Myopia control spectacle lenses and eyeglasses for myopia control

Abstract

The present application relates to myopia prevention and control technical field, especially in myopia prevention and control lens and for preventing and controlling myopia glasses.The myopia prevention and control lens includes: lens base, the lens base is provided with central optical area, and the control area is arranged around the periphery of the central optical area;The control area is provided with a plurality of optical microstructure units, and the optical microstructure unit is arranged in the control area non-periodically;The optical microstructure unit is used to change the incident angle of light.The myopia prevention and control lens emphasizes the non-periodicity of optical microstructure unit position distribution, aims at realizing the irregularity of visual field periphery light, thereby reducing the neural adaptation phenomenon of retina, and delaying the decline of optical control efficiency.

Description

[0001] This application is a divisional application of the following application: filed on August 25, 2023, application number 202311083397.0, entitled Myopia Prevention Lens and Glasses for Myopia Prevention. Technical Field

[0002] This invention relates to the field of myopia prevention and control technology, and more particularly to myopia prevention and control lenses and eyeglasses for myopia prevention and control. Background Technology

[0003] In recent years, with the rapid development of electronic information technology, the visual load from close-range use has increased, leading to a higher incidence of myopia, especially among teenagers and children. How to prevent and control myopia has become an increasingly important concern.

[0004] Currently, the most widely accepted theory for myopia control is the optical defocus theory. This theory posits that if an image is focused in front of the retina (positive defocus), the axial length of the eye is less likely to grow, thus controlling myopia; conversely, focusing the image behind the retina (negative defocus) has the opposite effect. The mainstream optical methods for myopia control currently include defocused eyeglasses (hereinafter referred to as defocus lenses), orthokeratology lenses (hereinafter referred to as OK lenses), and defocused soft contact lenses (hereinafter referred to as defocus soft lenses). Within the existing theoretical framework, all three are considered to slow the progression of myopia by causing myopic defocus in the peripheral visual field.

[0005] However, clinical practice has revealed that existing optical control methods, such as defocused eyeglasses, orthokeratology (Ortho-k) lenses, and defocused soft lenses, experience a decline in control effectiveness over time. Maintaining this effectiveness requires changing the control method, but even then, the control effect only lasts for a limited period. Therefore, how to slow down the decline in optical control effectiveness during myopia prevention and control has become an increasingly important issue for those skilled in the art. Summary of the Invention

[0006] To address or partially address the problems existing in related technologies, this invention provides a myopia control lens and eyeglasses for myopia control.

[0007] The present invention provides a myopia control lens, comprising: a lens substrate, wherein a central optical zone is disposed on the lens substrate, and a control zone surrounding the periphery of the central optical zone;

[0008] The control area is formed by periodically tiling one, two, or more graphic units; among all the graphic units constituting the control area, some graphic units form optical microstructure units, and the remaining graphic units form substrate transparent units; the optical microstructure units are arranged non-periodically in the control area.

[0009] The optical microstructure units are used to change the incident angle of light, so that the position and angle of the light entering into the eyeball after refraction by the control area are in a random state.

[0010] Further, the control area is formed by periodically densely arranging a pattern unit, and the pattern unit has a shape of a triangle, a convex quadrilateral, a perfect pentagon or a regular hexagon.

[0011] Further, the optical microstructure units have differences in shape and / or size.

[0012] Further, the optical microstructure units are one or more combinations of a micro convex lens, a micro concave lens, a micro column lens, a micro prism or a free-form surface lens.

[0013] The application also provides an eyeglass for preventing and controlling myopia, which is provided with the myopia prevention and control lens.

[0014] The application also provides an eyeglass for preventing and controlling myopia, which is provided with the myopia prevention and control lens.

[0015] The myopia prevention and control lens provided by the application can have the following beneficial effects:

[0016] The myopia prevention and control lens provided by the application has a control area designed outside the central optical area, the control area is provided with a plurality of optical microstructure units capable of changing the incident angle of light, and the optical microstructure units are designed in a non-periodic arrangement, so that the position and angle of the light entering into the eyeball after refraction by the control area are also in a random state. The designed control area can form strong optical interference in the periphery of the visual field, so that when the eyeball rotates in different directions, the point spread function of the ideal point light source formed on the retina of the human eye has anisotropy and is not the same, so that the retina cannot determine the correct growth direction of the eyeball in a short time, thereby reducing the phenomenon of neural adaptation of the retina and reducing the decline of the optical control efficiency in the process of preventing and controlling myopia. The myopia prevention and control lens emphasizes the non-periodicity of the position distribution of the optical microstructure units, aiming to realize the irregularity of the light in the periphery of the visual field, thereby reducing the phenomenon of neural adaptation of the retina and delaying the decline of the optical control efficiency. Further, by densely arranging the optical microstructure units and the base transparent units in the control area, the filling rate can be improved, the length of the optical interface between different optical structures can be increased, and the strong interference of light propagation can be maximized.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters designate like elements in the various figures.

[0019] Figure 1 is a structural schematic diagram of a vision-prevention lens according to an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the state of light rays passing through the control area of the vision-prevention lens according to an embodiment of the present application and entering the eyeball after refraction;

[0021] Figure 3 is a structural schematic diagram of the graphic unit of the control area of a vision-prevention lens according to another preferred embodiment of the present application;

[0022] Figure 4 is a variant structure of the graphic unit shown in Figure 3

[0023] Figure 5 is another variant structure of the graphic unit shown in Figure 3

[0024] Figure 6 is a partial schematic diagram of the close-packed structure of the control area in another preferred embodiment of the present application;

[0025] Figure 7 is a structural schematic diagram of a vision-prevention lens according to another preferred embodiment of the present application;

[0026] Figure 8 is a structural schematic diagram of a vision-prevention lens according to another preferred embodiment of the present application;

[0027] Figure 9 is a structural schematic diagram of the graphic unit of the control area of a vision-prevention lens according to Figure 8

[0028] is a Penrose close-packed structure formed by the graphic unit of Figure 10 Figure 9

[0029] Figure 11 is a schematic diagram of the close-packing of 15 perfect pentagons;

[0030] Figure 12 is a structural schematic diagram of a vision-prevention lens according to Embodiment 3 of the present application;

[0031] Figure 13 is a structural schematic diagram of the graphic unit of the control area of a vision-prevention lens according to Figure 12 DETAILED DESCRIPTION ​​​​​

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0033] The terms used in the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0034] It should be understood that although the terms "first", "second", "third" and the like can be employed in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0035] The traditional myopia prevention and control theory believes that when wearing traditional single-vision glasses, the negative lens power of the periphery of the lens will be more, causing the focus to move backward, i.e. negative defocus, and the negative defocus will stimulate myopia growth. On this basis, the defocus type frame glasses are developed, which are designed to set a defocus zone around the central optical zone, and the defocus zone is made by using a micro convex lens through a certain form of geometric distribution. The main function of the defocus zone is to form a so-called "positive defocus" image according to the defocus principle, that is, the external light will converge to the retina through the micro convex lens, so as to achieve the purpose of delaying the axial growth and deepening myopia.

[0036] However, the present inventors found in clinical practice that:

[0037] 1) The defocus type frame glasses seem to be inconsistent with the myopia control principle of orthokeratology lenses, for the following reasons: the control effect of the defocus type frame glasses is not good, and the control effect of most of them is improved after replacing the orthokeratology lenses; and some patients with poor orthokeratology lens effect surprisingly achieve good control effect after replacing the defocus type frame glasses. Therefore, it is speculated that the principle of controlling myopia by such microstructure should be different from that of orthokeratology lenses.

[0038] 2) Not only the micro convex lens, the micro concave lens in the same geometric form of the arrangement, also has similar myopia control effect of the micro convex lens. The reason why the existing micro convex lens lens (ie, defocus lens) is effective is not to converge light in front of the retina, but to provide more optical micro convex lens interference with the original negative defocus light propagation direction. This is contrary to the traditional defocus theory.

[0039] 3) The main reason for the decline in optical control efficiency in the process of myopia prevention and control is the neural adaptation of the retina. Further, the reason why the existing lens is prone to neural adaptation of the retina is that the lens used, whether microstructure or micro lens, has artificial traces in the distribution of the peripheral part of the lens, that is, there is a certain degree of geometric consistency, or spatial distribution consistency, or some obvious spatial distribution rule, plus the microstructure or micro lens of the existing lens is mostly simple structure such as circle or ellipse; The above reasons cause the light to pass through the lens to produce small disturbance to the vision, which is easy to form the neural adaptation of the retina, resulting in a decline in control efficiency.

[0040] Based on the above research findings, the present inventors overcome the technical bias in the prior art and consider improving the existing defocus lens by shifting the focus from how to converge the peripheral light passing through the lens to the front end of the retina (or concentrating on some area at the front end of the retina) to how to disrupt the direction of the peripheral light passing through the lens as much as possible (not concerned about whether the light convergence point is located at the front end or the back end of the retina), that is, to enhance the interference effect on the light propagation, so that the point spread function of the ideal point light source on the human eye retina has anisotropy and is not the same when the eyeball rotates in different directions, so as to minimize the neural adaptation of the retina, so as to expect the myopia control effect of the frame lens to be maintained for a long period of time.

[0041] Based on the above invention concept, the present embodiment provides a myopia prevention and control lens, please see Figure 1 The myopia prevention and control lens provided by the present embodiment comprises a lens substrate 1, a central optical area 2 is arranged on the lens substrate 1, and a control area 3 is arranged around the periphery of the central optical area 2.

[0042] A plurality of optical microstructure units 4 are arranged on the control area 3, and the optical microstructure units 4 are arranged in a non-periodic manner in the control area 3; the optical microstructure units 4 are used to change the incident angle of light.

[0043] In the aforementioned myopia control lenses, the central optical zone 2 functions the same as the central optical zone in existing defocus lenses, primarily providing vision correction related to the central fovea of ​​the eyeglass wearer. The total diameter of the lens base 1 can be 70-75mm, and the diameter of the central optical zone 2 can range from 5mm to 15mm. The position, specific size, and refractive index of the central optical zone 2 on the lens base 1 can be selected and set according to the individual conditions of the eyeglass wearer.

[0044] The aforementioned control area 3 is located around the central optical area 2. Several optical microstructure units 4 capable of altering the incident angle of light are arranged within this area. These optical microstructure units 4 are designed in a non-periodic arrangement, thus the position and angle at which light enters the eyeball after refraction through the control area 3 are also irregular. Please refer to [link to relevant documentation]. Figure 2 , Figure 2 The upper middle section shows the state of light entering the eyeball after passing through the lens when no control area is set. At this time, all the light falls behind the retina. Figure 2 The lower middle section represents the state of light entering the eyeball after passing through the lens following the setting of control area 3 as shown in this embodiment. At this time, the light appears chaotic. The function of control area 3 is to create strong optical interference at the periphery of the visual field. This causes the point spread function formed by the ideal point light source on the retina to be anisotropic and not identical when the eyeball rotates in different directions. This prevents the retina from quickly distinguishing the correct growth direction of the eyeball, thereby minimizing retinal neural adaptation and reducing the decline in optical control efficiency during myopia prevention. The optical microstructure unit can be one or more combinations of microconvex lenses, microconcave lenses, microcylindrical lenses, microprisms, or freeform lenses. It should be noted that... Figure 1 In the figure, the optical microstructure unit 4 is represented by a circular black dot. This circular black dot is only used to show the distribution position of the optical microstructure unit 4 in the control area 3, and does not represent the specific structural form of the optical microstructure unit 4. As a preferred embodiment, some or all of the optical microstructure units have differences in shape and / or size. In addition, the size of the above-mentioned optical microstructure unit is preferably 50μm to 2500μm.

[0045] In the present application, the area in the control region other than the optical microstructure unit is referred to as the substrate transparent area, which is the area that has not been treated on the lens substrate, and the substrate transparent unit constitutes the substrate transparent area. The present inventors have further found that the optical interfaces between adjacent optical microstructure units and between adjacent optical microstructure and substrate transparent units contribute most to the change in the incident angle of light. Therefore, in order to enhance the optical interference effect, as a preferred embodiment of the present application, the optical microstructure units and the substrate transparent units are arranged in a dense manner in the control region. The dense arrangement can increase the filling rate and the length of the above-mentioned optical interfaces to provide the most interference for the propagation of light.

[0046] Preferably, the control region is formed by one, two or more types of pattern units; among all the pattern units constituting the control region, part of the pattern units form the optical microstructure units and the rest form the substrate transparent units. Those skilled in the art can understand that the distribution of the part of the pattern units used to constitute the optical microstructure units on the control region should be aperiodic. The above-mentioned dense arrangement can be aperiodic dense arrangement or periodic dense arrangement. The preferred embodiments of the present application are described below in two cases:

[0047] Case one: the control region is formed by one, two or more types of pattern units in a non-periodic dense arrangement. In this structure, the selection of which pattern units constitute the optical microstructure units can be random, manual or technical computer software selection, and the selection flexibility is relatively large, without the need to deliberately avoid the situation that the optical microstructure units form a regular arrangement.

[0048] Specifically, the control area can be formed by aperiodic tiling of a single tile. In late March 2023, David Smith, Joseph Samuel Myers, Craig S. Kaplan and Chaim Goodman-Strauss announced the discovery of a single tile that can achieve aperiodic tiling, which is a thirteen-sided shape resembling a hat, in which case the two mirror-symmetric tiles are the same shape. On the morning of May 30, 2023, David Smith, Joseph Samuel Myers and three others published a 23-page new paper titled Achiral aperiodic monotile, in which they announced a single tile that can be aperiodically tiled by rotation and translation alone, without the aid of mirror symmetry, which they named "Spectre" (tentatively translated as "ghost", and this tiling is tentatively called "ghost tiling"). Subsequently, Kaplan et al. discovered that the previously discovered "Spectre" is not the only single tile that can achieve aperiodic tiling of a single tile, but rather an infinite set of tile sets, which are generated by adjusting the edges of the hat-shaped single tile under certain rules, and the similar shapes also satisfy the condition of aperiodic tiling. The aforementioned hat-shaped thirteen-sided shape, "Spectre", and the derived series of shapes, as well as the variants based on the aforementioned tile, can all be used as the aforementioned tile to construct the control area of the present application.

[0049] As a preferred embodiment of the present embodiment, the structure of the tile can be as follows Figure 3As shown, the graphic unit is a triskaidekagon, which is a closed pattern formed by sequentially connecting a first short side AB, a second short side BC, a third short side CD, a fourth short side DE, a fifth short side EF, a sixth short side FG, a seventh short side GH, an eighth short side HI, a ninth short side IJ, a first long side JK, a tenth short side KL, an eleventh short side LM, and a twelfth short side MA, wherein an inner angle between the first short side AB and the second short side BC is 120°, an inner angle between the second short side BC and the third short side CD is 270°, an inner angle between the third short side CD and the fourth short side DE is 120°, an inner angle between the fourth short side DE and the fifth short side EF is 90°, an inner angle between the fifth short side EF and the sixth short side FG is 240°, an inner angle between the sixth short side FG and the seventh short side GH is 90°, an inner angle between the seventh short side GH and the eighth short side HI is 240°, an inner angle between the eighth short side HI and the ninth short side IJ is 90°, an inner angle between the ninth short side IJ and the first long side JK is 120°, an inner angle between the first long side JK and the tenth short side KL is 120°, an inner angle between the tenth short side KL and the eleventh short side LM is 270°, an inner angle between the eleventh short side LM and the twelfth short side MA is 120°, and an inner angle between the twelfth short side MA and the first short side AB is 90°. Figure 3 Based on the graphic unit shown in Figure 4 and Figure 5 the graphic unit shown in can also achieve aperiodic tiling. Figure 7 In the myopia control lens shown in, the control area 3 is formed by tiling the graphic units shown in. Figure 4 A local enlarged view of the tiling state of the control area is shown in. Figure 6 Figure 6 Different colors of graphic units in the above figures are only used to show the random distribution characteristics of aperiodic tiling units, and are not used to distinguish optical microstructure units and substrate transparent units. In the control area, part of the graphic units are selected as optical microstructure units by random selection, manual selection, or technical computer software selection, and the remaining graphic units are selected as substrate transparent units.

[0050] The control area can also be formed by aperiodic tiling of two graphic units, specifically, the control area can be formed by Penrose tiling of two graphic units. Figure 8 The structure of a preferred embodiment of a myopia control lens is shown, specifically, the control area 3 of the myopia control lens is formed by aperiodic tiling of two graphic units, please refer to Figure 9 , the two graphic units are graphic units a and b, and the graphic units a and b are a rhombus with inner angles of 72° and 108°, which are tiling according to Figure 9 ​The rhombus is divided into a figure unit a (similar to a dart shape) and a figure unit b (similar to a kite shape) in the illustrated manner (i.e. the rhombus is divided by a division line L, the division line NOP is composed of a division line NO and a division line OP; the division line NO is formed by extending from a 108° internal angle end to a 72° internal angle end to intersect with two 72° internal angle connecting lines, and the division line OP is symmetrically arranged with the division line NO along the internal angle connecting line). The specific structure of the figure unit a is as follows: a quadrangle formed by internally recessing the center of the base side of an isosceles triangle with a waist length of φ and a top angle of 72° in the direction of the top angle, the side length of the quadrangle is φ, l, l, and φ respectively, and the internal angle is 72°, 36°, 216°, and 36° respectively; the specific structure of the figure unit b is as follows: a quadrangle formed by externally protruding the center of the base side of an isosceles triangle with a waist length of φ and a top angle of 72° in the direction away from the top angle, the side length of the quadrangle is φ, l, l, and φ respectively, and the internal angle is 72°, 72°, 144°, and 72° respectively; and the above φ = (l + √5) / 2. The Penrose tiling structure formed by the figure unit a and the figure unit b is as shown in the figure. Figure 10 In this structure, it is preferred that the figure unit b (i.e. the yellow figure unit in Figure 10 ) is designed as an optical microstructure unit, and the figure unit a (i.e. the red figure unit in Figure 10 ) is designed as a substrate transparent unit. Of course, part of the figure unit a and / or the figure unit b can also be selected as an optical microstructure unit by random selection, manual selection, or technical computer software selection, and the remaining figure units are substrate transparent units.

[0051] In addition, the control area can also be formed by non-periodic tiling of a plurality of figure units, such as 6, 92, or 20426 figure units.

[0052] Case two: the control area is formed by periodic tiling of one, two or more figure units. In this structure, the selection of which figure units to form optical microstructure units can be random selection, manual selection, or technical computer software selection, and the situation that intentionally avoids the formation of regular arrangement of optical microstructure units needs to be avoided.

[0053] Specifically, the control area is formed by periodic tiling of one figure unit, and the shape of the figure unit is a triangle, a convex quadrangle, a perfect pentagon, or a regular hexagon, and more preferably a perfect pentagon. So far, there are 15 perfect pentagons discovered by humans, and the tiling diagram of the 15 perfect pentagons is as shown in the figure. Figure 11 Compared with other shapes, the perfect pentagon has more irregularity in shape, which is beneficial to improve the light interference intensity.

[0054] From the above, it can be seen that the myopia prevention and control lens provided by the embodiment of the present application has the following advantages:

[0055] The myopia prevention and control lens provided by the embodiment is provided with a control area in the peripheral area of the central optical area, a plurality of optical microstructure units capable of changing the incident angle of light are arranged on the control area, and the optical microstructure units are designed in a non-periodic arrangement mode, so that the position and angle of the light entering the eyeball after refraction by the control area are also in a random state. The designed control area can form strong optical interference in the peripheral field of view, so that when the eyeball rotates in different directions, the point spread function of the ideal point light source formed on the retina of the human eye has anisotropy and is not the same, so that the retina cannot determine the correct growth direction of the eyeball in a short time, thereby reducing the phenomenon of neural adaptation of the retina and reducing the decline of the optical control efficiency in the myopia prevention and control process. The myopia prevention and control lens emphasizes the non-periodicity of the position distribution of the optical microstructure units, and aims to realize the irregularity of the peripheral light of the field of view, thereby reducing the phenomenon of neural adaptation of the retina and delaying the decline of the optical control efficiency. Further, by arranging the optical microstructure units and the base transparent units in the control area in a dense arrangement mode, the filling rate can be improved, the length of the optical interface between different optical structures can be increased, and the strong interference of light propagation can be maximized.

[0056] On the other hand, the embodiment of the present application also provides a pair of glasses for preventing and controlling myopia, which is provided with the myopia prevention and control lens of any one of the above-mentioned embodiments, and the specific implementation and beneficial effects thereof are the same as those of the myopia prevention and control lens, which will not be described here.

[0057] The technical solutions of the present application will be further described below in combination with specific embodiments:

[0058] Embodiment 1-Penrose dense arrangement control area

[0059] The structure of the myopia prevention and control lens provided by the embodiment is shown in Figure 8 The control area is formed by Penrose dense arrangement of the graphic unit a and the graphic unit b divided by the rhombus shown in Figure 9 The rhombus has a side length φ = 400 μm, and the cross section is a circular arc. The graphic unit a is taken as a base transparent unit, the graphic unit b is an optical microstructure unit, and the dense arrangement state is shown in Figure 10 The five surrounded graphic units b can form a microstructure of an approximate convex lens, and the refractive power of the convex lens is set to +5.00D. The refractive index of the lens is 1.67, and the vertex height of the rhombus used to form the graphic unit b is 0.60 μm. Considering the coating processing precision and the flooding of the microstructure in the coating process, the curve cross section vertex height can be 1.0-1.3 μm. It should be pointed out that in the yellow filling area which is not formed into a near-circular shape, the microstructure still has the function of disturbing the propagation of light, which is a prism effect rather than a convex lens.

[0060] Embodiment 2-ghost dense arrangement control area

[0061] The structure of the myopia control lens provided in this embodiment is as follows: Figure 7 As shown, the control area consists of Figure 4 The graphic units shown are formed by ghost tiling, and the tiling state is as follows: Figure 6 As shown. The refractive index of the lens is 1.67. The long side dimension of the graphic unit is 400μm. Figure 7 Medium-dark gray and light gray graphic units are combined as the base transparent units, while the remaining graphic units serve as optical microstructure units. For each optical microstructure unit, the sagitta at the structure's center point O is 1.5 μm. The center vertex is connected to all edge points of the microstructure with circular arcs to form a free-form surface microstructure. Considering the coating processing precision and the submersion of the microstructure during the coating process, the sagitta of the curved section can be 2.5 μm.

[0062] Example 3 - Perfect Pentagonal Construction Control Area

[0063] The structure of the myopia control lens provided in this embodiment is as follows: Figure 12 As shown, the control area consists of Figure 13 The perfect pentagons shown are tessellated. The dimensions of the perfect pentagons are as follows: interior angle A = 60°, B = 135°, C = 105°, D = 90°, E = 150°, side length b = d = e = a / 2, c = a / √2(√3-1). In this embodiment, a = 400μm, b = d = e = 200μm, c = 386.4μm are set. A portion of the perfect pentagons is randomly selected as an optical structural unit. This optical structural unit is formed by cutting a convex lens. According to the cosine theorem, AD = 582μm. If AD is used as the chord length to make a lens with a refractive index of 1.74 and a refractive power of +50.00D, the sagitta is 2.9μm. Considering the overlay of the coating, the sagitta can be processed to 6μm.

[0064] Example 4 - Perfect Pentagonal Construction Control Area

[0065] The myopia control lens provided in this embodiment has the same structure as in Embodiment 3, with the same side length and interior angles of the perfect pentagon. Similarly, a portion of the perfect pentagon is randomly selected as the optical structural unit. This optical structural unit is formed by cutting a convex lens. The difference from Embodiment 3 is that the refractive index of the convex lens is not exactly the same; specifically, for a convex lens with a refractive index of 1.74 and a refractive power distribution range of +3.00D to +15.0D, the sagitta range is 0.17μm to 0.86μm. Considering the coating coverage, the sagitta can be processed to a range of 0.3μm to 1.5μm.

[0066] Having described various embodiments of the application, it is to be understood that the above description is meant to be illustrative only and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art, without departing from the scope and spirit of the described embodiments. The choice of words in this document is intended to best explain the principles of the embodiments, the practical application, or improvement over the technology in the art, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A myopia control lens, characterized in that, It includes: A lens substrate having a central optical zone and a control zone surrounding the central optical zone; The control area is formed by periodically tiling together a type of graphic unit; the graphic unit of the control area includes two types, namely optical microstructure units and substrate transparent units; wherein, the optical microstructure units are selected and determined by random selection; the graphic units other than the optical microstructure units in the control area are substrate transparent units; the optical microstructure units are used to change the incident angle of light, so that the position and angle of light entering the eyeball after refraction through the control area are irregular; The shape of the graphic unit is a triangle, a convex quadrilateral, a perfect pentagon, or a regular hexagon; the optical microstructure unit is one or more of a micro-convex lens, a micro-concave lens, a micro-cylindrical lens, a micro-prism, or a freeform surface lens.

2. The myopia control lens according to claim 1, characterized in that, In the optical microstructure unit, some or all of the optical microstructure units have differences in shape and / or size.

3. A pair of glasses for preventing and controlling myopia, characterized in that, It is equipped with the myopia control lens as described in claim 1 or 2.

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