Lens element

Abstract

To provide a lens element that inhibits or at least slow down the progression of abnormal refraction of an eye such as myopia or hyperopia.SOLUTION: A lens element intended to be worn in front of an eye of a wearer comprises: a prescription portion configured to provide the wearer in standard wearing conditions with a first optical function based on the prescription of the wearer for correcting abnormal refraction of the eye of the wearer; and a plurality of contiguous optical elements, where each optical element has a simultaneously bifocal optical function that provides simultaneously: a second optical function in standard wearing conditions; and a third optical function of not focusing an image on the retina of the eye in the standard wearing conditions so as to slow down the progression of the abnormal refraction of the eye.SELECTED DRAWING: Figure 1a

Description

[Technical Field]

[0001] The present invention relates to a lens element intended to be worn in front of a person's eye to inhibit the progression of an ocular refractive error, such as myopia or hyperopia. [Background technology]

[0002] Myopia of the eye is characterized by the eye imaging distant objects in front of the retina. Myopia is usually corrected using concave lenses, and hyperopia is usually corrected using convex lenses.

[0003] It has been observed that some individuals, particularly children, when corrected using conventional single vision optical lenses, image inaccurately when viewing objects at close distances, i.e., in near vision situations. Due to this imaging defect on the part of myopic children who are corrected for distance vision, the image of the near object is also formed behind the retina, even in the foveal area.

[0004] Such imaging defects may affect the progression of myopia in such individuals: in most of the individuals, it may be observed that the myopic defect increases over time. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] Eyal BenEliezer, Emanuel Marom, Naim Konforti, and Zeev Zalevsky, Experimental realization of an imaging system with an extended depth of field, Appl.Opt., 44(14):2792-2798, May 2005 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, there appears to be a need for a lens element that inhibits or at least slows the progression of refractive errors of the eye, such as myopia or hyperopia. [Means for solving the problem]

[0007] To this end, the invention provides a lens element intended to be worn in front of a wearer's eye, comprising: - a prescription portion configured to provide the wearer with a first refractive power based on the wearer's prescription that corrects anomalous refraction of said eye of the wearer under standard wearing conditions; and a plurality of successive optical elements; Equipped with Each optical element is - Second optical function and - A third optical function that does not form an image on the retina of the eye under the standard wearing condition, thereby slowing down the progression of abnormal refraction of the eye. A lens element is proposed that has simultaneous bifocal optical functions that simultaneously provide:

[0008] Advantageously, having multiple consecutive optical elements that simultaneously provide second and third optical functions makes it possible to have an easily constructed lens element that has a portion of the optical focus on the wearer's retina and a portion of the optical focus either in front of or behind the wearer's retina, thereby slowing the progression of refractive abnormalities of the eye, such as myopia or hyperopia.

[0009] Potentially, a lens element according to the present invention may further allow for the ability to select the portions of light that should be focused on the retina and the portions of light that should not be focused on the retina of the eye.

[0010] According to further embodiments, which may be considered alone or in combination, - the refractive power of the second optical function in standard wear is 0.25 diopters or less; and / or - each optical element has an optical axis; and / or - the lens element is a rimmed lens element intended to be mounted in an eyeglass frame, the entire surface of at least one face of the lens element being covered with a plurality of continuous optical elements; and / or - at least a portion of the prescription portion, for example a zone of the prescription portion around the optical center of the lens element, does not contain an optical element; and / or - the prescription portion is formed as a portion other than a portion formed as a plurality of optical elements; and / or - at least some, e.g. all, of the optical elements are arranged in a predefined array, e.g. a square array or a hexagonal array, on at least one of the surfaces of the lens element; and / or at least some, e.g. all, of the optical elements are arranged along a plurality of concentric rings; and / or at least part of the optical element, e.g. all of it, is arranged in front of the lens element; and / or at least part of the optical element, e.g. all of it, is arranged behind the lens element; and / or at least part, e.g. all, of the optical element is located between the front and back surfaces of the lens element; and / or at least part of the optical element, e.g. all of it, is made of a birefringent material; and / or at least some, for example all, of the optical elements are diffractive lenses; and / or at least some, for example all, of the optical elements are π-Fresnel lenses; and / or at least a portion, e.g., all, of the diffractive lens comprises a Metasurface structure; and / or at least some, for example all, of the optical elements are multifocal binary components; and / or at least some, for example all, of the optical elements are pixelated lenses; and / or - the difference between the refractive power of the second optical feature and the refractive power of the third optical feature is 0.5 D or more; and / or - the difference between the refractive power of the first optical feature and the refractive power of the third optical feature is 0.5 D or more; and / or - at least one, e.g. all, of the optical elements have a shape configured to produce a focal plane in front of the retina of the human eye; and / or at least some, e.g. all, of the optical elements have optical functions that include high-order optical aberrations; and / or The lens element comprises an ophthalmic lens having a prescription portion and a clip-on having a plurality of successive optical elements configured to be removably attached to the ophthalmic lens when the lens element is worn.

[0011] The present invention also relates to a method for providing a lens element according to the invention intended to be worn on the eye of a wearer, said method comprising the steps of: - providing a lens element configured to provide a wearer with a first refractive power based on the wearer's prescription that corrects ametropia of said eye of the wearer under normal wear conditions; - providing an optical patch comprising a plurality of continuous optical elements; - forming a lens element by placing an optical patch on one of the front or back surfaces of a lens member; Including, Each optical element, when the patch is disposed on one of the front or back surfaces of the lens member, - Second optical function and - A third optical function that does not form an image on the retina of the eye under the standard wearing condition, thereby slowing down the progression of abnormal refraction of the eye. and an optical axis, for example.

[0012] The present invention further relates to a method for providing a lens element intended to be worn in front of an eye of a wearer according to the present invention, said method comprising the steps of casting a lens element, and during the casting step, when said lens element is worn in front of said eye of a wearer: - Second optical function and - A third optical function that does not form an image on the retina of the eye under the standard wearing condition, thereby slowing down the progression of abnormal refraction of the eye. and providing an optical patch including a plurality of successive optical elements each having an optical axis, the simultaneous bifocal optical function simultaneously providing

[0013] Non-limiting embodiments of the present invention will now be described with reference to the accompanying drawings. [Brief explanation of the drawings]

[0014] [Figure 1a] FIG. 1 is a plan view of a lens element according to the present invention. [Figure 1b] 1 is a general side view of a lens element according to the present invention; [Figure 2] FIG. 1 illustrates an example of a lens element covered by multiple successive Fresnel-type optical elements. [Figure 3] FIG. 3 is a diagram illustrating an example of a radial profile of a first diffractive lens. [Figure 4] FIG. 10 is a diagram illustrating an example of a radial profile of a second diffractive lens. [Figure 5] FIG. 1 is a diagram illustrating an example of a radial profile of a π-Fresnel lens. [Figure 6a] FIG. 1 shows the diffraction efficiency of a π Fresnel lens profile as a function of wavelength. [Figure 6b] FIG. 1 shows the diffraction efficiency of a π Fresnel lens profile as a function of wavelength. [Figure 7a] FIG. 1 illustrates a binary lens embodiment of the present invention. [Figure 7b] FIG. 1 illustrates a binary lens embodiment of the present invention. [Figure 7c] FIG. 1 illustrates a binary lens embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] Elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help to improve understanding of embodiments of the present invention.

[0016] The present invention relates to lens elements, particularly lens elements intended to be worn in front of a person's eyes.

[0017] In the remainder of the description, terms such as "top," "bottom," "horizontal," "vertical," "superior," "inferior," "front," "rear," or other terms indicating relative positions may be used, and these terms should be understood in the context of the wear of the lens elements.

[0018] In the context of the present invention, the term "lens element" can refer to a contact lens, an uncut optical lens, an eyeglass optical lens with an edge that fits into a specific eyeglass frame, or an ophthalmic lens and an optical device configured to be positioned on the ophthalmic lens. The optical device can be located on the front or back surface of the ophthalmic lens. The optical device can be an optical patch. The optical device can be configured to be removably positioned on the ophthalmic lens, for example, a clip configured to be clipped onto an eyeglass frame having an ophthalmic lens.

[0019] The lens element 10 according to the present invention is configured for use on a person and is intended to be worn in front of said person's eyes.

[0020] As shown in FIG. 1a, a lens element 10 according to the present invention includes: - prescription part 12, - a plurality of successive optical elements 14; Equipped with.

[0021] The prescription portion 12 is configured to provide a wearer in a standard wearing situation with a first optical function based on the wearer's eye prescription that corrects the ametropia of the wearer's eye.

[0022] Wearing conditions are to be understood as the position of the lens elements relative to the wearer's eye, defined, for example, by the angle of view during wearing, the cornea-lens distance, the pupil-cornea distance, the center of rotation (CRE)-pupil distance, the CRE-lens distance, and the curvature angle.

[0023] The cornea-lens distance is the distance along the visual axis of the eye in the primary eye position (usually interpreted as horizontal) between the cornea and the back surface of the lens, and is equal to, for example, 12 mm.

[0024] The pupil-corneal distance is the distance along the visual axis of the eye between the pupil and the cornea and is usually equal to 2 mm.

[0025] The CRE-pupillary distance is the distance along the visual axis of the eye between the center of rotation of the eye (CRE) and the cornea, and is equal to, for example, 11.5 mm.

[0026] The CRE-lens distance is the distance along the visual axis of the eye in the primary eye position (usually interpreted as horizontal) between the CRE of the eye and the back surface of the lens, and is equal to, for example, 25.5 mm.

[0027] The angle of view when worn is the angle in the vertical plane at the intersection of the normal to the back surface of the lens and the visual axis of the eye in the first eye position (usually interpreted as horizontal), which is the intersection of the normal to the back surface of the lens and the visual axis of the eye in the first eye position, and is, for example, equal to -8°.

[0028] The curvature angle is the angle in the horizontal plane at the intersection of the normal to the back surface of the lens and the visual axis of the eye in the first eye position (usually interpreted as horizontal), e.g., equal to 0°.

[0029] An example of a standard wearing situation can be defined by a pre-eye angle of −8°, a cornea-lens distance of 12 mm, a pupil-cornea distance of 2 mm, a CRE-pupillary distance of 11.5 mm, a CRE-lens distance of 25.5 mm, and a curvature angle of 0°.

[0030] The term "prescription" is understood to mean a set of optical properties, for example, refractive power, astigmatism, and prismatic light blur, determined by an ophthalmologist or optometrist to correct the wearer's visual defects by means of lenses placed in front of the eye. For example, a prescription for a myopic eye has a value for refractive power and a value for astigmatism with respect to the axis of distance vision.

[0031] Each optical element 14 of the plurality of successive optical elements has a simultaneous bifocal optical function and, for example, an optical axis.

[0032] The optical function of each optical element 14 may be different from one another.

[0033] Simultaneous bifocal optical function - Second optical function and - A third optical function that does not form an image on the retina of the eye under the standard wearing condition, thereby slowing down the progression of abnormal refraction of the eye. are provided simultaneously.

[0034] The second and third optical functions differ at least in that the refractive powers they provide differ from each other. In the sense of the present invention, two refractive powers are different if the absolute value of the difference between these two refractive powers is 0.1 D or more.

[0035] In the context of the present invention, two optical elements should be considered consecutive if there is a path linking them that can measure, in a standard wearing situation, at least one refractive power different from the refractive power based on the wearer's prescription that corrects the anomalous refraction of the wearer's eye.

[0036] Each optical element of the plurality of contiguous optical elements is transparent across the visible spectrum.

[0037] As shown in FIG. 1b, the lens element 10 according to the present invention comprises an object-side surface F1, which may be formed, for example, as a convex curved surface facing the object side, and an eye-side surface F2, which may be formed, for example, as a concave surface having a curvature different from that of the object-side surface F1.

[0038] According to an embodiment of the present invention, at least part, for example all, of the continuous optical element is disposed in front of the lens element.

[0039] At least a portion, for example all, of the continuous optical element may be disposed on the back surface of the ophthalmic lens.

[0040] At least a portion, for example all, of the continuous optical element may be disposed between the front and back surfaces of the lens element, for example, the lens element may include zones of different refractive index that form the continuous optical element.

[0041] According to an embodiment of the present invention, the lens element may comprise an ophthalmic lens having a refractive area and a clip-on having a plurality of continuous optical elements configured to be removably attached to the ophthalmic lens when the lens element is worn. Advantageously, when a person is in a distance environment, e.g., outdoors, the person may detach the clip-on from the ophthalmic lens and eventually replace it with a second clip-on without any of the continuous optical elements. For example, the second clip-on may have a solar tint. A person may also use the ophthalmic lens without any additional clip-on.

[0042] Successive optical elements may be added to the lens element independently on each surface of the lens element.

[0043] At least some, eg, all, of the continuous optical elements may be in a defined array, eg, an array containing identical square or hexagonal cells, or an array containing randomly arranged cells.

[0044] Advantageously, the inventors have observed that, for a given density of optical elements, having at least some, e.g., all, of the optical elements arranged along multiple concentric rings increases the overall visual acuity of the lens element. For example, having a distance D between two adjacent concentric rings of optical elements greater than 2.00 mm allows a larger refractive area to be achieved between these two rings of optical elements, thus providing better visual acuity.

[0045] The continuous optical element may cover a particular zone of the lens element, such as the center or any other area of ​​the lens element.

[0046] According to an embodiment, the center of the lens element may be free of optical elements, for example, a disk centered at the fitting cross and having a radius of more than 1.5 mm, e.g., more than 2 mm, and less than 5 mm may be free of continuous optical elements.

[0047] Different portions of the lens element may not have continuous optical elements depending on design requirements.

[0048] According to an embodiment of the present invention, the prescription portion is formed as a portion other than the portion formed as a plurality of optical elements.

[0049] According to an embodiment of the present invention, the lens element is a contact lens intended to be placed on the eye of a wearer, the entire object surface of the lens element being covered with a plurality of successive optical elements.

[0050] According to a preferred embodiment of the invention, the lens element is a rimmed lens element intended to be mounted in a spectacle frame, the entire surface of at least one face of the lens element being covered with a plurality of continuous optical elements.

[0051] An example of such an embodiment is shown in FIG. 2, where the surface of the lens element is completely covered with a plurality of continuous Fresnel-type optical elements.

[0052] Such an embodiment may be more easily manufactured with discontinuous diffusing optical elements on the surface of the lens element.

[0053] The refractive power of the second optical function in a normal wearing situation may be equal to or less than 0.25 diopters, for example equal to or less than 0.1 diopters. According to an embodiment of the present invention, the refractive power of the second optical function may be equal to 0 diopters.

[0054] Thus, each optical element combined with a prescription portion can provide two refractive powers in a normal wear situation, with the refractive powers corresponding to the first and second optical functions providing refractive powers close to the prescribed refractive power, i.e., with a difference of 0.25 diopters or less.

[0055] The refractive powers corresponding to the first and third optical functions provide refractive power for imaging light rays onto other than the retina of the eye.

[0056] The density or power of the continuous optic may be adjusted depending on the zone of the lens element. Typically, the continuous optic is positioned at the periphery of the lens element to increase its effectiveness in myopia control, for example, to compensate for peripheral defocus due to the peripheral shape of the retina.

[0057] According to a preferred embodiment of the present invention, for any circular zone having a radius between 2 mm and 4 mm and having a geometric center located at a distance of the radius + 5 mm or more from the optical center of a lens element, the ratio of the sum of the areas of the portions of the optical elements located within the circular zone to the area of ​​the circular zone is between 20% and 70%.

[0058] Continuous optical elements can be made using a variety of techniques such as direct surface machining, molding, casting or injection, embossing, thin film machining, or photolithography, etc. According to the present invention, photolithography can be particularly advantageous, especially if one of the surfaces of the lens element is flat.

[0059] According to an embodiment of the present invention, at least one, e.g., all, of the continuous optical elements have a shape configured to produce a focal plane in front of the retina of the human eye. In other words, such discontinuous optical elements are configured such that, if there are any section planes at which the light beams converge, then every such section plane is located in front of the retina of the human eye.

[0060] According to the present invention, the continuous optical element has a multifocal refractive optical function.

[0061] In the sense of the present invention, the optical element is a "multifocal refractive microlens" that includes a bifocal surface, i.e., a surface with two surface refractive powers, a trifocal surface, i.e., a surface with three surface refractive powers, e.g., a progressive multifocal surface with continuously varying surface refractive powers, including aspherical surfaces.

[0062] According to an embodiment of the invention, at least one, for example all, of the continuous optical elements are made of multiple materials. In particular, the refractive index of the optical element may be different from the refractive index of the material of the lens element.

[0063] According to an embodiment of the present invention, at least one, for example all, of the successive optical elements are made of a birefringent material. In other words, the optical elements are made of a material that has a refractive index that depends on the polarization and direction of propagation of the light. Birefringence can be quantified as the maximum difference between the refractive indices exhibited by the materials.

[0064] According to an embodiment of the present invention, at least some, for example all, of the optical elements are diffractive lenses.

[0065] For example, at least some, e.g., all, of the optical elements are pixelated optical elements, such as pixelated lenses, in which one out of two pixels is associated with each optical function. Examples of pixelated lenses are disclosed in Non-Patent Document 1.

[0066] According to an embodiment of the present invention, at least one, eg all, of the continuous optical elements has a discontinuity such as a discontinuous surface, eg a Fresnel surface, and / or a refractive index profile with discontinuities.

[0067] FIG. 3 shows an example of a first diffractive lens radial profile of a continuous optical element that may be used in the present invention.

[0068] FIG. 4 shows an example of a second diffractive lens radial profile of a continuous optical element that may be used in the present invention.

[0069] A diffractive lens can be a Fresnel lens whose phase function ψ(r) has a π phase step at a nominal wavelength λ, as seen in Figure 5. For clarity, the name "π Fresnel lens" can be given to these structures, in contrast to monofocal Fresnel lenses, whose phase step is a multiple of 2π. The π Fresnel lens, whose phase function is displayed in Figure 5, diffracts light primarily in two diffraction orders (orders 0 and +1) associated with diopter powers P(λ)=0δ and a positive one, e.g., P(λ)=3δ, at λ=550 nm.

[0070] The advantage of this design is that the diffractive orders dedicated to the wearer's prescription are achromatic, while the diffractive orders used to provide the third optical function of slowing myopia progression are highly chromatic.

[0071] A typical size of the optic is greater than or equal to 2 mm and less than or equal to 2.5 mm. In practice, the inventors have observed that it is advantageous to keep the optic size less than the pupil size of the wearer's eye.

[0072] For example, the diffraction efficiency of the 0th and +1st orders is approximately 40% at the nominal wavelength λ 0 .

[0073] To increase the efficiency of the diffraction orders corresponding to the wearer's prescription, the following may be considered:

[0074] To increase the efficiency of the 0th diffraction order, the value of λ can be reduced. Figure 6a shows the diffraction efficiency at λ = 550 nm, and Figure 6b shows the diffraction efficiency for λ = 400 nm. In this case, it can be noticed that the diffraction efficiency of order 0 is generally higher across the visible spectrum, while the efficiency of order +1 is lower. In this case, the diopter power of the refractive phase function to which the phase jump is applied is 1.5 for λ = 550 nm, instead of 1.5δ in Figure 6a. * The value should be equal to 400 / 550≈1.1δ, which results in the ring in FIG.

[0075] Additionally or alternatively, one ring from the two in the configuration shown in Figure 5 can be set to zero. In this case, simultaneous bifocal function is still present due to the remaining Fresnel ring, while the ring set to zero induces a significant fraction of the 0 δ diopter power.

[0076] One may further consider applying a Fresnel structure made of two materials with two different refractive indices and different Abbe numbers to obtain the phase function of FIG. 5 at λ=λ and to obtain a more uniform efficiency in the visible spectrum and / or to privilege one of the two main diffraction orders relative to the other.

[0077] Other combinations with superimposed Fresnel structures can also be considered.

[0078] According to an embodiment of the present invention, at least one, for example all, of the continuous optical elements is a multifocal binary component, for example a multifocal binary lens. The binary lens may have a radial profile with a discontinuity height of about 1 μm.

[0079] For example, as shown in Figure 7a, the binary structure primarily displays two diopter powers, designated as -P / 2 and P / 2, corresponding to the two main diffraction orders. When associated with a diffractive structure as shown in Figure 7b, with a diopter power of P / 2, the final structure shown in Figure 7c has diopter powers 0δ and P. The case shown relates to P=3δ.

[0080] Advantageously, the diffraction efficiency for the -1st and 1st orders is approximately 40% at the nominal wavelength, and in addition, the diffraction efficiency remains high across the visible spectrum, typically above 35%.

[0081] According to an embodiment of the present invention, at least a portion, for example all, of the diffractive lens has a metasurface structure, also referred to as a metalens.

[0082] For example, the lens element may comprise an array of simultaneous bifocal metalenses of diopter powers P1, P2, where P1 has 0δ and has controlled chromatic aberration.

[0083] Typically, P1=0δ can be achromatic or partially achromatic, meaning it has the same focal point at each wavelength.

[0084] The chromatic aberration of P2 can be advantageously controlled, for example the focal length and efficiency can be wavelength dependent.

[0085] The chromatic aberration of each metalens can vary as a function of the position of the metalens on the surface of the lens element: near vision, intermediate vision, or far vision.

[0086] Each metalens itself can be made from an array of subwavelength elements.

[0087] For example, the sub-wavelength elements can have any shape, such as circular, rectangular, or elliptical, any dimensions, can be equidistant, and can be aligned in the same direction, all or alternating with each other.

[0088] The subwavelength elements of the metalens should be made of a high dielectric material.

[0089] Each metalens can be made from a combination of "sub-metalenses." For example, bifocality can be obtained as a function of wavelength by spatial multiplexing or stacking several sub-metalens.

[0090] Bifocality can be obtained as a function of polarization by spatial multiplexing or by stacking several sub-metalenses.

[0091] According to an embodiment of the present invention, at least one, e.g., all, of the continuous optical elements have an optical function with high-order optical aberrations, e.g., the optical elements are microlenses made up of continuous surfaces defined by Zernike polynomials.

[0092] The invention has been described above using embodiments without limiting the general inventive concept.

[0093] Many further modifications and variations will be apparent to those skilled in the art with reference to the exemplary embodiments described above, which are given by way of example only and are not intended to limit the scope of the invention, which is determined solely by the appended claims.

[0094] In the claims, the words "comprising" do not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. The mere fact that different features are recited in mutually different dependent claims does not indicate that a combination of these features cannot be used to advantage. Any reference signs in the claims should not be interpreted as limiting the scope of the invention. [Explanation of symbols]

[0095] 10 Lens Elements 12 Prescription Part 14 Optical elements

Claims

1. A lens element intended to be worn in front of a wearer's eye, comprising: a prescription portion configured to provide the wearer with a first optical function based on the wearer's prescription that corrects anomalous refraction of the eye of the wearer in a standard wearing situation; a plurality of successive optical elements; Equipped with Each optical element is - a second optical function of 0.25 diopters or less in standard wearing conditions, and a third optical function that does not form an image on the retina of the eye in the standard wear situation, thereby slowing the progression of the anomalous refraction of the eye, the third optical function being different from the optical function of the prescription portion and differing from the second optical function by at least 0.1 diopters; A lens element having simultaneous bifocal optical functions that simultaneously provide:

2. 2. The lens element according to claim 1, wherein the lens element is a rimmed lens element intended to be mounted in an eyeglass frame, and the entire surface of at least one face of the lens element is covered with the plurality of continuous optical elements.

3. The lens element of claim 2 , wherein at least some of the optical elements are arranged along a plurality of concentric rings.

4. The lens element according to any one of claims 1 to 3, wherein at least a part of the optical element is arranged in front of the lens element.

5. A lens element according to any one of claims 1 to 4, wherein at least a part of the optical element is made of a birefringent material.

6. A lens element according to any one of claims 1 to 5, wherein at least some of the optical elements are multifocal binary components.

7. A lens element according to any one of claims 1 to 6, wherein at least some of the optical elements are pixelated lenses.

8. A lens element according to any one of claims 1 to 7, wherein the difference between the refractive power of the second optical function and the refractive power of the third optical function is 0.5D or more.

9. A lens element according to any one of claims 1 to 8, wherein the difference between the refractive power of the first optical function and the refractive power of the third optical function is 0.5D or more.

10. A method for providing a lens element intended to be worn in front of the eye of a wearer according to any one of claims 1 to 9, comprising: - providing a lens element configured to provide the wearer with a first refractive power based on the wearer's prescription that corrects ametropia of the eye of the wearer under normal wear conditions; - providing an optical patch comprising a plurality of contiguous optical elements; forming a lens element by placing said optical patch on one of the front or back surfaces of said lens member; Including, Each optical element, when the optical patch is disposed on one of the front or back surfaces of the lens member, - Second optical function in standard wearing situations and a third optical function of not forming an image on the retina of the eye in the standard wearing situation, thereby slowing down the progression of the anomalous refraction of the eye; and a simultaneous bifocal optical function that simultaneously provides:

11. 10. A method of providing a lens element intended to be worn in front of an eye of a wearer according to any one of claims 1 to 9, comprising the steps of: casting said lens element; and, during said casting step, when said lens element is worn in front of said eye of said wearer: - Second optical function in standard wearing situations and a third optical function of not forming an image on the retina of the eye in the standard wearing situation, thereby slowing down the progression of the anomalous refraction of the eye; and providing an optical patch including a plurality of successive optical elements each having simultaneous bifocal optical functions that simultaneously provide:

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