of a first peripheral region of an eyeglass lens 70.

[0298] Figure 20 shows the same graph. a horizontal axis profile 1031 of the modulation transfer function calculated over the first area 81 of the spectacle lens 70 (hereinafter referred to as horizontal modulation function 1031), a vertical axis profile 1032 of the modulation transfer function calculated over the first area 81 of the spectacle lens 70 (hereinafter referred to as vertical modulation function 1032), a horizontal axis profile 1033 of the modulation transfer function calculated over the second area 85 of the first peripheral area of ​​the spectacle lens 70 (hereinafter referred to as horizontal modulation function 1033), and a vertical axis profile 1034 of the modulation transfer function calculated over the fourth region 85 of the first peripheral region of the spectacle lens 70 (hereinafter referred to as vertical modulation function 1034) Shows.

[0299] Each of horizontal modulation transfer function 1031 and horizontal modulation transfer function 1033 has a value greater than 0.55 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0300] It can also be seen that each of horizontal modulation transfer function 1031 and horizontal modulation transfer function 1033 has a value greater than 0.23 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0301] Vertical modulation transfer function 1032 and vertical modulation transfer function 1034 each have a value greater than 0.4 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0302] It can also be seen that vertical modulation transfer function 1032 and vertical modulation transfer function 1034 each have a value greater than 0.25 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0303] Each of the horizontal modulation transfer function 1031 and the horizontal modulation transfer function 1033 indicates a modulation rate.

[0304] The modulation factor of horizontal modulation transfer function 1031 differs from the modulation factor of horizontal modulation transfer function 1033 by less than 10 percent in spatial frequency ranges between 0 and 30 cycles / degree, typically between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree.

[0305] Therefore, the modulation rates of the horizontal modulation transfer functions 1031, 1033 are approximately the same within a spatial frequency range comprised between 0 and 30 cycles / degree, typically within a tolerance of less than 10 percent in spatial frequency ranges comprised between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree.

[0306] Additionally, vertical modulation transfer function 1032 and vertical modulation transfer function 1034 each indicate a modulation factor.

[0307] The modulation factor of vertical modulation transfer function 1032 differs from the modulation factor of vertical modulation transfer function 1034 by less than 10 percent in spatial frequency ranges between 0 and 30 cycles / degree, typically between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree.

[0308] Therefore, the modulation ratios of vertical modulation transfer functions 1032, 1034 are approximately the same within a tolerance of less than 20 percent in the spatial frequency range comprised between 0 and 5 cycles / degree and in the spatial frequency range comprised between 20 and 30 cycles / degree. The modulation ratio of vertical modulation transfer function 1032 differs from the modulation ratio of vertical modulation transfer function 1034 by at least 10 percent in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0309] FIG. 21 shows a graphical representation of the modulation transfer function calculated over a third region 86 and a fourth region 88 of the first peripheral region of the spectacle lens 70.

[0310] Figure 21 shows the same graph. a horizontal axis profile 1035 of the modulation transfer function calculated over the third region 86 of the spectacle lens 70 (hereinafter referred to as horizontal modulation function 1035), a vertical axis profile 1036 of the modulation transfer function calculated over the third region 86 of the spectacle lens 70 (hereinafter referred to as vertical modulation function 1036), a horizontal axis profile 1037 of the modulation transfer function (hereinafter referred to as horizontal modulation function 1037) calculated over the fourth region 88 of the first peripheral region of the spectacle lens 70, and a vertical axis profile 1038 of the modulation transfer function calculated over the fourth region 88 of the first peripheral region of the spectacle lens 70 (hereinafter referred to as vertical modulation function 1038); Shows.

[0311] Each of horizontal modulation transfer function 1035 and horizontal modulation transfer function 1037 has a value greater than 0.45 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0312] It can also be seen that horizontal modulation transfer function 1035 and horizontal modulation transfer function 1037 each have a value greater than 0.30 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0313] Vertical modulation transfer function 1038 and vertical modulation transfer function 1036 each have a value greater than 0.4 in the spatial frequency range comprised between 0 and 7 cycles / degree, and particularly in the spatial frequency range comprised between 1 and 5 cycles / degree.

[0314] It can also be seen that vertical modulation transfer function 1036 and vertical modulation transfer function 1038 each have a value greater than 0.25 in the spatial frequency range comprised between 15 and 20 cycles / degree.

[0315] Each of the horizontal modulation transfer function 1035 and the horizontal modulation transfer function 1037 indicates a modulation rate.

[0316] 21, the modulation factor of horizontal modulation transfer function 1035 is less than 10 percent different from the modulation factor of horizontal modulation transfer function 1037 in the spatial frequency ranges of 0 to 5 cycles / degree and 20 to 30 cycles / degree. The modulation factor of horizontal modulation transfer function 1035 is more than 10 percent different from the modulation factor of horizontal modulation transfer function 1037 in the spatial frequency ranges of 10 to 15 cycles / degree and 15 to 20 cycles / degree.

[0317] Additionally, vertical modulation transfer function 1036 and vertical modulation transfer function 1038 each indicate a modulation factor.

[0318] 21, the modulation factor of vertical modulation transfer function 1036 is less than 10 percent different from the modulation factor of vertical modulation transfer function 1038 in the spatial frequency range of 0 to 5 cycles / degree. The modulation factor of vertical modulation transfer function 1036 is more than 10 percent different from the modulation factor of vertical modulation transfer function 1038 in the spatial frequency ranges of 10 to 15 cycles / degree and 15 to 20 cycles / degree.

[0319] FIG. 22 shows a graphical representation of the modulation transfer function calculated over a fifth region 90 and a sixth region 92 of the first peripheral region of the spectacle lens 70.

[0320] Figure 22 shows the same graph. a horizontal axis profile 1040 of the modulation transfer function calculated over the fifth region 90 of the spectacle lens 70 (hereinafter referred to as horizontal modulation function 1040), a vertical axis profile 1041 of the modulation transfer function calculated over the fifth region 90 of the spectacle lens 70 (hereinafter referred to as vertical modulation function 1041), a horizontal axis profile 1042 of the modulation transfer function (hereinafter referred to as horizontal modulation function 1042) calculated over the sixth region 92 of the first peripheral region of the spectacle lens 70, and a vertical axis profile 1043 of the modulation transfer function calculated over the sixth region 92 of the first peripheral region of the spectacle lens 70 (hereinafter referred to as vertical modulation function 1043) Shows.

[0321] Each of the horizontal modulation transfer function 1040 and the horizontal modulation transfer function 1042 indicates a modulation rate.

[0322] In FIG. 22, the modulation factor of horizontal modulation transfer function 1040 differs from the modulation factor of horizontal modulation transfer function 1042 by less than 15 percent in spatial frequency ranges between 0 and 30 cycles / degree, typically between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree.

[0323] Therefore, the modulation rates of the horizontal modulation transfer functions 1040, 1042 are approximately the same within a spatial frequency range comprised between 0 and 30 cycles / degree, typically within the spatial frequency ranges comprised between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree, with a tolerance of less than 5 percent.

[0324] In addition, each of the vertical modulation transfer function 1041 and the vertical modulation transfer function 1043 indicates a modulation ratio.

[0325] In FIG. 22, the modulation factor of vertical modulation transfer function 1041 differs from the modulation factor of vertical modulation transfer function 1043 by less than 10 percent in spatial frequency ranges between 0 and 30 cycles / degree, typically between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree.

[0326] Therefore, the modulation rates of the vertical modulation transfer functions 1041, 1043 are approximately the same within a spatial frequency range comprised between 0 and 30 cycles / degree, typically within a spatial frequency range comprised between 0 and 5 cycles / degree, 5 and 10 cycles / degree, 10 and 15 cycles / degree, 15 and 20 cycles / degree, and 20 and 30 cycles / degree, with a tolerance of less than 10 percent.

[0327] How to identify eyeglass lenses The present invention also relates to a computer-implemented method for identifying the spectacle lens disclosed above, which is intended to be worn by a wearer.

[0328] The computer-implemented method is - defining a first region including a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the first region; - defining a second region comprising a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the second region, wherein the first and second regions are different; - specifying the shape, size and location of each of the first and second regions such that the first and second regions have respective modulation transfer functions that provide, for each frequency within a predetermined spatial frequency range, respective modulation ratios that are substantially the same within an error range of less than 40 percent. Includes.

[0329] A first region differs from a second region if at least a portion of the first region is not also a portion of the second region, or if at least a portion of the second region is not also a portion of the first region.

[0330] This applies, for example, to - if the center of the first region is at a different position from the center of the second region, for example if they are spaced apart by at least 0.5 millimeters, - if the shape of the first region is different from the shape of the second region, - if the size of the first region is different from the size of the second region, - If the orientation of the first region is different from the orientation of the second region is.

[0331] Only one of these conditions is necessary to have a first region that is different from a second region. For example, you can have a first region and a second region that are the same shape and size, and the regions will be different if another condition is met, such as if the center of the first region is not in the same location as the center of the second region.

[0332] Typically, the computer-implemented method is performed sequentially by varying the optical characteristics of the micro-optical elements in the first and second regions and comparing the modulation transfer functions of the first and second regions. If the modulation rate of the modulation transfer function of the first region differs by less than 40 percent (preferably less than 20 percent) in a certain spatial frequency range, the optical characteristics of the micro-optical elements in the first and second regions are confirmed to be valid for use as the micro-optical elements in the first and second regions of the eyeglass lens to be manufactured. Once the micro-optical elements in the first and second regions are confirmed to be valid, the computer-implemented process is configured to spatially scan the surface of the optical design of the eyeglass lens by adding a third region (as described above) disposed around the first region and a fourth region (as described above) disposed around the second region. Typically, the identifying step is then performed on the third and fourth regions. Again, two other regions, namely, the fifth and sixth regions, are defined as described above, and then the optical characteristics of these regions are identified in the same way as the first and second regions. Successive regions are thus defined to identify the optical design of the micro-optical elements covering the surface of the eyeglass lens.

[0333] The computer-implemented methods disclosed above are typically used to manufacture eyeglass lenses (i.e., physical lens elements). Typically, the method for manufacturing eyeglass lenses includes: - identifying a design for an eyeglass lens using a computer-implemented method as previously disclosed; - manufacturing the spectacle lens according to the design Includes.

[0334] FIG. 23 shows a computer-implemented method 100 for identifying spectacle lenses 10, 30, 40, 70 as previously disclosed in the first example, second example, third example, fourth example, fifth example, or sixth example.

[0335] The spectacle lenses 10, 30, 40, 70 are intended to be worn by a wearer and are preferably corrective spectacle lenses 10, 30, 40, 70.

[0336] The pair of spectacle lenses 10, 30, 40, 70 are intended to be integrated into a frame 20 of eyeglasses or eyewear as previously disclosed.

[0337] The computer-implemented method 100 comprises: a step E1 of defining a first area 21, 31, 51, 59, 67, 81, the first area 21, 31, 51, 59, 67, 81 including a plurality of micro-optical elements 13, 43, 53, 63, 73 arranged to cover at least 30 percent of the total area of ​​the first area 21, 31, 51, 59, 67, 81; a step E2 of defining a second region 23, 33, 53, 61, 69, 85, the second region 23, 33, 53, 61, 69, 85 comprising a plurality of micro-optical elements 13, 43, 53, 63, 73 arranged to cover at least 30 percent of the total area of ​​the second region 23, 33, 53, 61, 69, 85, wherein the first region 21, 31, 51, 59, 67, 81 and the second region 23, 33, 53, 61, 69, 85 are different; a step E30 of specifying the shape, size and position of each micro-optical element in the first region 21, 31, 51, 59, 67, 81 and in the second region 23, 33, 53 so that the first region has a modulation transfer function and the second region has a modulation transfer function, and the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region for a first predetermined spatial frequency range by less than 40%; Includes.

[0338] In the present disclosure, the method 100 is implemented by a computer. The computer may be a processor, a computing module, or a calculator or computing unit. Typically, a computer includes a processor, a memory, and several input and output interfaces. Thus, the steps of defining E1, defining E2, and identifying E30 may be implemented by a single computing module or by separate computing modules that communicate with each other directly or via a network link.

[0339] Preliminary Step E0 In this example, the method 100 may include a preliminary step E0 of defining a preliminary optical design of a spectacle lens. In this preliminary step E0 of definition, the preliminary lens optical design is adapted to provide the aforementioned macro-optical functions of a spectacle lens having a prescribed refractive power. For example, the preliminary lens optical design includes the geometry of the front or back surface or both surfaces, typically the radii of curvature of one or both surfaces.

[0340] Additionally, the preliminary optical design may define micro-optical elements, which means that the preliminary optical design includes the micro-optical functions already disclosed, and thus includes the preliminary optical design of the micro-optical elements.

[0341] The spare lens optical design is the position and size of the different regions of the spectacle lens (for example the central region and the first and second peripheral regions), - an optical design of the micro-optical elements included in the first peripheral region; - the initial number of micro-optical elements in each region; - below: - refractive power, - the geometry, i.e. the shape of the surface of the micro-optical element, - refractive, diffractive or diffusive optical functions, - focal length, - diameter or size, - position , the initial values ​​of one or more optical characteristics of the micro-optical elements in each region. It may also include.

[0342] Thus, in this example, the preliminary optical design of the spectacle lens includes a central region without micro-optical elements, a first peripheral region (including micro-optical elements), and a second peripheral region without micro-optical elements, as previously disclosed, and also includes a preliminary optical lens design of the micro-optical elements included in the first peripheral region.

[0343] For example, in this step E0, the micro-optical elements can have a size (or diameter) that is fixed between 0.3 mm and 2 mm (for example, any value between 0.3 mm and 2.0 mm, for example, any of the following values: 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90, 1.00, 1.10, 1.20, 1.30, 1.40, 1.50, 1.60, 1.70, 1.80, 1.90, 2.00) when projected onto the face surface (perpendicular to the main axis of the spectacle lens). The diameter of the micro-optical elements can depend on the type of micro-optical element (refractive monofocal or bifocal, spherical or aspherical or toric, diffractive or pi-Fresnel). Specific examples of diameters can be found in European patent application reference EP 3923061 A1, PCT application reference WO 2021 / 198362, PCT application reference WO 2019 / 206569 A1 and PCT application reference WO 2019166653 A1.

[0344] The micro-optical element may be configured to have a spherical refractive power between 1 and 20 diopters, preferably between 1 and 10 diopters.

[0345] The defined micro-optical elements may have a surface shape, such as a prismatic or spherical or aspherical or toroidal surface shape, as disclosed in the previous examples.

[0346] The micro-optical elements may be refractive micro-optical elements, such as monofocal or bifocal micro-optical elements, or in a variant, they may be diffractive bi-Fresnel micro-lenses or diffusive micro-optical elements arranged to scatter light, as already disclosed.

[0347] In fact, in this step E0, the micro-optical elements have the same optical design as in the preliminary optical lens design.

[0348] After defining the preliminary lens optical design of the spectacle lens 10, 30, 40, 70, the method carries out a step E1 of defining the first regions 21, 31, 51, 59, 67, 81 and a step E2 of defining the second regions 23, 33, 53, 61, 69, 85.

[0349] In practice, for the position of the micro-optical elements, the method 100 uses an orthogonal marker (O, x, y, z) whose origin coincides with the geometric center of the spectacle lens 10, 30, 40, 70, whose axes (x, y) are included in the face plane of the projection as already disclosed, and whose axis z coincides with the main visual axis 1 of the spectacle lens.

[0350] Defining step E1 As already disclosed, the defining step E1 makes it possible to define the shape and / or size and / or centre of the first areas 21, 31, 51, 59, 67, 81.

[0351] For example, in the previously disclosed examples, the first regions 21, 31, 51, 59, 67, 81 may have a circular shape.

[0352] In that case, the first regions 21, 31, 51, 59, 67, 81 may have a diameter comprised between 4 mm and 8 mm. For example, this means that the first regions 21, 31, 51, 59, 67, 81 may have a diameter of 4 mm, 5 mm, 6 mm, 7 mm, or 8 mm. This makes it possible to take into account variations in pupil size.

[0353] Additionally, as disclosed in the previous examples, this first region 21, 31, 51, 59, 67, 81 can be centered on the micro-optical axis of the micro-optical element, said micro-optical element being called the reference micro-optical element of the first region. Naturally, in a variant, this first region can be centered at a distance of at least 0.5 mm from the micro-optical axis of the micro-optical element it comprises, said micro-optical element being called the reference micro-optical element of the first region. In fact, in the latter case, the first region 21, 31, 51, 59, 67, 81 can be centered between two adjacent micro-optical elements of the first region, one of the two micro-optical elements corresponding to the reference micro-optical element.

[0354] As disclosed in some examples, a reference micro-optical element of a region has a spatial location on the lens element, where the reference micro-optical element is included in a first peripheral region of the spectacle lens, which means that the reference micro-optical element is not centered on the center of the spectacle lens.

[0355] Defining step E2 Similarly, in the defining step E2, the shape and / or size and / or centre of the second region 23, 33, 53, 61, 69, 85 can be defined.

[0356] For example, in the previously disclosed examples, the second regions 23, 33, 53, 61, 69, 85 may have a circular shape.

[0357] In that case, the second regions 23, 33, 53, 61, 69, 85 may have a diameter comprised between 4 mm and 8 mm, which means, for example, that the second regions 23, 33, 53, 61, 69, 85 may have a diameter of 4 mm, or 5 mm, or 6 mm, or 7 mm, or 8 mm.

[0358] Additionally, as disclosed in the previous examples, this second region 23, 33, 53, 61, 69, 85 can be centered on the micro-optical axis of the micro-optical element, said micro-optical element being called the reference micro-optical element of the second region. Naturally, in a variant, this second region can be centered at a center offset by at least 0.5 mm from the micro-optical axis of the micro-optical element it comprises, said micro-optical element being called the reference micro-optical element of the second region. In fact, in the latter case, the second region 23, 33, 53, 61, 69, 85 can be centered between two adjacent micro-optical elements of the second region, one of the two micro-optical elements corresponding to the reference micro-optical element.

[0359] In the present disclosure, the second regions 23, 33, 53, 61, 69, 85 are different from the first regions 21, 31, 51, 59, 67, 81 as previously disclosed.

[0360] For example, in the first example, the second region 23 includes a center u23, which has a spatial position on the spectacle lens 20 different from the spatial position of the center u1 of the first region 21. Typically, in this example, the second region 23 is centered between two micro-optical elements 13, with optical element 13a corresponding to the reference micro-optical element. In other words, this means that the center of the second region 23 is offset from the center of the first region by a certain distance, defined here by the spacing between two adjacent rings.

[0361] By this configuration, this means that the method according to the invention uses two areas with different spatial positions on the spectacle lens 10 to improve the specification of the optical lens design of the spectacle lens. Indeed, the optical lens design of the spectacle lens can be designed more accurately, improving the vision correction, visual acuity and myopia discomfort and progression control of the lens design obtained by the method according to the present disclosure.

[0362] As shown in the third, fourth, and fifth examples, the distance between the center of the first region 31, 51, 59, 67, 81 and the center of the second region 33, 53, 61, 69, 85 can be defined as the space between two adjacent micro-optical elements. In this case, the first region 31, 51, 59, 67, 81 can be centered on the micro-optical element, and the second region 33, 53, 61, 69, 85 can be centered on a point located between the two adjacent micro-optical elements. In a preferred embodiment, one of the two micro-optical elements is the micro-optical element on which the first region 31, 51, 59, 67, 81 is centered. This arrangement makes it easy to locate the two regions while, as already disclosed, making it possible to obtain an optical lens design with good optical performance.

[0363] In the previously disclosed example, the first and second regions are of the same size, here both having a diameter of 4 mm, but have different spatial positions on the spectacle lens.

[0364] Of course, in a variant, the first regions 21, 31, 51, 59, 67, 81 and the second regions 23, 33, 53, 61, 69, 85 may be concentric, and in that case, the size (here, diameter if circular) of the first regions 21, 31, 51, 59, 67, 81 may therefore differ from the size (here, diameter) of the second regions 23, 33, 53, 61, 69, 85.

[0365] For this variation, the first regions 21, 31, 51, 59, 67, 81 may be 4 mm in diameter, while the fourth regions 23, 33, 53, 61, 69, 85 may be 6 mm in diameter or 8 mm in diameter.

[0366] Identifying step E3 In an identification step E3, the shape and / or size and / or position of each micro-optical element in the first regions 21, 31, 51, 59, 67, 81 and the shape and / or size and / or position of each micro-optical element in the second regions 23, 33, 53, 61, 69, 85 are identified.

[0367] In practice, in the identification step E3, for the optical lens design of the spectacle lens 10, 30, 40, 70, a modulation transfer function is calculated over the first region 21, 31, 51, 59, 67, 81 and a modulation transfer function is calculated over the second region 23, 33, 53, 61, 69, 85. The modulation transfer function of the first region 21, 31, 51, 59, 67, 81 is then compared with the modulation transfer function of the second region 23, 33, 53, 61, 69, 85.

[0368] In practice, the modulation transfer functions of the first regions 21, 31, 51, 59, 67, 81 and the modulation transfer functions of the second regions 23, 33, 53, 61, 69, 8 are compared in at least one particular range of spatial frequencies.

[0369] In one embodiment, the modulation transfer functions of the two regions are compared in two specific frequency ranges, denoted as the first and second predetermined spatial frequency ranges below. For example, on the one hand, for a first specific spatial frequency range, it is compared whether the difference between the value of the modulation transfer function of the first region 21, 31, 51, 59, 67, 81 and the value of the modulation transfer function of the second region 23, 33, 53, 61, 69, 8 is less than a first level, which in this example is fixed at 40% (or preferably fixed at 20%) and corresponds to a certain criterion (hereinafter referred to as the first criterion). It should be noted that the two modulation transfer function values ​​compared in the determination step E3 are values ​​associated with the same spatial frequency.

[0370] On the other hand, for a second predetermined spatial frequency range, the values ​​of the modulation transfer functions of the first regions 21, 31, 51, 59, 67, 81 are compared to the values ​​of the modulation transfer functions of the second regions 23, 33, 53, 61, 69, 8 to see if their difference is greater than a second level, which here is fixed at 10% and corresponds to a reference (hereinafter referred to as the second reference).

[0371] In practice, the first spatial frequency range may, for example, be comprised between 1 and 5 cycles / degree and the second spatial frequency range between 15 and 20 cycles / degree, or the second spatial frequency range may be comprised between 1 and 5 cycles / degree and the first spatial frequency range between 15 and 20 cycles / degree.

[0372] Typically, the selection of a particular range of spatial frequencies allows the optical design of spectacle lenses to be optimized for a particular visual task, such as reading. Typically, low spatial frequencies (i.e., less than 10 cycles / degree) allow the reader to easily see the general shapes of words, words, and lines, while higher spatial frequencies (greater than 10 cycles / degree) allow the reader to see the details of words, such as the exact shape and position of letters, which are used to grasp the meaning of words and sentences.

[0373] Of course, modulation transfer functions can be calculated and compared for other spatial frequency ranges, as disclosed in the previous examples.

[0374] In one embodiment, the first predetermined spatial frequency ranges are similar, making it possible to define two criteria for the same spatial frequency range, improving the identification of the optical design of the micro-optical elements in the first and second regions.

[0375] In the method 100, if the modulation transfer function value of the first region 21, 31, 51, 59, 67, 81 obtained for a first predetermined spatial frequency range differs from the modulation transfer function value of the second region 23, 33, 53, 61, 69, 8 by more than 40%, the optical characteristics of the micro-optical elements of at least one of the regions are changed. For a given region, the computer can change the optical characteristics of each micro-optical element of a given region individually, or can change at least some of the optical characteristics of the micro-optical elements within a given region simultaneously. This means that the adjustment can be performed individually or for multiple micro-optical elements within a given region.

[0376] For example, this means that the size and / or shape and / or position of the micro-optical elements in the first regions 21, 31, 51, 59, 67, 81 are changed, while the shape, size and position of the micro-optical elements in the second regions 23, 33, 53, 61, 69, 85 are maintained. In a preferred embodiment, the size and / or shape and / or position of the micro-optical elements in the second regions 23, 33, 53, 61, 69, 85 and in the first regions 21, 31, 51, 59, 67, 81 are changed.

[0377] This adjustment of the optical characteristics of the micro-optical elements in the first regions 21, 31, 51, 59, 67, 81 and in the second regions 23, 33, 53, 61, 69, 85 can be different or, in preferred embodiments, similar. This means that the computer changes the optical characteristics of the micro-optical elements in the first and second regions in the same way. This makes it possible to obtain a uniform optical lens design for the spectacle lens.

[0378] In contrast, if the difference between the modulation transfer function values ​​of the first region 21, 31, 51, 59, 67, 81 obtained for the first predetermined spatial frequency range and the modulation transfer function values ​​of the second region 23, 33, 53, 61, 69, 85 is less than 40% (or less than 20%), this means that the first criterion (here corresponding to 40% or 20%) has been reached. The identification step E30 stops if a second predetermined spatial frequency range is not defined. In that case, the computer compares the two modulation transfer function values ​​in the second predetermined spatial frequency range.

[0379] For example, if the difference between the modulation transfer function values ​​of the first regions 21, 31, 51, 59, 67, 81 and the modulation transfer function values ​​of the second regions 23, 33, 53, 61, 69, 85 obtained for a second predetermined spatial frequency range is less than 10%, the optical characteristics of at least one micro-optical element in these regions is modified. In contrast, if the difference between the modulation transfer function values ​​of the first regions 21, 31, 51, 59, 67, 81 and the modulation transfer function values ​​of the second regions 23, 33, 53, 61, 69, 85 obtained for a second predetermined spatial frequency range is less than 10%, this means that the second criterion (here corresponding to 10%) has been reached. The identification step E30 stops.

[0380] Thus, according to one embodiment, this means that the step of identifying E30 functions as an iterative process, i) a step E31 of identifying modifications to the first areas 21, 31, 51, 59, 67, 81 and the second areas 23, 33, 53, 61, 69, 85; ii) a step E32 of checking whether, for a first predetermined spatial frequency range, a comparison of the values ​​of the modulation transfer function of the first region 21, 31, 51, 59, 67, 81 with the values ​​of the modulation transfer function of the second region 23, 33, 53, 61, 69, 85 meets a first criterion and / or whether, for a second predetermined spatial frequency range, a comparison of the values ​​of the modulation transfer function of the first region 21, 31, 51, 59, 67, 81 with the values ​​of the modulation transfer function of the second region 23, 33, 53, 61, 69, 85 meets a second criterion; - if the first criterion is not met and / or the second criterion is not met, ii1) adjusting (also referred to as modifying) the shape and / or size and / or position of the micro-optical elements of the first area 21, 31, 51, 59, 67, 81, and / or ii2) adjusting (also referred to as changing) the shape and / or size and / or position of the micro-optical elements of the second area 23, 33, 53, 61, 69, 85; ii3) repeating steps E31 and E32; may include:

[0381] The iterative optimization process in the present disclosure is an iterative loop in which an optimization method, such as gradient descent or Newton's algorithm, is used to find optical characteristics of the micro-optical elements in the first regions 21, 31, 51, 59, 67, 81 and in the second regions 23, 33, 53, 61, 69, 85 that meet criteria defined in the iterative optimization process.

[0382] In the adjustment step applied to the first region 21, 31, 51, 59, 67, 81 and the second region 23, 33, 53, 61, 69, 85, the values ​​of the optical characteristics (here, shape and / or size and / or position) of the micro-optical elements of the first and second regions are changed to different values. For example, the optical characteristics are adjusted by, for example, decreasing or increasing the current optical characteristic value in increments of 0.1 or 0.5. In some embodiments, the size, shape, and position adjustments can be randomly generated or automatically determined by programming a gradient descent or Newton's algorithm in this way. This makes it possible to find the most appropriate values ​​of the optical characteristics of the micro-optical elements of the first region 21, 31, 51, 59, 67, 81 or the second region 23, 33, 53, 61, 69, 85.

[0383] In the present disclosure, the optical characteristics of the micro-optical elements that are adjusted include the size, shape, and / or position of the micro-optical elements within the region. However, it can also include other optical characteristics, such as the refractive power, refractive, diffractive or diffractive optical function, focal length, etc. of the micro-optical elements in a region. Additionally or alternatively, it can be the density of the micro-optical elements defined in the first region 21, 31, 51, 59, 67, 81 and / or the second region, which can be changed in the adjusting step. In one embodiment, the computer is configured to first identify or change the size, position, and then shape of the micro-optical elements in a region. The computer can then change the density, refractive power, focal length, diffractive or diffractive optical function, etc. of the micro-optical elements in a region.

[0384] As mentioned above, each criterion here is a threshold, here defined as 40% (or 20%) for the first criterion or 10% for the second criterion, which therefore means that in the checking step, once the first criterion and optionally the second criterion are reached, the identifying step E30 stops.

[0385] Additionally, the optimization process may include a stopping criterion corresponding to the number of iterations in addition to the first and / or second criteria already described. The stopping criterion corresponds to an additional criterion and is used in conjunction with the aforementioned criteria. The stopping criterion allows the iterative optimization process to be stopped if at least one of the aforementioned criteria is not met, in this case, if a threshold is not reached. As a non-limiting example, the number of iterations may be set, for example, between 10 and 2000 (e.g., between 10 and 100) when the first regions 21, 31, 51, 59, 67, 81 and the second region are defined. In an embodiment of the iterative optimization process, the optimization process terminates when the current iteration reaches the set number of iterations, even if at least one of the aforementioned criteria is not met.

[0386] In the checking step E32, if at least one of the criteria is not fulfilled, the adjusting (or modifying) step (contained in the checking step E32) and steps E31, E32 are repeated until at least one (preferably two) criteria are fulfilled.

[0387] In one embodiment, for the second spatial frequency range, the identifying step can stop if the second criterion is not reached, which in practice would then mean that the modulation transfer function of the first region 21, 31, 51, 59, 67, 81 is approximately the same as the modulation transfer function of the second region.

[0388] In the method 100, the optimization loop of the identification step E30 is terminated if at least one of the criteria is met, for example if the result of the comparison is below or above a predefined threshold or if the current iteration has reached a set number of iterations. This means that the micro-optical elements comprised in the first region 21, 31, 51, 59, 67, 81 have the identified optical characteristics at the end of the checking step of the identification step E3. Similarly, it means that the optical characteristics of the micro-optical elements comprised in the second region have the identified optical characteristics at the end of the checking step of the identification step E3.

[0389] Iteration In one embodiment, the method 100 can also perform other steps to spatially scan the surface of the spectacle lens 10, 30, 40, 70. For example, the method 100 can include a step E111 of defining a first further region and / or a step E222 of defining a second further region, which are performed in a similar manner to the defining steps E1 and E2 already described.

[0390] In a defining step E111, the computer defines a first other region on the optical lens design of the spectacle lens, said first other region being different from the first region, the second region and the second other region. Similarly, in a defining step E222, the computer defines a second other region on the optical lens design of the spectacle lens, said second other region being different from the second region, the first region and the first other region.

[0391] In fact, this new area, called the first other area, has the following characteristics: the center of the first other region is at a different position than the center of the second other region and / or the center of the first region and / or the center of the second region, for example they may be spaced apart by at least 0.5 millimeters, - the shape of the first other region is different from the shape of the second other region and / or the first region and / or the second region; - the size of the first other region is different from the size of the second other region and / or from the size of the first region and / or from the size of the second region; - the orientation of the first other region is different from the orientation of the second other region and / or the first region and / or the second region; means that it contains at least one of the following:

[0392] The same applies to the second other area.

[0393] For example, the first other region is - the third or fifth region disclosed in the second and sixth examples, or - The third region of the third, fourth, or fifth example It is understood that the above equation can correspond to the following equation:

[0394] Similarly, the second other region is - the fourth or sixth region disclosed in the second and sixth examples, or - The third area of ​​the third, fourth and fifth examples It is understood that the above equation can correspond to the following equation:

[0395] It can be seen that in the second and sixth examples, two other new regions are defined and the computer therefore carries out steps E111 and E222.

[0396] The computer then repeats a new identification step E300 to identify the optical characteristics of the micro-optical elements in the first other region and / or the second other region, which step E300 is performed in the same way as the previous identification step.

[0397] In practice, once the two new regions have been defined, in the identifying step E300 the computer calculates for the first other region and for the second other region (identifying step E331) the iterative process already disclosed. This means that the computer calculates the modulation transfer function of the first other region and the modulation transfer function of the second other region in a calculating step, and then compares (in a checking step E332) the values ​​of the two identified modulation transfer functions in the first predetermined spatial frequency range and / or the second predetermined spatial frequency range.

[0398] In the checking step E332, if the first criterion and / or the second criterion are not fulfilled, the computer adjusts the shape and / or position and / or size of the two new regions and repeats the identifying step E331 and the checking step E332 until at least one of the criteria is fulfilled.

[0399] In step E332 of checking, if the first criterion and / or the second criterion is / are fulfilled, steps E111, E222 and E300 are repeated with a new first other region and a new second other region. Typically, this new first other region may correspond to the fifth region of the second and sixth examples, while this new second other region may correspond to the sixth region of the second and sixth examples.

[0400] Such a method allows spatial scanning of the optical design of a spectacle lens, thus taking into account all parameters of the spectacle lens (radius of curvature, spectacle lens prescription, etc.), thereby making it possible to obtain a final lens design of the spectacle lens that is fully optimized and very homogeneous over the entire surface of the spectacle lens, thereby improving the desired optical qualities and specificity of such a design.

[0401] It can be seen that in the third, fourth and fifth examples only new other regions are defined and therefore the defining step E111 is calculated.

[0402] If only one new region is defined (denoted as the first other region), then in the identifying step E300 the computer carries out the iterative process already disclosed for the first other region and the first region or the second region, which means that the computer calculates the modulation transfer function of the first region or the second region and the modulation transfer function of the first other region in a calculating step, and then (in a checking step) compares the values ​​of the two identified modulation transfer functions in the first spatial frequency range and / or the second spatial frequency range.

[0403] If the first criterion and / or the second criterion are not met, the computer adjusts the shape and / or position and / or size of the first other region and the first or second region, and then repeats the identifying and checking steps until at least one of the criteria is met.

[0404] Therefore, in this embodiment, the optical design of the spectacle lens is determined from at least three different regions, and therefore, in this embodiment, the lens design of the spectacle lens can be determined more quickly, while obtaining a spectacle lens with a good trade-off between visual acuity and myopic discomfort.

[0405] Of course, the identifying step E300 can be repeated in new, other areas to scan the surface of the spectacle lens more accurately.

[0406] Once the iterative process is complete, the design of the micro-optical elements within the calculated region is fixed.

[0407] In one embodiment, the computer assigns the identified optical characteristics at the end of the identifying step E30 or E300 to all the micro-optical elements of the eyeglass lens, since the adjustment of the optical characteristics of the micro-optical elements is similar for different areas.

[0408] The method 100 makes it possible to obtain a lens design for each micro-optical element on the surface of a spectacle lens. The lens design of the micro-optical elements is optimized in different areas of the spectacle lens. This makes it possible to take into account other parameters in the optimization process, such as the radius of curvature, the variation in focus of the spectacle lens, the refractive correction of the spectacle lens, etc.

[0409] Of course, the method 100 may also include a step E5 of providing a final lens design of the spectacle lens. In this example, the final lens design of the spectacle lens is based on the values ​​of the optical characteristics of the micro-optical elements identified for all regions calculated in the optimization process. It may also be based on a preliminary lens optical design (for example, by taking into account the macro-optical functions of the spectacle lens and / or the geometry of the spectacle lens and / or the positions and / or sizes and shapes of the first, second and third regions, etc.). This final lens design corresponds to the optical design of the spectacle lens intended to be worn by the wearer.

[0410] Manufacturing Steps 24 shows a method 200 for manufacturing an eyeglass lens (i.e., a physical lens element) intended for wear by a wearer. This eyeglass lens can be mounted in a frame 20, as shown in FIG.

[0411] The method 200 includes all of the steps of the previously disclosed method 100. Typically, the method 200 for manufacturing eyeglass lenses includes: a step E1111 of identifying a design for an eyeglass lens using a computer-implemented method that uses the method 100 previously disclosed, - Step E1112 of manufacturing eyeglass lenses according to the design Includes. [Explanation of symbols]

[0412] 10 Corrective eyeglass lenses 11 Front face, convex front face 12 Posterior surface, concave posterior surface 13 Micro-optical elements 14 Central area 15 First Periphery 16 Second Periphery 17 Contour, circular contour 18 Contour, Circular Contour 19 Contour, circular contour 20 frames 21 The First Region 22 Outer contour 23 The Second Realm 24 Outer contour

Claims

1. at least, a first region including a plurality of micro-optical elements arranged to cover at least 30 percent of the total area of ​​said first region; a second region comprising a plurality of micro-optical elements arranged to cover at least 30 percent of the total area of ​​said second region; 1. A spectacle lens comprising: a first region different from a second region; and wherein the micro-optical elements of the first and second regions are arranged such that, for a predetermined spatial frequency range, a value of a modulation transfer function of the first region differs from a value of a modulation transfer function of the second region by less than 40%.

2. the predetermined spatial frequency range is a predetermined first spatial frequency range; 2. The spectacle lens of claim 1, wherein the micro-optical elements of the first region and the micro-optical elements of the second region are arranged such that, for a predetermined second spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region by more than 10%.

3. the first spatial frequency range is comprised between 1 and 5 cycles / degree and the second spatial frequency range is comprised between 15 and 20 cycles / degree, or The spectacle lens according to claim 2, wherein said second spatial frequency range is comprised between 1 and 5 cycles / degree and said first spatial frequency range is comprised between 15 and 20 cycles / degree.

4. 2. The spectacle lens according to claim 1, wherein the projection of the first area onto a plane perpendicular to the optical axis of the spectacle lens presents a circular contour and has a diameter comprised between 2 and 20 millimeters.

5. 2. The spectacle lens according to claim 1, wherein the projection of the second area onto a plane perpendicular to the optical axis of the spectacle lens presents a circular contour and has a diameter comprised between 2 and 20 millimeters.

6. The spectacle lens according to claim 1 , wherein a projection of the first area onto a plane perpendicular to an optical axis of the spectacle lens and a projection of the second area onto the plane have different shapes or different sizes.

7. The spectacle lens according to claim 1 , wherein the projection of the first region onto a plane perpendicular to the optical axis of the spectacle lens and the projection of the second region onto the plane are concentric.

8. 2. The spectacle lens of claim 1, wherein a geometric center of a projection of the first region onto a plane perpendicular to an optical axis of the spectacle lens is spaced at least 0.5 millimeters from a geometric center of a projection of the second region onto the plane.

9. the density of the micro-optical elements in the first region differs from the density of the micro-optical elements in the second region by less than 5%; and / or the mean refractive power of at least one of the micro-optical elements of the first region is different from the mean refractive power of at least one of the micro-optical elements of the second region, and / or at least one optical function of the micro-optical elements of the first area is different from the at least one optical function of the micro-optical elements of the second area, and / or The spectacle lens according to claim 1, wherein the diameter of at least one of the micro-optical elements in the first region differs from the diameter of at least one of the micro-optical elements in the second region by less than 5%.

10. for a spatial frequency of 1 to 5 cycles / degree, the value of the modulation transfer function of the first region is greater than 0.3, e.g., greater than 0.4 or greater than 0.5; and for a spatial frequency of 15 to 20 cycles / degree, the value of the modulation transfer function of the first region is greater than 0.05, e.g., greater than 0.1, e.g., greater than 0.5; and / or for the spatial frequency of 1 to 5 cycles / degree, the value of the modulation transfer function of the second region is greater than 0.3, e.g., greater than 0.4 or greater than 0.5; and 2. The spectacle lens of claim 1, wherein for spatial frequencies between 15 and 20 cycles / degree, the value of the modulation transfer function of the second region is greater than 0.05, such as greater than 0.1, such as greater than 0.

5.

11. 2. The spectacle lens according to claim 1, wherein at least one of the micro-optical elements of the first region has a mean refractive power value comprised between 1 diopter and 10 diopters and / or at least one of the micro-optical elements of the second region has a mean refractive power value comprised between 1 diopter and 10 diopters.

12. the micro-optical elements in the first region are arranged according to a first pattern comprising at least two first concentric rings of micro-optical elements, a first of the at least two first concentric rings being spaced apart from a second of the at least two first concentric rings by at least 1 millimeter; and / or 10. The spectacle lens of claim 1, wherein the micro-optical elements in the second region are arranged according to a second pattern comprising at least two second concentric rings of micro-optical elements, a first of the at least two second concentric rings being spaced apart from a second of the at least two second concentric rings by at least 1 millimeter.

13. 1. A computer-implemented method for identifying an eyeglass lens intended for wearer's eye, comprising: - defining a first region comprising a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​said first region; - defining a second region comprising a plurality of micro-optical elements arranged to cover at least 30 percent of a total area of ​​the second region, the first region being different from the second region; - specifying the shape, size and position of each micro-optical element in the first and second regions such that the first region has a modulation transfer function and the second region has a modulation transfer function, and for a first predetermined spatial frequency range, the value of the modulation transfer function of the first region differs from the value of the modulation transfer function of the second region by less than 40%.

10. A computer-implemented method comprising:

14. The first region comprises the following elements: the center of the first region is at a different position than the center of the second region; the shape of the first region is different from the shape of the second region; the size of said first region is different from the size of said second region; the orientation of the first region is different from the orientation of the second region; 14. The computer-implemented method of claim 13, wherein the first region differs from the second region by at least one of:

15. 14. The computer-implemented method of claim 13, wherein if the value of the modulation transfer function of the first region differs by more than 40 percent from the value of the modulation transfer function of the second region for the first predetermined spatial frequency range, the identifying step comprises modifying optical characteristics of the micro-optical elements in the first region and the second region.

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