Myopia prevention and control lens and glasses for preventing and controlling myopia

Abstract

The present invention relates to the technical field of myopia prevention and control, and in particular to a myopia prevention and control lens and glasses for preventing and controlling myopia. The myopia prevention and control lens comprises: a lens substrate and, provided on the lens substrate, a central optical area and a control area surrounding the periphery of the central optical area; the control area is provided with a plurality of optical microstructure units, and the optical microstructure units are arranged in a non-periodic manner in the control area; the optical microstructure units are used for changing the incident angle of light.

Description

Myopia prevention and control lenses and glasses for preventing and controlling myopia

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 25, 2023, with application number 202311083397.0 and invention name “Myopia prevention and control lenses and glasses for preventing and controlling myopia”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of myopia prevention and control, and in particular to myopia prevention and control lenses and glasses for preventing and controlling myopia. Background Art

[0003] In recent years, with the rapid development of electronic information technology, the burden of close-up eye use has increased, leading to a rising incidence of myopia, especially among adolescents and children. As of 2020, the overall myopia rate among Chinese adolescents was 52.7%, including 14.3% among six-year-olds, 35.6% among elementary school students, 71.1% among junior high school students, and 80.5% among high school students. The prevention and control of myopia is gaining increasing attention.

[0004] At present, a generally accepted theory for myopia prevention and control is the optical defocus theory, which holds that if the image is focused in front of the retina (i.e., positive defocus), the eye axis is less likely to grow, and myopia is controlled; applying an image focused behind the retina (negative defocus) has the opposite effect. The current mainstream optical means of myopia prevention and control include defocused frame glasses (hereinafter referred to as defocused glasses), orthokeratology (hereinafter referred to as OK glasses), and defocused soft corneal contact lenses (hereinafter referred to as defocused soft lenses). Within the existing theoretical system, all three are believed to delay the progression of myopia through myopic defocus in the peripheral field of view.

[0005] However, clinical practice has shown that the effectiveness of existing optical control methods, such as defocused frame glasses, OK lenses, and defocused soft lenses, decreases over time. To maintain this effectiveness, the control method must be changed. However, even with this change, the effect is only sustained for a limited period. Therefore, how to slow the decline in optical control effectiveness during myopia prevention and control has become a growing concern for those skilled in the art.

[0006] Summary of the Invention

[0007] In order to solve or partially solve the problems existing in the related art, the present invention provides a myopia prevention and control lens and glasses for preventing and controlling myopia.

[0008] The present invention provides a myopia prevention and control lens, comprising: a lens base, wherein the lens base is provided with a central optical zone and a control zone surrounding the periphery of the central optical zone;

[0009] A plurality of optical microstructure units are provided on the control area, and the optical microstructure units are arranged non-periodically in the control area; the optical microstructure units are used to change the incident angle of light.

[0010] Furthermore, the control area is formed by densely paving one, two or more graphic units; among all the graphic units constituting the control area, some of the graphic units form the optical microstructure units; and the remaining graphic units form substrate transparent units.

[0011] Furthermore, the control area is formed by non-periodic paving of one, two or more graphic units.

[0012] Furthermore, the control area is formed by non-periodic paving of graphic units.

[0013] Furthermore, the control area is formed by non-periodic tiling of two types of graphic units.

[0014] Furthermore, the control area is formed by periodically paving one, two or more graphic units.

[0015] Furthermore, the control area is formed by periodically paving a type of graphic unit, and the shape of the graphic unit is a triangle, a convex quadrilateral, a perfect pentagon or a regular hexagon.

[0016] Furthermore, among the plurality of optical microstructure units, some or all of the optical microstructure units have differences in shape and / or size.

[0017] Furthermore, the optical microstructure unit is a combination of one or more of a micro-convex lens, a micro-concave lens, a micro-cylindrical lens, a micro-prism or a free-form surface lens.

[0018] The present invention also provides a pair of glasses for preventing and controlling myopia, which is provided with any one of the myopia prevention and control lenses described above.

[0019] The myopia prevention and control lenses provided by the present invention can have the following beneficial effects:

[0020] The myopia prevention and control lens provided by the present invention is designed with a control area on the periphery of the central optical zone. The control area is provided with a number of optical microstructure units that can change the incident angle of light, and the above-mentioned optical microstructure units are designed to be arranged in a non-periodic manner, so that the position and angle of the light entering the eyeball after refraction through the control area are also irregular. The control area of ​​this design 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 formed by the ideal point light source on the retina of the human eye is anisotropic and different, so that the retina cannot distinguish the correct growth direction of the eyeball in a short time, thereby minimizing the neural adaptation phenomenon of the retina and reducing the decline in optical control efficiency in the process of myopia prevention and control. The myopia prevention and control lens emphasizes the non-periodicity of the position distribution of the optical microstructure units, aiming to achieve the irregularity of the light in the periphery of the visual field, thereby reducing the neural adaptation phenomenon of the retina and delaying the decline in optical control efficiency. Furthermore, by arranging the optical microstructure units and the base transparent units in the control area in a densely packed form, the filling rate can be improved, and the length of the optical interface between different optical structures can be increased to provide strong interference of light propagation to the maximum extent.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0023] FIG1 is a schematic structural diagram of a vision control lens according to an embodiment of the present invention;

[0024] FIG2 is a schematic diagram showing a state in which light enters the eyeball after being refracted through the control area of ​​the vision control lens provided by an embodiment of the present application;

[0025] FIG3 is a schematic diagram of the structure of a graphic unit in the control area of ​​a vision control lens according to another preferred embodiment of the present invention;

[0026] FIG4 is a variant structure of the graphic unit shown in FIG3 ;

[0027] FIG5 is another variant structure of the graphic unit shown in FIG3;

[0028] FIG6 is a partial schematic diagram of the densely packed structure of the control area in another preferred embodiment of the present invention;

[0029] FIG7 is a schematic structural diagram of a vision control lens in another preferred embodiment of the present invention;

[0030] FIG8 is a schematic structural diagram of a vision control lens in another preferred embodiment of the present invention;

[0031] FIG9 is a schematic structural diagram of a graphic unit in the control area of ​​the vision control lens shown in FIG8 of the present invention;

[0032] FIG10 is a Penrose tiling structure formed by the graphic units of FIG9 ;

[0033] Figure 11 is a schematic diagram of tiling of 15 perfect pentagons;

[0034] FIG12 is a schematic structural diagram of a vision control lens in Example 3 of the present invention;

[0035] FIG13 is a schematic diagram of the structure of the graphic unit of the control area in the vision control lens shown in FIG12 of the present invention. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0039] Traditional myopia prevention and control theory holds that when wearing traditional single-vision glasses, the negative refractive power of the lens periphery increases, causing the focal point to shift backwards, known as negative defocus, which stimulates myopia progression. Defocused frame glasses, developed on this basis, are designed with a defocus zone surrounding the central optical zone. This zone is created using micro-convex lenses with a specific geometric distribution. The main function of the defocus zone is to focus external light passing through the micro-convex lenses onto the retina, forming a so-called "positive defocus" image, thereby slowing down axial length growth and myopia progression.

[0040] However, the inventors of this application found in clinical practice that:

[0041] 1) Defocused glasses appear to work differently from orthokeratology lenses in controlling myopia. The reasons are as follows: Most patients whose defocused glasses provided poor myopia control improved after switching to orthokeratology lenses. Meanwhile, some patients whose orthokeratology lenses provided poor results actually achieved excellent myopia control after switching to defocused glasses. Therefore, it is speculated that the principle of myopia control using these microstructures is different from that of orthokeratology lenses.

[0042] 2) Not only convex lenses, but also concave lenses, arranged in the same geometric form, have similar myopia control effects. Existing convex lenses (also known as defocus lenses) are effective not because they focus light in front of the retina, but because they provide more optical convex lenses, disrupting the propagation direction of the original negatively defocused light. This contradicts traditional defocus theory.

[0043] 3) The main reason for the decline in optical control efficiency during myopia prevention and control is the retinal neural adaptation phenomenon. Furthermore, the reason why existing lenses are prone to retinal neural adaptation is that the lenses they use, whether microstructures or microlenses, have artificial traces of artificial distribution in 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 pattern. In addition, the microstructures of existing lenses or the micromorphology of microlenses are mostly simple structures such as circles or ellipses. The above reasons result in less disturbance to vision after light passes through the lenses, which easily leads to retinal neural adaptation, resulting in a decline in control efficiency.

[0044] Based on the above research findings, the inventors of the present application overcame the technical biases existing in the prior art and considered improving the existing defocus lenses, shifting the focus from how to converge all the peripheral light passing through the lens to the front of the retina (or concentrate it on certain areas in the front of the retina) to how to disrupt the direction of the peripheral light passing through the lens as much as possible (regardless of whether the light convergence point is located at the front or back of the retina), that is, to enhance the interference effect on light propagation, so that when the eyeball rotates in different directions, the point spread function formed by the ideal point light source on the retina of the human eye is anisotropic and not exactly the same, thereby minimizing the neural adaptation phenomenon of the retina as much as possible, in the hope that the myopia control effect of the frame lens can be maintained for a longer period of time.

[0045] Based on the above inventive concept, an embodiment of the present invention provides a myopia prevention and control lens. Referring to FIG1 , the myopia prevention and control lens provided in this embodiment includes: a lens substrate 1, wherein the lens substrate 1 is provided with a central optical zone 2 and a control zone 3 surrounding the central optical zone 2;

[0046] A plurality of optical microstructure units 4 are provided on the control area 3 , and the optical microstructure units 4 are arranged non-periodically in the control area 3 ; the optical microstructure units 4 are used to change the incident angle of light.

[0047] In the aforementioned myopia prevention and control lenses, the central optical zone 2 functions similarly to the central optical zone of existing defocus lenses, primarily providing vision correction associated with the wearer's fovea. The lens base 1 can have an overall diameter of 70-75 mm, and the central optical zone 2 can have a diameter ranging from 5 mm to 15 mm. The location, specific dimensions, and refractive index of the central optical zone 2 on the lens base 1 can be selected and set based on the wearer's individual needs.

[0048] The control zone 3 is positioned outside the central optical zone 2. Within this area, several optical microstructure units 4 are arranged to alter the incident angle of light. These optical microstructure units 4 are designed to be arranged in a non-periodic pattern. Consequently, the positions and angles at which light enters the eye after being refracted by the control zone 3 are also irregular. Referring to Figure 2, the upper portion of Figure 2 shows the state of light entering the eye after passing through the lens without the control zone, where all light falls behind the retina. The lower portion of Figure 2 shows the state of light entering the eye after passing through the lens with the control zone 3 in place, where the light appears disorganized. Specifically, the function of the control zone 3 is to create strong optical interference at the periphery of the visual field. This causes the point spread function formed by an ideal point light source on the retina to be anisotropic and inconsistent when the eye rotates in different directions. This prevents the retina from quickly discerning the correct growth direction of the eye. This minimizes retinal neural adaptation and reduces the decline in optical control effectiveness during myopia prevention and control. The optical microstructure unit can be a combination of one or more of a micro-convex lens, a micro-concave lens, a micro-cylindrical lens, a micro-prism or a free-form surface lens. It should be noted that the optical microstructure unit 4 in Figure 1 is represented by a circular black dot in the figure. The circular black dot is only used to show the distribution position of the optical microstructure unit 4 in the control area 3, and it does not represent the specific structural form of the optical microstructure unit 4. As a preferred embodiment of this embodiment, among the several optical microstructure units, 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.

[0049] In this application, the area outside the optical microstructure units in the control zone is referred to as the substrate-transparent zone. The substrate-transparent zone is the area of ​​the lens substrate that has not undergone any treatment, and the substrate-transparent units constitute the substrate-transparent zone. The inventors of this application have further discovered that adjacent optical microstructure units, as well as the optical interfaces between adjacent optical microstructures and substrate-transparent units, contribute most significantly to altering the incident angle of light. Therefore, to enhance the optical interference effect, as a preferred embodiment of this application, the optical microstructure units and substrate-transparent units are arranged in a densely packed pattern within the control zone. This densely packed pattern improves the fill factor and increases the length of the aforementioned optical interfaces, thereby providing maximum interference with light propagation.

[0050] Preferably, the control area is formed by tessellation of one, two, or more types of graphic units; of all the graphic units constituting the control area, some form the optical microstructure units, and the remaining form the substrate-transparent units. Those skilled in the art will appreciate that the distribution of these graphic units constituting the optical microstructure units on the control area should be non-periodic. The tessellation can be either aperiodic or periodic.

[0051] The preferred embodiments of the present invention are described below in two situations:

[0052] Case 1: The control area is formed by non-periodic tessellation of one, two, or more types of graphic units. In this structure, the selection of which graphic units constitute the optical microstructure units can be done randomly, manually, or by computer software. This provides greater flexibility and eliminates the need to deliberately avoid situations where the optical microstructure units form a regular arrangement.

[0053] In another embodiment, the non-periodic paving refers to splicing the above-mentioned graphic units so that the entire control area plane is covered without gaps and without overlap; and the arrangement of the graphic units does not follow any periodic pattern; the non-periodic paving refers to splicing the above-mentioned graphic units so that the entire control area plane is covered without gaps and without overlap; and the arrangement of the graphic units does not follow any periodic pattern.

[0054] Specifically, the control area can be formed by a non-periodic tiling of a graphic unit. At the end of March 2023, David Smith, Joseph Samuel Myers, Craig S. Kaplan and Chaim Goodman-Strauss announced the discovery of a graphic unit that can achieve single-graphic tiling. The graphic unit is a thirteen-sided polygon that looks like a hat. In this case, it is assumed that the two mirror-symmetrical graphics are graphics of the same shape. In the early morning of May 30, 2023, David Smith, Joseph Samuel Myers and four others published a new 23-page paper Achiral aperiodic monotile, which announced a graphic unit that can be non-periodic tiling only by rotation and translation without the help of mirror symmetry. They named it "Spectre" (temporarily translated as "ghost", and this tiling is temporarily called "ghost tiling"). Kaplan et al. subsequently discovered that the previously discovered "Spectre" wasn't the only single-shaped figure capable of achieving conditional aperiodic tiling. Instead, it was an infinite set of graphic units. By adjusting the sides of the aforementioned hat-shaped figure according to certain rules, similar figures could be generated that also met the conditional aperiodic tiling requirement. The aforementioned hat-shaped tridecagon, "Spectre," and its derivative series of figures, as well as variants based on the aforementioned graphic units, can all serve as the graphic units constituting the controlled area of ​​this application.

[0055] As a preferred solution of this embodiment, the structure of the graphic unit can be as shown in Figure 3, wherein the graphic unit is a thirteen-sided polygon, which is a closed pattern formed by sequentially connecting the first short side AB, the second short side BC, the third short side CD, the fourth short side DE, the fifth short side EF, the sixth short side FG, the seventh short side GH, the eighth short side HI, the ninth short side IJ, the first long side JK, the tenth short side KL, the eleventh short side LM and the twelfth short side MA, wherein the inner angle between the first short side AB and the second short side BC is 120°, the inner angle between the second short side BC and the third short side CD is 270°, the inner angle between the third short side CD and the fourth short side DE is 120°, and the fourth short side DE and the fifth short side are 120°. The internal angle between the fifth short side EF is 90°, the internal angle between the fifth short side EF and the sixth short side FG is 240°, the internal angle between the sixth short side FG and the seventh short side GH is 90°, the internal angle between the seventh short side GH and the eighth short side HI is 240°, the internal angle between the eighth short side HI and the ninth short side IJ is 90°, the internal angle between the ninth short side IJ and the first long side JK is 120°, the internal angle between the first long side JK and the tenth short side KL is 120°, the internal angle between the tenth short side KL and the eleventh short side LM is 270°, the internal angle between the eleventh short side LM and the twelfth short side MA is 120°, and the internal angle between the twelfth short side MA and the first short side AB is 90°. Based on the graphic unit shown in Figure 3, the graphic units shown in Figures 4 and 5 obtained by performing variations can also achieve non-periodic tessellation. In the myopia prevention lens shown in Figure 7, the control area 3 is formed by tessellation of the graphic units shown in Figure 4. A partial enlarged view of the tessellation state of the control area is shown in Figure 6. The different colored graphic units in Figure 6 are only used to illustrate the random distribution characteristics of the non-periodic tessellation units and are not used to distinguish between optical microstructure units and substrate see-through units. Within this control area, some graphic units are selected randomly, manually, or by computer software as optical microstructure units, while the remaining graphic units are used as substrate see-through units.

[0056] The control area can also be formed by two types of graphic units in a non-periodic paving. Specifically, the control area can be formed by two types of graphic units in a Penrose paving. Figure 8 shows the structure of a preferred embodiment of a vision control lens. Specifically, the control area 3 of the vision control lens is formed by two types of graphic units in a non-periodic paving. Please refer to Figure 9. The two graphic units are graphic units a and b. Graphic units a and b are composed of a rhombus with internal angles of 72° and 108°, and are divided into a graphic unit a (similar to a dart shape) and a graphic unit b (similar to a kite shape) in the manner shown in Figure 9 (that is, the rhombus is divided according to the dividing line L, and the dividing line NOP is composed of the dividing line NO and the dividing line OP; starting from a 108° internal angle end, extending toward a 72° internal angle end to the intersection with the two 72° internal angle connection lines, forming a dividing line NO, and the dividing line OP and the dividing line NO are symmetrically arranged along the internal angle connection line). The specific structure of the graphic unit a is as follows: the waist length is The base center of an isosceles triangle with a vertex angle of 72° is concave inward toward the vertex to form a quadrilateral. The side lengths of the quadrilateral are l, l, The interior angles are 72°, 36°, 216°, and 36° respectively; the specific structure of graphic unit b is as follows: the waist length is The base center of an isosceles triangle with a vertex angle of 72° is convex outward to form a quadrilateral with side lengths of l, l, The interior angles are 72°, 72°, 144°, and 72°, respectively. The Penrose tiling structure formed by graphic units a and b is shown in Figure 10 . In this structure, graphic units b (i.e., the light gray graphic units in Figure 10 ) are preferably designed as optical microstructure units, and graphic units a (i.e., the dark gray graphic units in Figure 10 ) are designed as base see-through units. Of course, it is also possible to select some graphic units a and / or graphic units b as optical microstructure units through random selection, manual selection, or technical computer software, while the remaining graphic units are used as base see-through units.

[0057] In addition, the control area can also be formed by non-periodic tiling of multiple graphic units, for example, non-periodic tiling of 6, 92 or 20426 types of graphic units.

[0058] Case 2: The control area is formed by periodically tiling one, two, or more types of graphic units. In this structure, the selection of which graphic units constitute the optical microstructure units can be done randomly, manually, or by computer software. It is necessary to deliberately avoid situations where the optical microstructure units form a regular arrangement.

[0059] Specifically, the control area is formed by periodically tiling a pattern of units, which can be in the shape of triangles, convex quadrilaterals, perfect pentagons, or regular hexagons, with perfect pentagons being more preferred. To date, 15 perfect pentagons have been discovered, and their tiling diagrams are shown in Figure 11. Compared to other shapes, perfect pentagons are more irregular, which helps increase light interference intensity.

[0060] From the above, it can be seen that the myopia prevention and control lenses provided by the embodiments of the present invention have the following advantages:

[0061] The myopia prevention and control lens provided in this embodiment has a control area outside the central optical zone, and a number of optical microstructure units that can change the incident angle of light are set on the control area, and the above-mentioned optical microstructure units are designed to be arranged in a non-periodic manner, so that the position and angle of light entering the eye after being refracted through the control area are also irregular. The control area of ​​this design 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 formed by the ideal point light source on the human eye retina is anisotropic and different, so that the retina cannot distinguish the correct growth direction of the eyeball in a short time, thereby minimizing the neural adaptation of the retina and reducing the decline in optical control efficiency during myopia prevention and control. The myopia prevention and control lens emphasizes the non-periodicity of the position distribution of the optical microstructure units, aiming to achieve irregularity of the light in the periphery of the visual field, thereby reducing the neural adaptation of the retina and delaying the decline in optical control efficiency. Furthermore, by arranging the optical microstructure units and the base transparent units in a densely packed form in the control area, the filling rate can be improved, and the length of the optical interface between different optical structures can be increased to provide strong interference of light propagation to the maximum extent.

[0062] On the other hand, an embodiment of the present invention also provides a pair of glasses for preventing and controlling myopia, which is provided with the myopia prevention and control lenses described in any of the above embodiments. Its specific implementation methods and beneficial effects are the same as those of the myopia prevention and control lenses, and will not be repeated here.

[0063] The technical solution of the present invention will be further described below in conjunction with specific embodiments:

[0064] Example 1 - Penrose tessellated structural control area

[0065] The structure of the myopia prevention and control lens provided in this embodiment is shown in FIG8 . The control area is formed by Penrose tiling of the graphic unit a and the graphic unit b divided by the rhombus shown in FIG9 . The side length of the rhombus is The cross section is an arc, with graphic unit a as the base transparent unit and graphic unit b as the optical microstructure unit. The dense paving state is shown in Figure 10. The five enclosed graphic units b can form a microstructure that is approximately a 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 sagitta of the rhombus used to form graphic unit b is 0.60μm. Taking into account the coating processing accuracy and the submergence of the microstructure during the coating process, the sagitta of the curved section can be achieved at 1.0-1.3μm. It should be pointed out that in the light gray filling area where a near-circular shape is not formed, the microstructure still has the effect of disrupting the propagation of light. In this case, it is a prism effect rather than a convex lens.

[0066] Example 2 - Ghost tessellation control area

[0067] The structure of the myopia prevention and control lens provided in this embodiment is shown in Figure 7. The control area is formed by the ghost paving of the graphic units shown in Figure 4, and the paving state is shown in Figure 6. The refractive index of the lens is 1.67. The long side size of the graphic unit is 400μm. The dark gray and light gray graphic units in Figure 7 are combined as the base transparent unit, and the remaining graphic units are used as optical microstructure units. For the optical microstructure unit, the sagittal height at the center point O of the structure is 1.5μm. The central vertex and the points on all edges of the microstructure are connected with arcs to form a free-form surface microstructure. Taking into account the coating processing accuracy and the submergence of the microstructure during the coating process, the sagittal height of the curve section can be 2.5μm.

[0068] Example 3 - Perfect Pentagonal Structure Control Area

[0069] The structure of the myopia prevention and control lens provided in this embodiment is shown in Figure 12. The control area is formed by the perfect pentagon tiling shown in Figure 13. The dimensions of the perfect pentagon are as follows: internal 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, and c = 386.4μm are set. Some perfect pentagons are randomly selected as optical structural units. The optical structural unit is formed by cutting a convex lens. The cosine theorem shows that AD = 582μm. If AD is used as the chord length and a lens with a refractive index of 1.74 and a refractive power of +50.00D is made, the sagitta is 2.9μm. Taking into account the submergence of the coating, the sagitta can be processed to 6μm.

[0070] Example 4 - Perfect Pentagonal Structure Control Area

[0071] The structure of the myopia prevention and control lens provided in this embodiment is the same as that in Example 3, and the side length and internal angle of the perfect pentagon are the same. Similarly, some perfect pentagons are randomly selected as optical structural units, and the optical structural units are formed by cutting convex lenses. The difference from Example 3 is that the refractive index of the convex lenses is not exactly the same; specifically, a convex lens with a refractive index of 1.74 and a refractive power distribution range of +3.00D to +15.0D is made, and the range of the sagittal height is 0.17μm to 0.86μm. Considering the submergence of the coating, the sagittal height can be processed to the range of 0.3μm to 1.5μm.

[0072] While various embodiments of the present invention have been described above, the above descriptions are intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A myopia prevention and control lens, characterized in that: It includes: A lens substrate, wherein a central optical zone and a control zone surrounding the periphery of the central optical zone are arranged on the lens substrate; A plurality of optical microstructure units are arranged on the control area, and the optical microstructure units are arranged non-periodically in the control area; the optical microstructure units are used to change the incident angle of light.

2. The myopia prevention and control lens according to claim 1, characterized in that: The control area is formed by densely paving one, two or more graphic units; among all the graphic units constituting the control area, some of the graphic units form the optical microstructure units; and the remaining graphic units form substrate transparent units.

3. The myopia prevention and control lens according to claim 2, characterized in that: The control area is formed by non-periodic paving of one, two or more graphic units.

4. The myopia prevention and control lens according to claim 3, characterized in that: The control area is formed by non-periodic paving of graphic units.

5. The myopia prevention and control lens according to claim 3, characterized in that: The control area is formed by non-periodic paving of two types of graphic units.

6. The myopia prevention and control lens according to claim 2, characterized in that: The control area is formed by periodically paving one, two or more graphic units.

7. The myopia prevention and control lens according to claim 6, characterized in that: The control area is formed by periodically paving a type of graphic unit, and the shape of the graphic unit is a triangle, a convex quadrilateral, a perfect pentagon or a regular hexagon.

8. The myopia prevention and control lens according to claim 1, characterized in that: Among the plurality of optical microstructure units, some or all of the optical microstructure units have differences in shape and / or size.

9. The myopia prevention and control lens according to claim 1, characterized in that: The optical microstructure unit is a combination of one or more of a micro-convex lens, a micro-concave lens, a micro-cylindrical lens, a micro-prism or a free-form surface lens.

10. The myopia prevention and control lens according to claim 1, characterized in that: The control area is formed by non-periodic paving of one, two or more graphic units; the non-periodic paving means that the above-mentioned graphic units are spliced ​​so as to cover the entire control area plane without gaps and overlaps; and the arrangement of the graphic units does not follow any periodic pattern; among all the graphic units constituting the control area, some of the graphic units form optical microstructure units; and the remaining graphic units form base see-through units; The optical microstructure unit is used to change the incident angle of light, so that the position and angle of the light entering the eyeball after being refracted through the control area are irregular.

11. The myopia prevention and control lens according to claim 1, characterized in that: The control area is formed by a non-periodic tiling of a type of graphic unit; the graphic unit is a Spectre graphic unit constituting a Spectre tiling, a series of graphics derived from the Spectre graphic unit, or a variant based on the Spectre graphic unit.

12. The myopia prevention and control lens according to claim 1, characterized in that: The control area is formed by non-periodic tiling of a type of graphic unit; the graphic unit is a hat-shaped thirteen-sided polygon or a variant based on the thirteen-sided polygon; The thirteen-sided polygon is a closed pattern formed by sequentially connecting the first short side AB, the second short side BC, the third short side CD, the fourth short side DE, the fifth short side EF, the sixth short side FG, the seventh short side GH, the eighth short side HI, the ninth short side IJ, the first long side JK, the tenth short side KL, the eleventh short side LM and the twelfth short side MA, wherein the inner angle between the first short side AB and the second short side BC is 120°, the inner angle between the second short side BC and the third short side CD is 270°, the inner angle between the third short side CD and the fourth short side DE is 120°, the inner angle between the fourth short side DE and the fifth short side EF is 90°, and the fifth short side EF and The inner angle between the sixth short side FG is 240°, the inner angle between the sixth short side FG and the seventh short side GH is 90°, the inner angle between the seventh short side GH and the eighth short side HI is 240°, the inner angle between the eighth short side HI and the ninth short side IJ is 90°, the inner angle between the ninth short side IJ and the first long side JK is 120°, the inner angle between the first long side JK and the tenth short side KL is 120°, the inner angle between the tenth short side KL and the eleventh short side LM is 270°, the inner angle between the eleventh short side LM and the twelfth short side MA is 120°, and the inner angle between the twelfth short side MA and the first short side AB is 90°.

13. The myopia prevention and control lens according to claim 1, characterized in that: The control area is paved with two types of graphic units to form a Penrose tiling.

14. The myopia prevention and control lens according to claim 13, characterized in that: The two graphic units are graphic units a and b, respectively. Graphic units a and b are formed by dividing a rhombus with internal angles of 72° and 108° in the following manner: The rhombus is divided according to the dividing lines, the dividing lines are composed of the dividing line NO and the dividing line OP; starting from a 108° inner angle end, extending toward a 72° inner angle end to the intersection with the two 72° inner angle connection lines to form a dividing line NO, and the dividing line OP and the dividing line NO are symmetrically arranged along the inner angle connection line; The specific structure of the graphic unit a is as follows: the waist length is An isosceles triangle with a vertex angle of 72° The center of the bottom side of the shape is concave inward toward the vertex to form a quadrilateral, and the side lengths of the quadrilateral are l、l、 The interior angles are 72°, 36°, 216°, and 36°; The specific structure of the graphic unit b is as follows: the waist length is The base center of an isosceles triangle with a vertex angle of 72° is convex to form a quadrilateral with the sides convex outwards away from the vertex angle. l、l、 The internal angles are 72°, 72°, 144°, and 72° respectively.

15. A pair of glasses for preventing and controlling myopia, characterized in that: It is provided with the myopia prevention and control lens according to any one of claims 1 to 14.

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