Lens element

Abstract

The present invention relates to a method for manufacturing a lens element intended to be worn in front of a wearer's eyes, the method comprising: - obtaining a lens element comprising a holographic recording medium disposed on a first surface of the lens element, wherein the holographic recording medium is configured to convert an interference pattern into a holographic optical element; - obtaining wearer prescription data at least related to the wearer's prescription; - manufacturing a second surface of the lens element based on the wearer prescription data; and - recording a holographic optical element within the holographic recording medium to provide an additional optical magnification of a signal opposite to the prescribed optical magnification to slow down the progression of abnormal refraction of the eye.

Description

Technology Field

[0001] The present invention relates to a lens element intended to be worn in front of a person's eye to suppress or reduce the progression of abnormal refraction of the eye, such as myopia or hyperopia. The present invention further relates to a lens member comprising a first optical surface having a surface design and a second optical surface to be manufactured. Background Technology

[0002] Myopia is characterized by the fact that the eye focuses on distant objects in front of the retina, while hyperopia is characterized by the fact that the eye focuses on distant objects behind the retina. Myopia is typically corrected using concave lenses that provide negative refractive magnification, and hyperopia is typically corrected using convex lenses that provide positive refractive magnification.

[0003] It has been observed that when corrected using conventional single-view optical lenses, some individuals, particularly children, focus inaccurately when observing objects located at short distances—that is, under near-view conditions. Due to these focusing defects created by the myopic child when corrected for distant viewing, the image of nearby objects is also formed behind the retina in the fovea region.

[0004] Such focusing defects can affect the progression of myopia in such individuals. In most of the aforementioned individuals, it can be observed that myopic defects, which are partly caused by periods of long and thorough precision work, tend to increase over time.

[0005] In particular, studies conducted on monkeys have indicated that strong defocus of light behind the retina occurring far from the foveal zone can cause the eye to dilate, thereby increasing myopic defects. The problem to be solved

[0006] Therefore, it appears there is a need for lens elements that inhibit or at least slow down the progression of abnormal refractive errors of the eye, such as myopia or hyperopia. means of solving the problem

[0007] For this purpose, the present invention:

[0008] - For example, a refractive element configured to provide a first optical magnification based on a wearer’s prescription that corrects abnormal refraction of the wearer’s eye under standard wearing conditions and with respect to foveal vision, wherein the prescription includes at least a prescribed optical magnification adapted to the wearer;

[0009] - A lens element intended to be worn in front of a wearer's eye is proposed, comprising at least one holographic optical element that provides an additional optical magnification of a signal opposite to an optical magnification prescribed to slow the progression of abnormal refraction of the eye.

[0010] Advantageously, having a holographic optical element that provides an additional optical magnification of the opposing signal to the prescribed optical magnification reduces the natural tendency of the retina of the eye to deform, particularly to expand. Therefore, the progression of abnormal refraction of the eye is slowed down.

[0011] Furthermore, the holographic optical element has the advantage of being inconspicuous and enables the measurement of the first optical magnification using conventional means such as a focal length measuring instrument.

[0012] According to additional embodiments that may be considered alone or in combination:

[0013] - At least one holographic optical element provides an additional optical magnification of at least 0.25 diopters in absolute value, e.g. 1.5 diopters or more, through a portion of the visible spectrum, and / or;

[0014] - The abnormal refraction of the wearer's eye corresponds to myopia, the additional optical magnification is positive, and the holographic optical element is configured to provide the effect of a refractive convergence lens for light coming from at least one object;

[0015] - The abnormal refraction of the wearer's eye corresponds to hyperopia, the additional optical magnification is negative, and the holographic optical element is configured to provide the effect of a refractive diverging lens for light coming from at least one object;

[0016] - At least one object is located at a finite distance from the holographic optical element and / or;

[0017] - At least one object is located at an infinite distance of the holographic optical element and / or;

[0018] - The lens element further comprises at least two holographic optical elements, wherein the first holographic optical element is configured to provide the effect of a refractive lens for light coming from an object at a finite distance from the holographic optical element, and the second holographic optical element is configured to provide the effect of a refractive lens for light coming from an object at an infinite distance from the holographic optical element and / or;

[0019] - At least one holographic optical element has a circumferential degree;

[0020] - At least one holographic optical element is located on the front surface of the lens element and / or;

[0021] - At least one holographic optical element is located on the rear end surface of the lens element and / or;

[0022] - At least one holographic optical element is positioned between the front and rear surfaces of the lens element and / or;

[0023] - At least one holographic optical element has alternating concentric annular sections having an optical magnification of 0.25 diopters or more, and concentric annular sections having an optical magnification of 0.1 diopters or less;

[0024] - The lens element further comprises at least two holographic optical elements having different portions of the effective visible spectrum and / or angular bands;

[0025] - At least two holographic optical elements are configured to provide the same additional optical magnification and / or;

[0026] - At least two holographic optical elements are configured to provide different additional optical magnifications and / or;

[0027] - At least two holographic optical elements have different positions between the front and rear planes of the lens element;

[0028] - The lens element has a near-field viewing reference point, and at least one holographic optical element extends through the near-field viewing reference point and / or;

[0029] - At least one holographic optical element has an efficiency of 10% or more in the effective visible spectrum, and / or;

[0030] - The holographic element is configured to provide additional optical magnification to light rays passing through the holographic element and / or;

[0031] - The holographic element is configured to provide additional optical magnification to the light rays reflected by the holographic element and / or;

[0032] - At least one holographic optical element has alternating concentric annular sections having an optical magnification of 0.5 diopters or more, and concentric annular sections having an optical magnification of 0.1 diopters or less.

[0033] The present invention also relates to eyeglass equipment intended to be worn by a wearer, wherein the eyeglass equipment has a lens element according to the present invention.

[0034] Eyewear equipment may be eyeglass frames, helmets, masks, or any head-up device.

[0035] The present invention further:

[0036] - A first optical surface having a surface design,

[0037] - A second optical surface to be manufactured, and

[0038] - It relates to a lens member comprising a holographic recording medium configured to convert an interference pattern into a holographic optical element.

[0039] Advantageously, such a lens member can be used to obtain a lens element according to the present invention.

[0040] According to additional embodiments that may be considered alone or in combination:

[0041] - The holographic recording medium is positioned on a first optical plane and / or;

[0042] - The holographic recording medium is positioned between the first optical plane and the second optical plane and / or;

[0043] - The holographic recording medium is flat or has the same shape as the first optical plane;

[0044] - The holographic recording medium extends through the geometric center of the first optical plane and / or;

[0045] - The holographic recording medium has a surface area greater than 10% of the surface area of ​​the first optical surface and / or;

[0046] - The lens element further includes a plurality of holographic recording media, each holographic recording medium being configured to convert interference patterns through different parts of the visible spectrum into holographic optical elements.

[0047] The present invention further:

[0048] - A first optical surface having a surface design,

[0049] - A second optical surface to be manufactured, and

[0050] - It relates to a lens member comprising at least one holographic optical element that provides optical magnification through a portion of the visible spectrum.

[0051] Advantageously, such a lens member can be used to obtain a lens element according to the present invention.

[0052] According to additional embodiments that may be considered alone or in combination:

[0053] - At least one holographic optical element provides an optical magnification of 0.25 diopters or more, e.g. 1.5 diopters or more, and / or;

[0054] - At least one holographic optical element is positioned on a first optical plane and / or;

[0055] - At least one holographic optical element is positioned between the first optical plane and the second optical plane and / or;

[0056] - At least one holographic optical element comprises the geometric center of the first optical plane and extends around it and / or;

[0057] - At least one holographic optical element has a surface area greater than 10% of the surface area of ​​the first optical surface and / or;

[0058] - The lens element further includes at least two holographic optical elements having different portions of the effective visible spectrum and / or each band.

[0059] The present invention further relates to a method for manufacturing a lens element intended to be worn in front of a wearer's eyes, wherein the method comprises:

[0060] - A step of obtaining a lens member comprising a holographic recording medium disposed on a first surface of the lens member, wherein the holographic recording medium is configured to convert an interference pattern into a holographic optical element;

[0061] - A step of obtaining wearer prescription data that is at least related to the wearer's prescription;

[0062] - A step of manufacturing a second surface of a lens member based on wearer prescription data;

[0063] - Includes the step of recording a holographic optical element in a holographic recording medium to provide an additional optical magnification of the opposing signal to the prescribed optical magnification to slow the progression of abnormal refraction of the eye.

[0064] Advantageously, the method according to the present invention makes it possible to simplify and facilitate the manufacturing process of a lens element including a holographic optical element.

[0065] According to additional embodiments of the present invention which may be considered alone or in combination:

[0066] - The first optical surface corresponds to the front surface of the lens member and / or the rear surface of the lens member and / or a surface included between the front surface and the rear surface;

[0067] - The step of manufacturing the second surface of the lens member is performed prior to the step of recording the holographic optical element and / or;

[0068] - The abnormal refraction of the wearer's eye corresponds to myopia, the additional optical magnification is positive, and the holographic optical element is recorded to provide the effect of a refractive convergence lens for light coming from at least one object;

[0069] - The abnormal refraction of the wearer's eye corresponds to hyperopia, the additional optical magnification is negative, and the holographic optical element is recorded to provide the effect of a refractive diverging lens for light coming from at least one object;

[0070] - At least one object is located at a finite distance from the holographic optical element and / or;

[0071] - At least one object is located at an infinite distance of the holographic optical element and / or;

[0072] - The step of recording a holographic optical element comprises at least a step of recording a first holographic optical element, wherein the first holographic optical element is configured to provide the effect of a refractive lens for light coming from an object at a finite distance from the holographic optical element, and a step of recording a second holographic optical element, wherein the second holographic optical element is configured to provide the effect of a refractive lens for light coming from an object at an infinite distance from the holographic optical element, and / or;

[0073] - The step of recording a holographic optical element includes at least a step of recording a first holographic optical element and at least a step of recording a second holographic optical element, wherein the holographic optical elements are recorded to have different portions of an effective visible spectrum and / or each band;

[0074] - At least two holographic optical elements are recorded to provide the same additional optical magnification and / or;

[0075] - The lens member includes a near-field viewing reference point, and at least one holographic optical element is recorded to extend through the near-field viewing reference point. Effects of the invention

[0076] Included in the contents of the present invention. Brief explanation of the drawing

[0077] Non-limiting embodiments of the present invention will now be described with reference to the accompanying drawings. Figure 1 is an overall side view of a lens element according to one embodiment of the present invention. Figure 2 is a plan view of a lens element according to one embodiment of the present invention. Figure 3 illustrates a holographic optical element according to one embodiment of the present invention. Figure 4 is a flowchart of the method according to the present invention. The elements in the drawings are illustrated for simplicity and clarity and are not necessarily drawn in proportion. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to others to help improve understanding of the embodiments of the invention. Specific details for implementing the invention

[0078] The present invention relates to a lens element intended to be worn in front of the wearer's eyes.

[0079] In the remainder of this description, terms such as “up,” “bottom,” “horizontal,” “vertical,” “above,” “below,” “front,” and “rear,” or other words indicating relative positions may be used. These terms should be understood as the wearing conditions of the lens element.

[0080] In the context of the present invention, the term “lens element” may refer to an unprocessed optical lens, an spectacle optical lens edged to fit a specific spectacle frame, or an ophthalmic lens and an optical device configured to be positioned on the ophthalmic lens.

[0081] The lens element according to the present invention is intended to be adapted to a wearer and worn in front of the wearer's eyes. Although the present invention is described in detail with respect to myopia with abnormal refraction, the present invention applies to hyperopia with abnormal refraction. Those skilled in the art may adapt the description to hyperopia.

[0082] As shown in FIG. 1, the lens element (10) according to the present invention is:

[0083] - Refractive element (12), and

[0084] - Includes at least one holographic element (14).

[0085] The lens element (10) illustrated in FIG. 1 includes a front or "target side" surface (F1) formed as a convex curved surface toward the target side, and a rear or "eye side" surface (F2) formed as a concave surface having a curvature different from the curvature of the target side surface (F1).

[0086] In FIG. 1, the front cross-section is shown as convex and the rear cross-section is shown as concave, but the present invention is not limited to such a configuration.

[0087] The refractive element (12) is configured to provide the wearer with a first optical magnification based on the wearer's prescription to correct the abnormal refraction of the wearer's eye, for example, under standard wearing conditions and with respect to foveal vision.

[0088] Wearing conditions should be understood as the position of the lens element relative to the wearer's eye, defined by, for example, the wide angle, cornea-to-lens distance, pupil-to-cornea distance, center of rotation (CRE) to pupil distance, CRE to lens distance, and wrap angle.

[0089] The cornea-to-lens distance is the distance along the visual axis of the eye at the periphery (typically taken as horizontal) between the cornea and the posterior surface of the lens; for example, it is equivalent to 12 mm.

[0090] The pupil-to-cornea distance is the distance along the visual axis of the eye between the pupil and the cornea; it is typically equivalent to 2 mm.

[0091] The distance between the CRE and the pupil is the distance along the visual axis of the eye between the center of rotation (CRE) of the eye and the cornea; for example, it is equivalent to 11.5 mm.

[0092] The distance between the CRE and the lens is, for example, the distance along the visual axis of the eye at the periphery (typically taken as horizontal) between the CRE of the eye and the rear end surface of the lens, equivalent to 25.5 mm.

[0093] The angle of view is the angle in the vertical plane between the normal to the rear end of the lens and the visual axis of the eye at the primary value (typically taken as horizontal) at the point of intersection between the rear end of the lens and the visual axis of the eye at the primary value; for example, it is equivalent to 8°.

[0094] The lap angle is the angle in the horizontal plane between the normal to the rear end of the lens and the visual axis of the eye at the principal value (typically taken as horizontal) at the point of intersection between the rear end of the lens, equivalent to, for example, 0°, and the visual axis of the eye at the principal value.

[0095] An example of standard wearer conditions may be limited by a wide angle of 8°, a cornea-to-lens distance of 12 mm, a pupil-to-cornea distance of 2 mm, a CRE-to-pupil distance of 11.5 mm, a CRE-to-lens distance of 25.5 mm, and a lap angle of 0°.

[0096] The term "prescription" should be understood to mean a set of optical properties, such as optical magnification, astigmatism, and spectral deviation, determined by an ophthalmologist or optometrist to correct visual impairment, for example, by a lens positioned in front of the wearer's eyes. For example, a prescription for a myopic eye includes values ​​for optical magnification and astigmatism, including the angular width and axis for distant vision.

[0097] Although the present invention is not limited to progressive lenses, the expressions used in this description are exemplified in FIGS. 1 through 10 of the document WO2016 / 146590 concerning progressive lenses. Those skilled in the art may adapt the definitions to single-vision lenses.

[0098] The refractive element may be configured to provide a single optical magnification and / or astigmatism including angular widths and axial values ​​corresponding to the optical magnification prescribed for the wearer.

[0099] Refractive elements can have a continuous change in optical magnification. For example, refractive elements can have a progressive multifocal design.

[0100] The optical design of the refractive element is

[0101] - Optical magnification is the wife's fitting cross,

[0102] - When the lens element is worn by a wearer, it may include a first zone extending from the temple side of the refractive element. In the first zone, the optical magnification increases as it moves toward the temple side, and across the nose side of the lens, the optical magnification is substantially the same as at the fitting cross.

[0103] Such an optical design is disclosed in more detail in WO2016 / 107919.

[0104] At least one holographic optical element (14) provides an additional optical magnification of the signal opposite to the optical magnification prescribed to slow down the progression of abnormal refraction of the eye.

[0105] In the sense of the present invention, the "holographic optical element" changes the amplitude and / or phase and / or polarization of a light beam transmitted through or reflected by the holographic optical element.

[0106] A holographic optical element may be configured to provide additional optical magnification to light rays passing through the holographic element. According to such an embodiment, the holographic optical element is configured to provide additional optical magnification to light coming from the wearer's environment when the lens element is worn.

[0107] Alternatively, the holographic element is configured to provide optical magnification to the light rays reflected by the holographic element. According to such an embodiment, the optical lens element is mounted on a head-mounted device, for example, an eyeglass frame containing a light source, or more generally on an image generator. The head-mounted device is configured so that light rays from the light source are reflected toward the wearer's eyes on the holographic optical element when the lens element is worn.

[0108] Advantageously, having a holographic optical element that provides an additional optical magnification of the opposing signal to the prescribed optical magnification generates an image in front of the retina that acts as a stop signal for eye growth, which reduces deformation of the wearer's eye retina particularly in peripheral vision, thereby enabling the slowing of the progression of abnormal refraction of the eye of the person wearing the lens element.

[0109] When the abnormal refraction of the wearer's eye corresponds to myopia, the additional optical magnification is positive, and the holographic optical element is configured to provide the effect of a refractive convergence lens for light coming from at least one object.

[0110] When the abnormal refraction of the wearer's eye corresponds to hyperopia, the additional optical magnification is negative, and the holographic optical element is configured to provide the effect of a refractive diverging lens for light coming from at least one object.

[0111] At least one object may be located at a finite distance from the holographic optical element, or alternatively, at least one object may be located at an infinite distance from the holographic optical element.

[0112] According to a preferred embodiment of the present invention, the holographic optical element provides an additional optical magnification of at least 0.25 diopters in absolute value, for example, at least 0.5 diopters in absolute value, for example, at least 1.5 diopters in absolute value, to light passing through or reflected by the holographic optical element through a portion of the visible spectrum.

[0113] In addition to providing additional optical magnification, the holographic optical element may also have an optical function that provides circumferential degree.

[0114] In the example shown in FIG. 1, the holographic optical element (14) is positioned between the front and rear surfaces of the lens element (10). The holographic optical element (14) may have a planar shape or any curved shape.

[0115] Alternatively, the holographic optical element can be located on the front surface (F1) of the lens element.

[0116] Furthermore, the holographic optical element can be positioned on the rear end surface (F2) of the optical element.

[0117] Preferably, at least one holographic optical element has an efficiency of 10% or more in the effective visible spectrum.

[0118] Preferably, at least one holographic optical element is configured to have the maximum possible angular band.

[0119] The holographic optical element may have alternating concentric annular sections having an optical magnification of 0.25 diopters or more, and concentric annular sections having an optical magnification of 0.1 diopters or less.

[0120] According to one embodiment of the present invention, a lens element has a near-field viewing reference point, and a holographic optical element extends through the near-field viewing reference point.

[0121] The near-distance viewing reference point is the point of the lens element through which the wearer's gaze direction must pass when the wearer is gazing at an object at approximately 40 cm in standard wearer conditions.

[0122] Advantageously, having a holographic element positioned in the near-distance viewing zone of the lens element helps slow the progression of abnormal refraction of the eye while reducing the size of the holographic optical element. In fact, the inventors observed that the efficiency of the holographic optical element is greater when placed in the near-distance viewing zone.

[0123] The lens element can be divided into multiple zones.

[0124] For example, as shown in FIG. 2, the lens element can be divided into four quarter arcs (Q1, Q2, Q3, Q4) at 45°.

[0125] In the sense of the present invention, "quadruple arcs at 45°" should be understood as quadruple arcs forming an equal angle of 90° oriented in the directions 45° / 225° and 135° / 315° according to the TABO convention as shown in FIG. 2.

[0126] According to one embodiment of the present invention, each quarter arc may include a holographic optical element that provides a different optical magnification.

[0127] For example, the first quarter arc (Q1) may include a holographic element providing an additional optical magnification of 0.5 diopters, the second quarter arc (Q2) may include a holographic element providing an additional optical magnification of 1 diopter, the third quarter arc (Q3) may include a holographic element providing an additional optical magnification of 1.5 diopters, and the fourth quarter arc (Q4) may include a holographic element providing an additional optical magnification of 2 diopters.

[0128] Advantageously, when the optical design of the refractive element is cyclically symmetric, such arrangements make it possible to adjust the additional optical magnification by simply rotating the lens element to have a quarter arc having the desired additional optical magnification, which is positioned as a near-distance viewing zone at the lower position.

[0129] As shown in FIG. 2, the lens element may include a plurality of holographic optical elements (14a to 14d).

[0130] In the example shown in FIG. 2, different holographic elements have different positions and provide different additional optical magnifications.

[0131] Typically, holographic optical elements are recorded using an interference pattern with a given angle of incidence and a monochromatic light source such as a laser.

[0132] Therefore, the holographic optical element has an effective visible spectrum around the wavelength of the monochromatic light source used to record the holographic element and an angular band around the angle of incidence used to record the holographic element.

[0133] According to one embodiment of the present invention, the lens element may further include at least two holographic optical elements having different portions of the effective visible spectrum and / or each band.

[0134] Therefore, the effective visible spectrum and / or the entire portion of each band is increased.

[0135] At least two holographic optical elements can be configured to provide the effect of a refractive lens for light coming from different objects at different distances.

[0136] For example, the first holographic optical element may be configured to provide the effect of a refractive lens for light coming from an object at a finite distance from the holographic optical element, and the second holographic optical element may be configured to provide the effect of a refractive lens for light coming from an object at an infinite distance from the holographic optical element.

[0137] Different holographic optical elements can be configured to provide different additional optical magnifications, as in the example shown in FIG. 2.

[0138] Alternatively, different holographic optical elements can be configured to provide the same additional optical magnification.

[0139] In the sense of the present invention, when the difference between two optical magnifications is 0.25 D or greater, the two optical magnifications are considered to be different.

[0140] Different holographic optical elements may have different positions between the front and rear planes of the lens element in a plane perpendicular to the optical lens element, that is, along the optical axis of the lens element and / or on the lens element.

[0141] Multiple holographic optical elements may be non-adjacent holographic optical elements.

[0142] In the sense of the present invention, for all paths connecting two holographic optical elements, if the refractive power based on a prescription for the human eye can be measured along at least a portion of each path, the two holographic optical elements are not adjacent.

[0143] A plurality of holographic optical elements (14) may include at least two adjacent holographic optical elements.

[0144] In the sense of the present invention, there is a path connecting two holographic optical elements, and along part of the path, if the refractive power based on a prescription for a human eye cannot be measured, the two holographic optical elements are adjacent.

[0145] As illustrated in FIG. 3, holographic optical elements (14) may be positioned along a set of concentric rings on a refractive element (12). The optical magnification and / or cylinder of the holographic optical elements may vary depending on the position of the holographic optical elements along the concentric rings.

[0146] The optical functions of the holographic optical elements correspond to parts of purely cylindrical concentric rings. In this example, the holographic optical elements have optical functions with a constant magnification, except for a variable cylindrical axis.

[0147] The embodiment described with reference to FIG. 3 having concentric rings can be combined with the embodiment of FIG. 2 having a plurality of zones such as four quarter arcs.

[0148] The lens element according to the present invention may or may not be colored. The lens element may preferably include a photochromic layer and / or a polarizing layer on the target side of the lens element.

[0149] The present invention further:

[0150] - A first optical surface having a surface design,

[0151] - A second optical surface to be manufactured, and

[0152] - It relates to a lens member comprising a holographic recording medium configured to convert an interference pattern into a holographic optical element.

[0153] The holographic recording medium can be a holographic film or a holographic gloss.

[0154] According to one embodiment of the present invention, a holographic recording medium may be positioned on a first optical surface. Advantageously, the holographic medium is easily accessible and the second optical surface may be manufactured using a standard manufacturing process.

[0155] According to one embodiment, the holographic recording medium is positioned between a first optical surface and a second optical surface. Advantageously, the holographic medium is protected.

[0156] According to such an embodiment, the holographic recording medium may be flat or have the same shape as the first optical surface.

[0157] Preferably, the holographic recording medium extends through the geometric center of the first optical plane. In the sense of the present invention, if a line perpendicular to the first optical plane and passing through the geometric center of the first optical plane passes through the holographic medium, the holographic recording medium is considered to extend through said geometric center.

[0158] According to one embodiment of the present invention, the holographic recording medium has a surface area of ​​more than 10% of the surface area of ​​the first optical surface.

[0159] The lens member may include a plurality of holographic recording media, and each holographic recording medium is configured to convert an interference pattern through different parts of the visible spectrum into a holographic optical element.

[0160] The present invention further relates to a method for manufacturing a lens element according to the present invention, wherein the method is:

[0161] - Lens absence provision step,

[0162] - Hologram recording stage, and

[0163] - Includes the lens manufacturing step.

[0164] During the step of providing a lens member, a lens member according to the present invention having a holographic recording medium is provided.

[0165] The lens member can be selected based on the surface design of the first optical plane.

[0166] During the holographic recording step, the holographic optical element is recorded in the holographic recording medium to provide an optical function having an additional optical of 0.25 diopters or more, for example, 1.5 diopters or more.

[0167] During the manufacturing stage, the second surface of the lens element is manufactured based on the wearer's prescription to obtain a lens element.

[0168] The hologram recording step and the lens manufacturing step can be interchanged. That is, the lens manufacturing step can be performed prior to the hologram recording step.

[0169] A hologram can be recorded on a holographic layer and added to a lens member using the same type of process as for adding a polarization layer.

[0170] The present invention also relates to a method for manufacturing a lens element intended to be worn in front of a wearer's eyes.

[0171] A method for manufacturing a lens element includes the step of obtaining a lens member comprising a holographic recording medium disposed on a first surface of the lens member.

[0172] According to different embodiments of the present invention, the first optical surface may correspond to a front end surface of a lens member and / or a rear end surface of a lens member and / or a surface included between the front end surface and the rear end surface.

[0173] In the sense of the present invention, the rear end surface of the lens refers to the surface of the lens that faces the wearer's eye when the wearer wears the lens. The front end surface corresponds to the surface opposite the rear end surface, and the surface opposite the rear end surface accordingly faces the wearer's environment.

[0174] The holographic recording medium is configured to convert interference patterns into holographic optical elements. That is, prior to recording, the holographic recording medium does not provide additional optical magnification to the lens component.

[0175] The holographic recording medium can be a holographic film or a holographic gloss.

[0176] The lens component may include a near-distance viewing reference point.

[0177] A method for manufacturing a lens element further includes a step of obtaining wearer prescription data. The wearer data relates to at least the wearer's prescription.

[0178] A method for manufacturing a lens element may further include a step of obtaining wear condition data. The wear condition data may relate to wear conditions that are measured on the wearer or customized based on, for example, morphological or postural data related to the wearer.

[0179] A method for manufacturing a lens element may further include the step of obtaining wearer retinal data. Wearer retinal data is provided that is at least related to the shape of the wearer's retina in a reference frame identical to the wearing conditions. The wearer retinal data may correspond to a standard retinal shape, or to a retinal shape measured on the wearer or customized based, for example, the wearer's morphology or prescription. The retinal data may also be expressed with respect to an optical magnification to be recorded on a holographic optical element.

[0180] A method for manufacturing a lens element further includes the step of manufacturing a second surface of a lens element based at least on wearer prescription data.

[0181] According to one embodiment of the present invention, a second surface of the lens member is further manufactured based on wear data.

[0182] A method for manufacturing a lens element further includes the step of recording a holographic optical element within a holographic recording medium.

[0183] The holographic optical element is recorded to provide an additional optical magnification of the opposing signal to the optical magnification prescribed to slow the progression of abnormal refraction of the eye.

[0184] When the abnormal refraction of the wearer's eye corresponds to myopia, the additional optical magnification is positive, and the holographic optical element is recorded to provide the effect of a refractive convergence lens for light coming from at least one object.

[0185] Alternatively, when the abnormal refraction of the wearer's eye corresponds to hyperopia, the additional optical magnification is negative, and the holographic optical element is recorded to provide the effect of a refractive diverging lens for light coming from at least one object.

[0186] At least one object may be located at a finite distance from the recorded holographic optical element, or alternatively, at least one object may be located at an infinite distance from the recorded holographic optical element.

[0187] Preferably, the step of manufacturing the second surface of the lens member is performed before the step of recording the holographic optical element.

[0188] Advantageously, the step of recording a holographic optical element after the step of manufacturing a second surface of an optical lens facilitates the manufacturing of the lens. In fact, once the second surface of the lens member is manufactured and the optical function of the lens is limited, it becomes easier to record a holographic optical element so that the holographic optical element focuses light in front of / behind the retina of the user to slow down abnormal refraction of the wearer's eye.

[0189] According to another embodiment of the present invention, the step of recording a holographic optical element may include at least the step of recording a first holographic optical element and a second holographic optical element.

[0190] The first holographic optical element can be configured to provide the effect of a refractive lens for light coming from an object at a finite distance from the holographic optical element.

[0191] The second holographic optical element can be configured to provide the effect of a refractive lens for light coming from an object at an infinite distance from the holographic optical element.

[0192] The first and second holographic optical elements can be recorded to have different portions of the effective visible spectrum and / or each band.

[0193] The first and second holographic optical elements may be recorded to provide the same additional magnification. Alternatively, the first and second holographic optical elements may be recorded to provide different additional magnifications.

[0194] At least one holographic optical element can be recorded to extend through a near-field viewing point of the lens member.

[0195] The present invention also:

[0196] - A first optical surface having a surface design,

[0197] - A second optical surface to be manufactured, and

[0198] - It relates to a lens member comprising at least one holographic optical element that provides optical magnification through a portion of the visible spectrum.

[0199] Advantageously, such a lens element can be used to manufacture a lens element that adapts to the wearer to slow the progression of abnormal refraction, such as myopia.

[0200] Preferably, at least one holographic optical element provides an optical magnification of 0.25 diopters or more, for example, 1.5 diopters or more.

[0201] The holographic optical element may be positioned on the first optical plane or between the first optical plane and the second optical plane.

[0202] According to one embodiment of the present invention, at least one holographic optical element includes the geometric center of a first optical plane and extends around it.

[0203] Preferably, at least one holographic optical element has a surface area greater than 10% of the surface area of ​​the first optical surface.

[0204] The lens member according to the present invention may include at least two holographic optical elements having different portions of the effective visible spectrum and / or each band.

[0205] The present invention also relates to a method for determining a lens element adapted to slow down the progression of abnormal refraction of the wearer's eye.

[0206] As illustrated in FIG. 4, the method of the present invention is at least:

[0207] - Wearer prescription data provision step (S1),

[0208] - Step of providing wearing condition data (S2),

[0209] - Wearer retinal data provision step (S3), and

[0210] - Includes a lens element determination step (S4).

[0211] During the wearer prescription data provision step (S1), wearer prescription data related to the wearer's prescription is provided.

[0212] Wearing condition data related to the wearing conditions of the lens element by the wearer is provided during the wearer condition data provision step (S2).

[0213] According to one embodiment of the present invention, the wear condition data provided during the wear condition data provision step corresponds to standard wear conditions.

[0214] Alternatively, the wear condition data provided during the wear condition data provision step corresponds to wear conditions that are measured on the wearer or customized based on, for example, morphological or postural data related to the wearer.

[0215] During the wearer retinal data provision step (S3), retinal data related to the shape of the wearer's retina in a reference frame identical to the wearing conditions is provided.

[0216] According to one embodiment of the present invention, the wearer retinal data provided during the wearer retinal data provision step corresponds to a standard retinal shape.

[0217] Examples of standard retinal features are disclosed in “Refractive error, axial length, and relative peripheral refractive error before and after the onset of myopia” by Mutti DO1, Hayes JR, Mitchell GL, Jones LA, Moeschberger ML, Cotter SA, Kleinstein RN, Manny RE, Twelker JD, Zadnik K; CLEERE Study Group, Invest Ophthalmol Vis Sci. 2007 Jun;48(6):2510-9.

[0218] Additional examples of standard retinal features are disclosed in “Peripheral refraction along the horizontal and vertical visual fields in myopia”, by Atchison DA1, Pritchard N, Schmid KL, Vision Res. 2006 Apr;46(8-9):1450-8.

[0219] Additional examples of standard retinal shapes are disclosed in “Peripheral Refraction and Ocular Shape in Children”, by Donald O. Mutti, Robert I. Sholtz, Nina E. Friedman, and Karla Zadnik in IOVS, April 2000, Vol. 41, No. 5.

[0220] Alternatively, the wearer retinal data provided during the wearer retinal data provision step may correspond to the shape of the retina measured on the wearer or customized based, for example, the wearer's morphology or prescription. The retinal data may also be represented with respect to the optical magnification to be recorded on a holographic optical element.

[0221] During the lens element determination step (S4), a lens element including a refractive element and at least one holographic optical element is determined.

[0222] The lens element is determined such that the refractive element provides a first optical magnification based on the wearer's prescription for foveal vision and under wearing conditions corresponding to the wearing data.

[0223] Furthermore, at least one holographic optical element is determined to provide an additional optical magnification of the opposing signal to the prescribed optical magnification.

[0224] When the abnormal refraction of the wearer's eye corresponds to myopia, the additional optical magnification is positive, and the holographic optical element is configured to provide the effect of a refractive convergence lens for light coming from at least one object.

[0225] When the abnormal refraction of the wearer's eye corresponds to hyperopia, the additional optical magnification is negative, and the holographic optical element is configured to provide the effect of a refractive diverging lens for light coming from at least one object.

[0226] At least one object may be located at a finite distance from the holographic optical element, or alternatively, at least one object may be located at an infinite distance from the holographic optical element.

[0227] According to one embodiment of the present invention, during the lens element determination step, a plurality of holographic optical elements having different portions of the effective visible spectrum and / or each band are determined.

[0228] As illustrated in FIG. 4, the method of the present invention may further include a shear surface data provision step (S40).

[0229] During the shear surface data provision step (S40), shear surface data representing the shear surface or the first surface of the lens element is provided.

[0230] According to such an embodiment, during the lens element determination step, the shape of the rear end surface or the second surface, and the holographic optical elements to be disposed on the front end surface are determined such that the refractive element provides a first optical magnification based on the wearer's prescription for the wearer's prescription under wearing conditions corresponding to the wearing data and for the foveal vision, and at least one holographic optical element provides an additional optical magnification of the signal opposite to the prescribed optical magnification.

[0231] According to a preferred embodiment, during the lens element determination step, the shape of the rear end surface is determined such that the refractive element provides a first optical magnification based on the wearer's prescription for the foveal vision and under wearing conditions corresponding to the wearing data.

[0232] The additional optical magnification of the holographic optical element is determined to focus light rays at a given distance from the retina of the eye, particularly for peripheral vision.

[0233] The present invention has been described with the help of examples without limiting the general inventive concept.

[0234] Many additional changes and variations will be apparent to those skilled in the art when referring to the aforementioned exemplary embodiments, which are given by way of example only and are not intended to limit the scope of the invention as determined solely by the appended claims.

[0235] In the claims, the word “comprising” does not exclude other elements or steps, and the indefinite articles “a” or “an” do not exclude the plural. The fact that different features are listed in different dependent claims does not mean that a combination of these features cannot be used advantageously. Any reference numerals in the claims should not be interpreted as limiting the scope of the invention.

[0236] In the sense of the present invention, the term "obtaining" includes the terms "receiving" and "retrieving."

Claims

Claim 1 A method for manufacturing a lens element intended to be worn in front of a wearer's eyes, comprising: - obtaining a lens element comprising a holographic recording medium disposed on a first optical surface of the lens element, wherein the holographic recording medium is configured to convert an interference pattern into a holographic optical element; - obtaining wearer prescription data at least related to the wearer's prescription; - manufacturing a second optical surface of the lens element based on the wearer prescription data; - recording a holographic optical element within the holographic recording medium to provide an additional optical magnification of a signal opposite to the prescribed optical magnification to slow down the progression of abnormal refraction of the eye, wherein the step of manufacturing the second optical surface of the lens element is performed prior to the step of recording the holographic optical element. Claim 2 A method according to claim 1, wherein the first optical surface corresponds to a surface included in at least one of the front surface of the lens member, the rear surface of the lens member, and the area between the front surface and the rear surface. Claim 3 A method according to claim 1, wherein the abnormal refraction of the wearer's eye corresponds to myopia, the additional optical magnification is positive, and the holographic optical element is recorded to provide the effect of a refractive convergence lens for light coming from at least one object. Claim 4 A method according to claim 1, wherein the abnormal refraction of the wearer's eye corresponds to hyperopia, the additional optical magnification is negative, and the holographic optical element is recorded to provide the effect of a refractive diverging lens for light coming from at least one object. Claim 5 A method according to claim 3 or 4, wherein at least one object is located at a finite distance from the holographic optical element. Claim 6 A method according to claim 3 or 4, wherein at least one object is located at an infinite distance from the holographic optical element. Claim 7 A method according to claim 1, wherein the step of recording a holographic optical element comprises at least a step of recording a first holographic optical element, wherein the first holographic optical element is configured to provide the effect of a refractive lens for light coming from an object at a finite distance from the holographic optical element, and a step of recording a second holographic optical element, wherein the second holographic optical element is configured to provide the effect of a refractive lens for light coming from an object at an infinite distance from the holographic optical element. Claim 8 A method according to claim 1, wherein the step of recording a holographic optical element includes at least a step of recording a first holographic optical element and at least a step of recording a second holographic optical element, wherein the holographic optical elements are recorded to have different portions of an effective visible spectrum and / or each band. Claim 9 A method according to claim 8, wherein at least two holographic optical elements are recorded to provide the same additional optical magnification. Claim 10 A method according to claim 1, wherein the lens member includes a near-field viewing reference point and at least one holographic optical element is recorded to extend through the near-field viewing reference point. Claim 11 A lens member comprising - a first optical surface having a surface design, - a second optical surface to be manufactured, and - a plurality of non-adjacent holographic optical elements positioned along a set of concentric rings, wherein the holographic optical elements are designed to focus a portion of a light beam passing at a given distance from the retina of the eye. Claim 12 In claim 11, a lens member wherein at least one of the non-adjacent holographic optical elements extends through the geometric center of the first optical plane. Claim 13 A lens member according to claim 11 or 12, wherein at least one of the non-adjacent holographic optical elements is disposed on the first optical plane. Claim 14 A lens member according to claim 11 or 12, wherein at least one of the non-adjacent holographic optical elements is disposed between the first optical surface and the second optical surface. Claim 15 delete

Images