Microstructured spectacle lens and design method therefor

Abstract

A microstructured spectacle lens and a design method therefor, the microstructured spectacle lens comprising: a master lens (10), wherein the master lens (10) has a modulation area (100), and the master lens (10) comprises a first body (101) located in the modulation area (100); and microstructures (20), wherein each microstructure (20) comprises a first lens (201) and a second lens (202); the first lens (201) is connected to the first body (101), and the first lens (201) is configured to cooperate with the first body (101) to form defocusing; the second lens (202) is connected to the first body (101), and the second lens (202) is configured to cooperate with the first body (101) to form defocused spots; and the second lens (202) is connected to the first lens (201) and exposes part of the first body (101), so that the modulation area (100) can simultaneously generate a clear visual signal, a defocus signal, and a defocused spot modulation signal. The spectacle lens of the present application enables the pupils to simultaneously cover the first lenses (201), the second lenses (202) and the first body (101) as much as possible when glancing a microstructure area, thereby providing a wearer with multiple continuous and balanced peripheral retinal stimulation signals, and achieving a stimulation mechanism that inhibits the growth of axial length.

Description

Microstructured spectacle lens and design method thereof

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 21, 2023, with application number 202311219214.3 and application name “A microstructured eyeglass lens and its design method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to, but are not limited to, the field of ophthalmic optics technology, and specifically to a microstructured eyeglass lens and a design method thereof. Background Art

[0003] Many optical interventions result in a decrease in visual quality in the peripheral retinal image. Multifocal peripheral defocus lenses can create defocused areas in the mid-periphery of the retina, resulting in blurred peripheral vision and a decrease in contrast sensitivity in some frequency bands during the initial wear period. Therefore, a certain degree of visual quality degradation is positively correlated with the effectiveness of interventions to inhibit myopia progression. However, optical methods that cause defocus are also associated with blurred diffuse spots, and there are few reports on interventions to intervene in myopia or hyperopia progression by combining defocus signals with diffuse spots. Technical issues

[0004] The present application provides a microstructured eyeglass lens and a design method thereof, aiming to provide an eyeglass lens in which a diffuse speckle modulation signal and a defocus signal coexist and form multiple signal competition on the retina. Technical Solutions

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] In a first aspect, a microstructured spectacle lens is provided, comprising:

[0007] A mother mirror, wherein the mother mirror has a modulation area, and the mother mirror includes a first body located in the modulation area;

[0008] A microstructure comprising a first lens and a second lens; the first lens is connected to the first body, and the first lens is configured to cooperate with the first body to form a defocus; the second lens is connected to the first body, and the second lens is configured to cooperate with the first body to form a diffuse spot; the second lens is connected to the first lens and exposes a portion of the first body so that the modulation area can simultaneously generate a clear visual signal, a defocus signal and a diffuse spot modulation signal.

[0009] Optionally, the mother lens further has a clear vision area, and the mother lens includes a second body located in the clear vision area; the modulation area surrounds the clear vision area, and the second body is connected to the first body; the center of the clear vision area coincides with the optical center of the mother lens, the clear vision area is located in an area 3 mm to 6 mm from the optical center, and the modulation area is located in an area 3 mm to 35 mm from the optical center;

[0010] The area of ​​the modulation region is S1, and the orthographic projection area of ​​the microstructure in the modulation region along a direction perpendicular to the first body is S2, satisfying: 0.5≤S2 / S1≤0.8.

[0011] Optionally, the refractive power of the first lens is P1D, the refractive power of the first body is P0D, and they satisfy: 2.5≤|P1-P0|≤8.0.

[0012] Optionally, the refractive power of the second lens is P2D, the refractive power of the first body is P0D, and the following condition is satisfied: 10≤|P2-P0|≤32.

[0013] Optionally, the refractive power of the first lens is P1D, and the refractive power of the second lens is P2D, satisfying: 8≤|P2-P1|≤30.

[0014] Optionally, the sag height of the first lens is H1 μm, and the sag height of the second lens is H2 μm, satisfying: 2≤H2 / H1≤20.

[0015] Optionally, a sag height H1 μm of the first lens satisfies: 0.5≤H1≤5.

[0016] Optionally, a sag height H2 μm of the second lens satisfies: 1≤H2≤10.

[0017] Optionally, the first body and the second body are integrally formed.

[0018] Optionally, the mother lens includes a second optical surface close to the eye side and a first optical surface arranged opposite to the second optical surface; wherein the microstructure is located on the first optical surface; or, the microstructure is located on the second optical surface; or, the microstructure is located between the first optical surface and the second optical surface.

[0019] Optionally, the surface shape of the first optical surface and / or the second optical surface is selected from at least one of a spherical surface, an aspherical surface, and a free-form surface.

[0020] Optionally, the surface shape of the first lens is selected from at least one of a spherical surface, an aspheric surface, a toric surface, a cylindrical surface, and a free-form surface; and / or

[0021] Optionally, the surface shape of the second lens is selected from at least one of a spherical surface, an aspheric surface, a toric surface, a cylindrical surface, and a free-form surface.

[0022] Optionally, the diameter of the first lens and / or the second lens ranges from 0.1 mm to 2 mm.

[0023] Optionally, the first lens and / or the second lens is a circular convex lens or a circular concave lens.

[0024] Optionally, the sum of the diameters of the first lens and the second lens is less than or equal to the pupil diameter.

[0025] Optionally, the first lens and the second lens are connected in a manner that their edges are tangent or connected.

[0026] Optionally, the first lens and the second lens are alternately connected in sequence.

[0027] Optionally, the diffuse spot generated on the retina by the light passing through the second lens has a first RMS radius value, the diffuse spot generated on the retina by the light passing through the first lens has a second RMS radius value, and the first RMS radius value is greater than the second RMS radius value.

[0028] In a second aspect, the present application further provides a method for designing a microstructured spectacle lens, comprising the following steps:

[0029] A mother lens is provided, wherein the mother lens has a clear vision area and a modulation area, wherein the modulation area surrounds the clear vision area, and the mother lens includes a first body located in the modulation area; and grids arranged in an array are provided in the modulation area, wherein the grids are connected to each other.

[0030] Providing a first lens, wherein the first lens is disposed in the grid and connected to the first body, and is configured to cooperate with the first body to form defocus;

[0031] providing a second lens, the second lens being disposed in the grid and connected to the first body, and being configured to cooperate with the first body to form a diffuse spot;

[0032] The first lens and the second lens are connected, and a portion of the first body is exposed, so that the modulation area can simultaneously generate a clear visual signal, a defocused signal and a diffuse spot modulation signal.

[0033] Optionally, the grid is at least one of a regular polygon, a circle or an ellipse.

[0034] Optionally, the grid is a regular hexagon, and the first lens and / or the second lens is configured as an inscribed circle of the regular hexagon.

[0035] Optionally, the step of providing a mother lens further comprises: determining the surface parameters of the mother lens according to the prescription and the refractive index of the mother lens material, and establishing a mother lens model;

[0036] The step of providing the first lens further includes: determining the surface parameters and diameter of the first lens; determining the position of the first lens in the modulation area according to the arrangement of the grid, and forming the first lens on the surface of the mother lens model;

[0037] The step of providing a second lens further includes: determining the surface parameters and diameter of the second lens; determining the positions of all second lenses in the modulation area according to the arrangement of the grid; and forming the second lens on the surface of the mother mirror model.

[0038] Optionally, the step of determining the surface parameters of the second lens further includes:

[0039] Performing optical simulation on a mother lens model having a first lens and a second lens formed on the surface thereof to obtain the size and shape of the diffuse spot produced on the retina by the maximum off-axis field of view light of the second lens, thereby determining the RMS radius of the diffuse spot;

[0040] Keeping the diameter of the second lens unchanged, gradually changing the single-side average optical power or sagittal height of the second lens, and establishing a relationship between the single-side average optical power or sagittal height and the RMS radius of the diffuse spot through regression analysis;

[0041] According to the RMS radius value of the diffuse spot added for the lens wearer, combined with the relationship, the single-surface average optical power or sagittal height of the second lens is obtained to obtain the surface parameters of the second lens. Beneficial effects

[0042] Compared with the prior art, the eyeglasses of the present application have clear vision signals, defocus signals and diffuse speckle modulation signals in the modulation area at the same time, and the regional areas of the three stimulation signals remain roughly balanced, so that when the pupil scans the area of ​​the microstructure, it can cover the first lens, the second lens and the first body as much as possible at the same time, thereby providing the wearer with continuous and balanced multiple retinal peripheral stimulation signals, realizing a stimulation mechanism that inhibits the growth of the eye axis; the diffuse speckle modulation signal causes more blurred peripheral imaging to be formed on the retina, and the visual quality of the imaging is quantitatively reduced through diffuse speckle regulation, and the competition among the stimulation signals is used to achieve the effect of further intervening in the progression of myopia or hyperopia.

[0043] The design method of the present application, through a grid array layout, can adjust the proportion of various signals in a certain area in a convenient and evenly distributed manner, so that the stimulation area of ​​various signals received by each area within the pupil scanning range can remain roughly constant or increase a certain signal at a certain proportion. In addition, by adjusting the size of the diffuse spot of a part of the microlens imaging, the MTF, PSF and point diagram evaluation methods are used simultaneously to evaluate the imaging quality of the peripheral retinal area, and it is found that the imaging quality of the peripheral retinal area decreases in the form of an increase in the diffuse spot, and the amount of decrease is correlated with the progression of the intervention refractive error. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a front view of a microstructured eyeglass lens provided in an embodiment of the present application;

[0045] FIG2 is a partially enlarged schematic diagram of a microstructured eyeglass lens provided in an embodiment of the present application;

[0046] FIG3 is an optical system diagram of a myopic eye model provided by an embodiment of the present application;

[0047] FIG4 is a partially enlarged schematic diagram of another microstructured eyeglass lens provided in an embodiment of the present application;

[0048] FIG5 is a schematic diagram showing the positional relationship between the first lens and the first body in a YOZ optical axis cross section provided in Example 1 of the present application;

[0049] FIG6 is a positional relationship diagram of the first lens and the second lens on the Y-axis and the first lens and the second lens adjacent to each other in the horizontal direction, provided in Example 1 of the present application;

[0050] FIG7 is a projection diagram of a reference surface of a non-Y-axis first lens or a second lens provided in Example 1 of the present application on an XOZ plane;

[0051] FIG8 is a diagram showing the size and morphology of the diffuse spot of the lens-eye system corresponding to the second lens provided in Example 1 of the present application at different optical powers;

[0052] FIG9 is a scatter plot and a fitted straight line showing the average optical power of a single surface of the second lens and the RMS radius of the system diffuse spot provided in Example 1 of the present application;

[0053] FIG10 is a schematic diagram of the positional relationship between the second lens parabola and the first body in a YOZ optical axis cross section provided in Example 2 of the present application;

[0054] FIG11 is a diagram showing the size and morphology of the diffused spot of the lens-eye system corresponding to the second lens provided in Example 2 of the present application at different sag heights;

[0055] FIG12 is a scatter plot and a fitted straight line showing the sagittal height of the second lens and the RMS radius of the diffuse spot of the system, provided in Example 2 of the present application;

[0056] Figure numerals: 10 - mother mirror, 101 - first body, 102 - second body, 103 - optical center, 104 - second optical surface, 105 - first optical surface, 20 - microstructure, 201 - first lens, 202 - second lens, 100 - modulation area, 200 - clear vision area, 300 - grid.

[0057] Implementation Methods of the Application

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. The described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0059] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application.

[0060] The applicant has found that the number of myopic patients has been increasing in recent years, showing an upward trend year by year, and high myopia increases the risk of myopic patients losing their vision. Therefore, it is very important to take measures to prevent and control myopia. Currently, the recognized clinically significant optical intervention methods, whether keratoconus, multifocal soft lenses or multi-point defocus frame glasses in the form of microlens arrays, all have a decrease in the visual quality of peripheral retinal imaging. Studies have shown that multifocal peripheral defocus glasses will form defocus areas in the mid-peripheral part of the retina, resulting in decreased vision and blurred peripheral vision. The interference of blurred vision in the mid-peripheral area may cause a decrease in contrast sensitivity in some frequency areas in the early stage of wearing. As the wearing time increases, the visual interference of peripheral blurred images may gradually be adapted by the brain, and there is no significant difference from ordinary single-focus frame glasses. This confirms that a certain degree of visual quality decline is positively correlated with the effect of intervention to inhibit the progression of myopia. Previous animal experiments and clinical practice have shown that the competitive existence of clear vision signals and defocused stimulus signals in the center of the macula and the periphery of the retina is an important factor in intervening in the progression of myopia or hyperopia. In all previous experiments, all optical methods that cause defocus are also associated with blurred diffuse spots. Currently, there are many technical solutions for lenses with independent designs of peripheral defocus and diffuse spots, but there is still a lack of technical solutions that can control peripheral defocus and diffuse spots at the same time and provide methods for controlling diffuse spots.

[0061] Based on this, there is a need to provide a microstructured eyeglass lens and a design method, especially to provide an eyeglass lens and a design method in which diffuse spots and defocus signals coexist and form multiple signal competition on the retina, so as to solve the above problems.

[0062] 1 and 2 , this embodiment provides a microstructured eyeglass lens, comprising a mother lens 10 and a microstructure 20; the mother lens 10 has a modulation area 100, and the mother lens 10 includes a first body 101 located in the modulation area 100; the microstructure 20 includes a first lens 201 and a second lens 202; the first lens 201 is connected to the first body 101, and the first lens 201 is configured to cooperate with the first body 101 to form a defocus; the second lens 202 is connected to the first body 101, and the second lens 202 is configured to cooperate with the first body 101 to form a diffuse spot; the second lens 202 is connected to the first lens 201, and exposes part of the first body 101, so that the modulation area 100 can simultaneously generate a clear visual signal, a defocus signal, and a diffuse spot modulation signal.

[0063] It can be understood that the microstructure 20 of the eyeglass lens of this embodiment is arranged in a grid array form, so that the modulation area 100 has clear vision signals, defocus signals and diffuse speckle modulation signals at the same time, and the regional areas of the three stimulation signals are kept roughly balanced, so that when the pupil scans the area of ​​the microstructure, it can cover the first lens 201, the second lens 202 and the first body 101 as much as possible at the same time, thereby providing the wearer with continuous and balanced multiple retinal peripheral stimulation signals. The diffuse speckle modulation signal causes more blurred peripheral imaging to be formed on the retina, and the visual quality of the imaging is quantitatively reduced through diffuse speckle regulation, and the competition between the stimulation signals is used to achieve the effect of further intervening in the progression of myopia or hyperopia.

[0064] The first body 101 of the mother lens 10 is used to correct the wearer's refractive error. The first lens 201 and the second lens 202 each provide the wearer with a variety of non-sharp corrective stimulation signals to the retinal periphery within the pupil's scanning range, providing a more diverse stimulation mechanism for intervening in the progression of refractive error. The first lens 201 on the microstructure 20 converges or diverges light, causing the image of the retinal periphery to fall in front of or behind the retina, resulting in peripheral defocus, thereby intervening in the progression of refractive error. The second lens 202 on the microstructure 20 causes light to form a larger diffuse spot on the retina. The size of this diffuse spot is correlated with the effect of intervening in the progression of refractive error. By varying the microlens structural parameters of the second lens 202, the size of the diffuse spot can be effectively controlled, adjusting the intensity of the blurred state signal stimulation.

[0065] Furthermore, the first lens 201 cooperates with the first body 101 to form a defocus, meaning that the interaction between them causes the focal point of the light to deviate from the ideal focal position. In a specific position or state, the focus of the eyeglass lens is deliberately deviated to produce a specific visual effect. The setting of the first lens 201 can change the refraction path of the light, thereby changing the focal position, which can be used to blur or adjust the focus of the eyeglass lens to adapt to different visual needs. The second lens 202 cooperates with the first body 101 to form a larger diffuse spot, which reduces the visual quality by blurring the image to create a specific optical effect.

[0066] In some embodiments, referring to FIG1 , the mother lens 10 further has a clear vision area 200, and the mother lens 10 includes a second body 102 located in the clear vision area 200; the modulation area 100 surrounds the clear vision area 200, and the second body 102 is connected to the first body 101; the center of the clear vision area 200 coincides with the optical center 103 of the mother lens 10, the clear vision area 200 is located in an area 3-6 mm from the optical center, and the modulation area 100 is located in an area 3-35 mm from the optical center; wherein, the area of ​​the modulation area 100 is S1, and the orthographic projection area of ​​the microstructure 20 in the modulation area 100 along the direction perpendicular to the first body 101 is S2, satisfying: 0.5≤S2 / S1≤0.8.

[0067] It can be understood that when the range of 0.5 ≤ S2 / S1 ≤ 0.8 is satisfied, the microstructures 20 have a higher fill ratio within the modulation area 100. The presence of the microstructures 20 alters the propagation path and refractive properties of light, thereby achieving a balanced distribution of the various stimulus signals. Furthermore, the sufficient area ratio and the balanced distribution of the three stimulus signals allow more of the non-clear visual stimulus signals to be perceived by the retinal periphery, while also ensuring that the degradation of visual quality is within a reasonable range and limiting the risk of discomfort when wearing the glasses.

[0068] Furthermore, when the clear vision zone 200 is located within a region of 3 mm to 6 mm from the optical center, this range is set to ensure that when the human eye is looking straight ahead or scanning, the light beam in the peripheral field of view of the retina can pass through the microstructure 20 region, so that the human eye can receive the stimulation of a non-clear correction signal to intervene in the development of myopia and hyperopia.

[0069] In some embodiments, the refractive power of the first lens 201 is P1D, the refractive power of the second lens 202 is P2D, and the refractive power of the first body 101 is P0D, satisfying the following: 2.5 ≤ |P1-P0| ≤ 8.0. For example, the value of |P1-P0| can be at least one of 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, and 8.0, or a range between at least two of these values. When the range of 2.5 ≤ |P1-P0| ≤ 8.0 is satisfied, it facilitates the first lens 201 and the mother lens 10 to form a defocused image. The lower limit ensures that light passing through the first lens 201 is not affected by peripheral defocus of the naked eye retina and is always imaged in front of or behind the retina, thereby forming true myopic or hyperopic defocus. The upper limit avoids deep defocus that would otherwise destroy the peripheral defocus effect.

[0070] In some embodiments, the second lens 202 further satisfies the following: 10 ≤ |P2-P0| ≤ 32. For example, the value of |P2-P0| can be at least one of 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, or 32, or a range between at least two of these values. When the range of 10 ≤ |P2-P0| ≤ 32 is satisfied, the second lens 202 facilitates cooperation with the parent lens to form a diffuse spot. The upper limit can avoid excessively large diffuse spots that can make adaptation difficult for the wearer, while the lower limit can ensure a sufficiently strong diffuse spot stimulation signal.

[0071] In some embodiments, the first lens 201 and the second lens 202 further satisfy the following: 8 ≤ |P2 - P1| ≤ 30. For example, the value of |P2 - P1| can be at least one of 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, or 30, or a range between at least two of these values. When the range of 8 ≤ |P2 - P1| ≤ 30 is satisfied, the first lens 201 and the second lens 202 can simultaneously provide two stimulation signals, peripheral defocus and blurry speckle, while maintaining the aesthetics of the lens. The upper limit prevents the second lens 202 from being visually noticeably different from the first lens 201 in appearance, while the lower limit ensures that the two lenses are effectively functionally separated, thereby generating two different stimulation signals.

[0072] In some embodiments, the sag height of the first lens 201 is H1 μm, and the sag height of the second lens 202 is H2 μm, satisfying the following: 2 ≤ H2 / H1 ≤ 20; 0.5 ≤ H1 ≤ 5; and 1 ≤ H2 ≤ 10. For example, the value of H2 / H1 can be at least one of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20, or a range between at least two of these values. It will be understood that sag height refers to the height of the vertex of a lens surface relative to the surface of a parent lens. Sag height can be used to indirectly describe the shape and curvature of a lens, as well as its ability to focus light. When the above range is met, it can be ensured that the diffuse spot formed by the second lens 202 in cooperation with the mother lens is significantly larger than the diffuse spot formed by the first lens 201 in cooperation with the mother lens, so that the second lens 202 in cooperation with the mother lens mainly provides a blurred diffuse spot stimulation signal, while the first lens 201 in cooperation with the mother lens mainly provides a peripheral defocus stimulation signal, and the upper limit values ​​of the vector heights of the two microlenses ensure that the two microlenses are basically invisible visually.

[0073] The sag height of the second lens 202 does not exceed 10 μm, which can make the microlens essentially invisible visually and maintain the beauty of the lens.

[0074] In some embodiments, the first body 101 and the second body 102 are integrally formed.

[0075] In some embodiments, referring to FIG3 , the mother lens 10 includes a second optical surface 104 close to the eye side and a first optical surface 105 disposed opposite to the second optical surface 104 ; wherein the microstructure 20 is located on the first optical surface 105 , or the microstructure 20 is located on the second optical surface 104 , or the microstructure 20 is located between the first optical surface 105 and the second optical surface 104 .

[0076] In some embodiments, the surface shape of the first optical surface 105 and / or the second optical surface 104 is selected from at least one of a spherical surface, an aspherical surface, and a free-form surface, and includes the function of providing aberration correction or precise compensation for peripheral hyperopia defocus.

[0077] In some embodiments, the surface shape of the first lens 201 is selected from at least one of a spherical surface, an aspheric surface, a toric surface, a cylindrical surface, and a free-form surface.

[0078] In some embodiments, the surface shape of the second lens 202 is selected from at least one of a spherical surface, an aspheric surface, a toric surface, a cylindrical surface, and a free-form surface.

[0079] In some embodiments, the diameter of the first lens 201 and / or the second lens 202 ranges from 0.1 mm to 2 mm; for example, the diameter can be any one of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2.0 mm, or a range between any two of the values. It is understandable that the diameters of the first lens 201 and the second lens 202 can be selected to be equal, firstly to facilitate the uniform distribution of the microstructure so that the areas generating various stimulation signals remain roughly balanced; secondly to ensure that when the human eye is looking straight ahead or scanning, the full-aperture light beam of the peripheral field of view of the retina can completely cover the first body 101 on the microstructure, ensuring that the human eye has more clear vision signal stimulation, making it easier for the wearer to adapt, and the full-aperture light beam of the peripheral field of view of the retina can basically or completely cover a first lens 201 and an adjacent second lens 202, ensuring that the human eye can obtain stimulation of two non-clear correction signals to intervene in the development of myopia and hyperopia.

[0080] In some embodiments, the first lens 201 and the second lens 202 are circular convex lenses or circular concave lenses.

[0081] In some embodiments, when the first lens 201 and the second lens 202 are circular convex lenses or circular concave lenses and are disposed on the first optical surface 105, the first lens 201 and the second lens 202 are more convex or more concave relative to the first optical surface 105; when the first lens 201 and the second lens 202 are circular convex lenses or circular concave lenses and are disposed on the second optical surface 104, the first lens 201 and the second lens 202 are more convex or more concave relative to the first optical surface 105.

[0082] In some embodiments, the sum of the diameters of the first lens 201 and the second lens 202 is less than or equal to the pupil diameter; wherein the pupil diameter of the human eye generally ranges from 3 mm to 6 mm.

[0083] In some embodiments, the first lens 201 and the second lens 202 are connected in a tangential manner.

[0084] In some embodiments, the first lens 201 and the second lens 202 are alternately connected, as shown in Figure 2 . In other embodiments, the first lens 201 and the second lens 202 may be spaced apart, as shown in Figure 4 . When the first lens 201 and the second lens 202 are alternately connected, the three generated stimulus signals can be evenly distributed, allowing more of the unclear visual stimulus signals to be perceived by the retinal periphery, ensuring that the degradation of visual quality is within a reasonable range.

[0085] In some embodiments, the vertex normal of the first lens 201 or the second lens 202 is oriented toward the center of curvature of the mother lens surface, which can ensure that the light passing through the microlens is coaxial with the light of the first body 101 .

[0086] In some embodiments, the diffuse spot produced on the retina by light passing through the second lens 202 has a first RMS radius value, and the diffuse spot produced on the retina by light passing through the first lens 201 has a second RMS radius value, with the first RMS radius value being greater than the second RMS radius value. When the above relationship is satisfied, two unsharp stimulation signals can be generated: the diffuse spot formed by the second lens 202 in combination with the parent lens is significantly larger than the diffuse spot formed by the first lens 201 in combination with the parent lens. The larger diffuse spot is a blurred diffuse spot stimulation signal, while the smaller diffuse spot is a peripheral defocus stimulation signal. The two unsharp signals coexist, intervening in different ways to intervene in the progression of refractive error.

[0087] In some embodiments, using Figures 1 and 2 as an example, the microstructure 20 is formed by dividing the modulation area 100 into a regular hexagonal grid, with a first lens 201 and a second lens 202 arranged in the form of an inscribed circle within the regular hexagonal grid. The first lens 201 and the second lens 202 are interconnected and each has a peripheral defocus or diffuse speckle modulation function. The second lens 202 is closely arranged with the adjacent first lens 201 and has a tangent boundary. Therefore, the eyeglass lens simultaneously provides three optical stimulation signals: clear vision, peripheral defocus, and blurred diffuse speckle, through this surface microstructure, and ensures that each signal is adjacent to and connected to at least two other different signal units, thereby providing the wearer with a continuous and balanced variety of peripheral retinal stimulation signals.

[0088] In some embodiments, this embodiment further provides a method for designing a microstructured eyeglass lens, comprising the following steps:

[0089] A mother lens 10 is provided. The mother lens 10 has a clear vision area 200 and a modulation area 100. The modulation area 100 surrounds the clear vision area 200. The mother lens 10 includes a first body 101 located in the modulation area 100. An array of grids 300 is provided in the modulation area 100. The grids 300 are connected to each other.

[0090] A first lens 201 is provided. The first lens 201 is disposed in the grid 300 and connected to the first body 101, and is configured to cooperate with the first body 101 to form defocusing.

[0091] A second lens 202 is provided. The second lens 202 is disposed in the grid 300 and connected to the first body 101 , and is configured to cooperate with the first body 101 to form a diffuse spot.

[0092] The first lens 201 and the second lens 202 are connected, and a portion of the first body 101 is exposed, so that the modulation area 100 can simultaneously generate a clear visual signal, a defocused signal, and a diffuse speckle modulation signal.

[0093] It can be understood that the design method of the present application can adjust the proportion of various signals in a certain area in a convenient and evenly distributed manner through a grid array layout, so that within the pupil scanning range, the stimulation area of ​​various signals received by each area remains roughly constant or a certain signal is increased at a certain proportion. The microstructure formed can enable the frame glasses to perfectly simulate a similar state. Once the difference in the size of the diffuse spots of two different microstructures reaches a certain proportion, the effect of always having the light signals passing through different microstructures in a competitive state on the retina can be achieved.

[0094] In some embodiments, the grid 300 is at least one of a regular polygon, a circle, or an ellipse.

[0095] In some embodiments, further preferably, the grid 300 is a regular hexagon, and the first lens 201 and the second lens 202 are configured as inscribed circles of the regular hexagon.

[0096] In some embodiments, the step of providing the mother lens 10 further includes: determining the surface parameters of the mother lens 10 according to the prescription and the refractive index of the mother lens material, and establishing a mother lens model;

[0097] The step of providing the first lens 201 further includes: determining the surface parameters and diameter of the first lens 201; determining the position of the first lens 201 in the modulation area 100 according to the arrangement of the grid 300, and forming the first lens 201 on the surface of the mother lens model;

[0098] The step of providing the second lens 202 further includes: determining the surface parameters and diameter of the second lens 202; determining the position of the second lens 202 in the modulation area 100 according to the arrangement of the grid 300; and forming the second lens 202 on the surface of the mother lens model.

[0099] In some embodiments, the step of determining the surface parameters of the second lens 202 further includes:

[0100] Performing optical simulation on a mother lens model having the first lens 201 and the second lens 202 formed on the surface thereof to obtain the size and shape of the diffuse spot produced on the retina by the maximum off-axis field of view light of the second lens 202, thereby determining the RMS radius of the diffuse spot;

[0101] Keeping the diameter of the second lens 202 unchanged, gradually changing the single-side average optical power or sagittal height of the second lens 202, and establishing a relationship between the single-side average optical power or sagittal height and the RMS radius of the diffuse spot through regression analysis;

[0102] According to the RMS radius of the diffuse spot added for the lens wearer, combined with the relationship, the single-surface average optical power or sagittal height of the second lens 202 is obtained to obtain the surface parameters of the second lens.

[0103] In some embodiments, the second lens 202 for blurred diffuse spots is signal modulated by the following design method: after setting the pupil diameter, lens-to-eye distance, and axial length of the microlens equipped with the retinal image plane diffuse spot modulation function, a point diagram evaluation method is used to confirm the size and shape of the diffuse spot formed on the retina. By changing the microlens structural parameters and using regression analysis, an empirical formula for the single-surface average optical power or sag of the second lens and the RMS radius of the diffuse spot is established for different microlens surface shapes, including spherical, aspherical, and free-form surfaces.

[0104] In some embodiments, this embodiment provides a method for designing a microstructured eyeglass lens, comprising the following steps:

[0105] S1. Calculate the surface parameters of the first optical surface 105 and the second optical surface 104 of the master lens based on the wearer's prescription and the refractive index of the selected lens material. Then, determine the positional relationship between the first optical surface 105 and the second optical surface 104 based on the selected lens diameter and center thickness. Insert the determined lens into the ideal eye model. Then, optimize the eye model corresponding to the myopia type using the vitreous thickness of the ideal eye model as a variable.

[0106] S2. Calculate the surface shape, radial position, and spherical center coordinates of the first lens 201 in the microstructure 20 based on the need for peripheral defocus. First, determine the diameter D1 of the second body 102 in the clear vision zone 200. Then, select the surface shape of the first lens 201. The surface shape parameters of the first lens 201 are calculated based on the absolute value of the difference between the single-sided average optical power of the first lens 201 and the average optical power of the first body 101, which is 2.5-8 diopters. The size of D2 is selected based on the range of 0.8mm to 2mm for the radial diameter D2 of the first lens 201. Finally, calculate the structural parameters of the regular hexagonal grid 300: specifically, based on the selected diameter D1, Using the radial diameter D2 of the first lens 201 and the radial diameter of the second lens 202 being the same as that of the first lens 201 as constraints, and combining the geometric relationship of the regular hexagonal microstructure array, the radial distance h from the center of the first lens 201 at each location on the lens to the lens optical axis is determined. Furthermore, combining the curvature radius r1 of the microlens and the constraint that the vertex normal of the first lens 201 is aligned with the center of curvature of the surface of the first body 101 at that location, the position of the reference point (such as a spherical center or focal point, etc.) of each location on the first lens 201 is determined.

[0107] S3. Performing a three-dimensional model based on the calculation results of step S2, adding a first lens 201 composed of a microlens array in the shape of a regular hexagonal inscribed circle to the front surface of the lens model; inserting the model into a myopic eye model, and verifying the peripheral defocusing function of off-axis light passing through the first lens 201 in front of the retina through optical simulation;

[0108] S4. Calculate the structural parameters of the second lens 202 based on the need for speckle control. Determine the surface shape, initial single-sided average optical power or sagittal height, and radial diameter D3 of the second lens 202. Based on the radial diameter of the second lens 202 and the arrangement of the second lens 202, calculate the radial distance h1 from the center of each second lens 202 to the optical axis of the first body 101. Then, based on the surface shape parameters of the second lens 202 and the orientation of the vertex normal of the second lens 202 toward the center of curvature of the surface of the first body 101 at that location, determine the position of the reference point (e.g., a spherical center or focal point, etc.) of each second lens 202.

[0109] S5. Based on the calculation results of step S4, a second lens 202 composed of a microlens array in the shape of a regular hexagonal inscribed circle is added to the lens model of step S3 through three-dimensional modeling. This model is inserted into a myopic eye model, and the size and shape of the diffuse spot produced on the retina by the maximum off-axis field of view light passing through second lens 202 are recorded through optical simulation.

[0110] S6. While maintaining the radial diameter D3 of the second lens 202 constant, gradually change the average optical power or sagittal height of the second lens 202 on a single surface. Repeat steps S4 and S5. Through modeling and optical simulation, record the changes in the size and morphology of the diffuse spot on the retina at the maximum off-axis field of view as the average optical power or sagittal height of the second lens 202 on a single surface changes. Establish an empirical formula for the relationship between the average optical power or sagittal height of the second lens 202 on a single surface (independent variable x) and the RMS radius of the diffuse spot (dependent variable y) through linear fitting: y = f(x).

[0111] S7. Based on the RMS radius of the diffuse spot added for the wearer, the empirical formula in step S6 is used to calculate the single-surface average focal power or sagittal height of the second lens 202, thereby obtaining the structural parameters of the second lens 202.

[0112] In some embodiments, in step S2 , the radial diameter of the second lens 202 is the same as the radial diameter of the first lens 201 , and the sum of the diameters of any first lens 201 and its adjacent second lens 202 does not exceed the pupil diameter.

[0113] In some embodiments, in step S4 , a spherical surface is used as the initial surface shape of the regular hexagonal inscribed circular microlenses of the first lens 201 and the second lens 202 .

[0114] In some embodiments, spectacle lenses can be cast or injection molded from a metal mold, or cast from a glass mold to produce a desired prescription power or semi-finished product. The semi-finished product can then be machined in a laboratory to obtain the desired prescription power. In some embodiments, spectacle lenses can also be produced from metal or glass molds using a UV curing process to produce the desired prescription power or semi-finished product. The semi-finished product can then be machined in a laboratory to produce the desired spectacle lens or spectacle lens blank. Alternatively, spectacle lenses or spectacle lens blanks can be produced through a bonding process.

[0115] In some embodiments, the mother mirror is made of a polymer material or an inorganic non-metallic material. The polymer material includes a thermoplastic resin or a thermosetting resin, and the inorganic non-metallic material includes glass. Thermoplastic resins include polycarbonate or polymethyl methacrylate; thermosetting resins include acrylic resins, episulfide resins, thiourethane resins, allyl resins, and polyurethanes.

[0116] In some embodiments, a coating is formed on at least one side of the mother lens. The coating may include a transparent coating to increase the transmittance of the lens, a hard coating to increase the durability of the lens, a reflective film to block harmful light, an anti-reflection and anti-reflection coating to improve image visibility, a polarizing film with a color-changing function, or other color-changing films doped with ultraviolet-sensitive materials. The coating itself may have different colors, and the visual color under reflective conditions may be green, blue, yellow, purple, etc., or other colors may be used.

[0117] In some embodiments, the eyeglass lens is directly prepared by a mold, and the mold may include an upper mold base and a lower mold base. The working surface of the upper mold base is a concave surface, which is used to shape the first optical surface and the second optical surface respectively.

[0118] In some embodiments, the spectacle lenses obtained by the above process can be combined with spectacle frames to further produce spectacles. The spectacle lenses can be shaped like round, square, elliptical, or other special shapes. It should be noted that the shape of the spectacle lenses can be roughly the above shapes and is not limited to a perfect geometric shape.

[0119] In order to enable those skilled in the art to clearly understand the above-mentioned implementation details and operations of the present application, and to significantly demonstrate the improved performance of the microstructured eyeglass lenses and design methods of the embodiments of the present application, the above-mentioned technical solutions are illustrated by means of multiple embodiments below.

[0120] Example 1

[0121] Assuming that the wearer's prescription is S-3.00D, the lens diameter is set to 60 mm, the material refractive index is 1.56, the center thickness of the lens is 1.3 mm, the shape is a meniscus lens, the front surface corresponds to the first optical surface, and the back surface corresponds to the second optical surface; a design method for a microstructured spectacle lens is provided, comprising the following steps:

[0122] St11: Based on the wearer's prescription of -3D, the average optical focal length of the front surface of the lens is set to 2 diopters (abbreviated as D), and the average optical focal length of the vertex of the back surface is -5 diopters; then combined with the refractive index of the lens material, the spherical radii R1 and R2 of the lens mother mirror 10 are calculated. The obtained structural data of the mother mirror 10 are shown in Table 1.

[0123] Table 1

[0124] St12: Select the Liou ideal eye model, insert the lens into the ideal eye model, set the distance between the lens and the front surface of the cornea to 12 mm, the ideal eye pupil diameter to 5 mm, the system wavelength to 0.55 μm, and the full field of view to ±14°; use the vitreous thickness of the ideal eye model as a variable to optimize the corresponding myopia form of the lens eye model, and its optical system is shown in Figure 3.

[0125] St21: With the constraint that the first lens 201 and the second lens 202 are not set within a range of at least 6 mm in diameter in the central area of ​​the front surface of the lens, and the diameter of the central area of ​​the front surface is between 6-12 mm, the diameter D1 of the second body 102 in the clear vision zone 200 is determined to be 9.8 mm.

[0126] St22: Determine that first lens 201 is a convex lens with a spherical surface. Select 3D from the absolute value of the difference between the average optical power of the single surface of first lens 201 and the average optical power of the front surface, ranging from 2.5 to 8 diopters. The average optical power of the single surface of first lens 201 is 5D. Based on this, calculate the radius of curvature r1 of first lens 201. The pupil diameter of the human eye generally ranges from 3 mm to 6 mm. To ensure that the full-aperture beam in the peripheral field of view of the retina substantially or completely covers the first lens 201 and the adjacent second lens 202, the radial diameter D2 of the convex lens is selected to be 1.2 mm. The optical structural data of first lens 201 are shown in Table 2.

[0127] Table 2

[0128] St23: Calculate the structural parameters of a regular hexagonal microstructure array consisting of alternating first and second lenses outside the central area of ​​the front surface. A schematic diagram of the positional relationship between the first lens 201 and the exposed first body 101 within the YOZ optical axis cross section is shown in Figure 5, where the Z axis is the optical axis. To facilitate marking the center of the first lens, a full circle with radius r1 is drawn in the figure. In actual lenses, only the portion of the convex lens protruding from the first body 101 exists. Because the radial diameters of the first lens 201 and the second lens 202 are the same, and the radial diameter of the first body 101 exposed at the center of the microstructure is also the same, the center-to-center distance between any first lens 201 and its radially adjacent second lens 202 is approximately 3.6 mm. Therefore, based on the selected diameter D1 and the radial diameter D2 of the first lens 201, the radial distance h from the center of the first lens 201 to the optical axis within the YOZ cross section can be first determined (h is the perpendicular distance from the intersection of the normal line of the convex lens vertex and the spherical surface of the first body 101 to the optical axis). Based on the radial distance h from the center of the first lens 201 to the optical axis and the curvature radius r1 of the microlens, and the constraint that the direction of the normal to the vertex of the first lens 201 should be toward the center of curvature of the surface of the first body 101 at that location, the center position (z, y) of each first lens 201 on the YOZ cross section can be calculated. The above calculated data is shown in Table 3.

[0129] Table 3

[0130] Based on the arrangement of the regular hexagonal microlens array, the positional relationship between the first lens 201 (number 1) and the first lens 201 closest to the horizontal axis on the YOZ optical axis cross section in Table 3 can be determined. The distance m from the center of the closest first lens 201 to the Y axis is calculated (the center of the first lens 201 is defined as the intersection of the vertex normal of the microlens and the spherical surface of the first body 101), as shown in FIG6 . Based on modeling requirements, a reference plane is constructed through the vertex normal of the microlens and perpendicular to the XOZ plane, and projected onto the XOZ plane, as shown in FIG7 . In the figure, the distance from the first lens 201 to the Z axis is set to n. Based on the spherical radius R1 of the exposed first body 101 and m, the angle θ between the reference plane and the Z axis can be calculated using the following formula:

[0131] Using this reference plane to establish a new coordinate system, a positional relationship between the first lens 201 and the exposed first body can be plotted, similar to that shown in Figure 5 . The spherical center position (z, y) of the first lens 201 on this reference plane, obtained based on this positional relationship, is identical to the spherical center coordinate data for the first lens 201 with the same radial distance h, as determined in Table 3. Repeating the above process, the angle θ between the reference plane and the X-axis can be calculated for all first lenses 201 with the same radial distance h. Using the above method, the reference plane angle θ for all first lenses 201 with other radial distances numbered 2-6 in Table 3 can be calculated sequentially. Similarly, the reference plane angle θ and the spherical center position on the reference plane for first lenses 201 with other radial distances not listed in Table 3 can also be calculated using the above method.

[0132] St3: Perform three-dimensional modeling based on the calculation results of steps St21-St23, and add a first lens composed of a microlens array in the shape of a regular hexagonal inscribed circle on the front surface of the exposed first body of the lens model.

[0133] St4: According to the need for diffuse spot control, calculate the structural parameters of the second lens 202 in the microstructure. Select a spherical surface as the surface shape of the regular hexagonal inscribed circular microlens of the second lens 202; in order to obtain a larger diffuse spot, determine the initial single-sided average optical focal length of the second lens 202 to be 15D, and the radial straightness of the second lens 202 is the same as that of the first lens 201, which is 1.2mm. The radial distance from the center of the second lens 202 at each location to the optical axis of the exposed first body 101 is solved based on the radial diameter and arrangement of the second lens 202. Combined with the curvature radius of the second lens 202 and the vertex normal of the second lens 202 facing the curvature center of the surface of the first body 101 at that location, determine the spherical center position of each second lens 202 on the reference plane. The solution method is the same as that used for the first lens 201.

[0134] St5: Based on the calculation results of step St4, a second lens 202 composed of a microlens array in the shape of a regular hexagonal inscribed circle is added to the lens model of step St3 through three-dimensional modeling. The constructed model is reinserted into the myopic eye model, and the size and shape of the diffuse spot produced on the retina by the maximum off-axis field of view light passing through the second lens 202 is recorded through optical simulation.

[0135] St6: While maintaining the radial diameter of the second lens 202 unchanged, increase the single-sided average optical power of the second lens 202 at equal optical power intervals of 4D, and with the constraint that the sagittal height of the second lens 202 does not exceed 10 μm, repeat steps St4 and St5. Through modeling and optical simulation, record the size and morphology of the diffuse spot on the retina at the maximum off-axis field of view as the single-sided optical power of the second lens increases. The RMS data of the diffuse spot radius are shown in Table 4, and the diffuse spot morphology is shown in Figure 8.

[0136] Table 4

[0137] From all five results, a scatter plot of the average optical power of the second lens 202 on a single surface and the RMS radius of the diffuse spot of the lens-eye system can be obtained, as shown in FIG9 . An empirical formula for the average optical power of the second lens 202 on a single surface (independent variable x) and the RMS radius of the diffuse spot (dependent variable y) is established through linear fitting. The empirical formula is as follows:

[0138] y=0.8476x+12.005;

[0139] From this empirical formula, it can be seen that the surface parameters of the second lens 202 will affect the size of the diffuse spot on the retina. When the single-sided average optical power of the second lens 202 is larger, the RMS radius of the generated diffuse spot is larger, and the two show a linear positive correlation.

[0140] Step 7: Based on the RMS radius of the diffuse spot added for the wearer, the empirical formula in step St6 is used to solve the single-surface average optical power of the second lens 202, thereby obtaining the final surface parameters of the second lens 202.

[0141] To compare the degree of diffuse speckle produced by the second lens 202 compared to the first lens 201, the second lens 202 was replaced with the structural parameters of the first lens 201, and remodeling and optical simulation were performed. The RMS radius of the diffuse speckle produced on the retina at maximum field of view was obtained, as shown in Table 5 for the corresponding values ​​of 5D optical power. The RMS radius of the diffuse speckle produced by the second lens 202 at maximum field of view was compared with the RMS radius of the diffuse speckle in Table 4 to calculate the rate of increase. Table 5 shows that when the optical power of the first lens 201 is used to construct the second lens 202, the diffuse speckle is relatively small due to its smaller optical power. When the optical power of the second lens 202 is increased from 15D to 31D, the RMS value of the diffuse speckle radius increases by 21% to 86.3% compared to the result of the second lens 202 constructed with 5D optical power. Therefore, to significantly increase the diffuse speckle size, the structural parameters of the second lens 202 need to be redesigned.

[0142] Table 5

[0143] Example 2

[0144] Assuming that the wearer's prescription is S-3.00D, the lens diameter D is set to 60 mm, the material refractive index is 1.56, the lens center thickness is 1.3 mm, and the shape is a meniscus lens; the front surface corresponds to the first optical surface, and the back surface corresponds to the second optical surface; a design method for a microstructured spectacle lens is provided, comprising the following steps:

[0145] St11, St12, St21-23 and St3 are exactly the same as those in Example 1.

[0146] St4: Calculate the structural parameters of the second lens 202 in the microstructure according to the need for diffuse spot control. Select an aspheric surface as the surface shape of the regular hexagonal inscribed circular microlens of the second lens 202; to obtain a larger diffuse spot, select an appropriate initial sagittal height of the second lens 202; and the radial diameter of the second lens 202 is the same as that of the first lens 201; use the radial diameter and arrangement of the second lens 202 to solve the radial distance from the center of the second lens 202 at each location to the optical axis of the exposed first body 101, and then combine the sagittal height of the second lens 202 and the direction of the normal line of the vertex of the second lens 202 toward the center of the surface curvature of the first body 101 at that location, and the vertex (z1, y1) and focal position (z2, y2) of the parabolic microlens of the second lens 202 on each reference plane can be calculated; the specific process is as follows:

[0147] St41: The initial sag height of the second lens 202 is selected to be 5 microns, the surface shape of the aspheric microlens is selected to be a parabola, and the radial diameter of the second lens 202 is the same as that of the first lens 201. The optical structure data of the second lens 202 is shown in Table 6.

[0148] Table 6

[0149] St42: Based on the radial diameter and arrangement of the second lenses 202, calculate the radial distance h1 (h1 is the perpendicular distance from the intersection of the parabolic microlens vertex normal and the spherical surface of the first body 101 to the optical axis) from the center of each second lens 202 to the exposed first body 101, and the microlens reference point. First, calculate the radial distance h1 and the reference point from the center of the second lens 202 to the exposed first body 101 on the YOZ optical axis cross section. Because the radial diameters of the first lens 201 and the second lens 202 are identical, as is the radial diameter of the exposed first body 101, the center distance between the center of the second lens 202 and its radially adjacent first lens 201 on the YOZ optical axis cross section is approximately 1.2 mm, and the center distance between the center of the second lens 202 and its radially adjacent second lens 202 is approximately 3.6 mm. This provides the radial distance h1 from the center of the second lens 202 to the optical axis of the exposed first body 101 on the YOZ optical axis cross section. The vertex (z1, y1) and parabolic focus position (z2, y2) of each parabolic microlens of the second lens 202 on the YOZ optical axis cross section are then calculated based on the sagittal height of the second lens 202 and the direction of the vertex normal of the second lens 202 toward the center of curvature of the surface of the first body 101 at that location. The positional relationship between the parabolic microlenses of the second lens 202 and the first body 101 on the YOZ optical axis cross section is shown in Figure 10. The vertex and focus coordinates of the parabolic microlenses of the second lens 202 on the YOZ plane obtained above are shown in Table 7.

[0150] Table 7

[0151] The method for calculating the angle θ between the reference plane (the reference plane passes through the normal line at the parabola's vertex and is perpendicular to the XOZ plane) and the YZ plane for the parabolic microlenses of the second lens 202 at locations other than the Y axis is the same as the method for calculating the angle θ for the first lens 201 at locations other than the Y axis. Using this method, the vertex (z1, y1) and focal position (z2, y2) of the parabolic microlenses of the second lens 202 at locations other than the Y axis on the reference plane can be obtained.

[0152] St5: Perform three-dimensional modeling based on the calculation results of step St4, add a second lens 202 composed of a microlens array in the shape of a regular hexagonal inscribed circle to the lens model of step St3, reinsert the built model into the myopic eye model, and record the size and shape of the diffuse spot on the retina produced by the maximum off-axis field of view light passing through the second lens 202 through optical simulation.

[0153] St6: Keeping the radial diameter of the second lens 202 unchanged and with the constraint that the sagittal height of the second lens 202 does not exceed 10 μm, increase the sagittal height of the microlenses of the second lens 202 to 10 μm at equal sagittal height intervals of 1.25 μm. Repeat steps St4 and St5. Through modeling and optical simulation, record the size and morphology of the diffuse spot on the retina at the maximum off-axis field of view as the single-sided optical power of the second lens 202 increases. The RMS data of the diffuse spot radius are shown in Table 8, and the diffuse spot morphology is shown in Figure 11.

[0154] Table 8

[0155] From all five results, a scatter plot of the sagittal height of the second lens 202 and the RMS radius of the diffuse spot can be obtained, as shown in FIG12 . An empirical formula for the sagittal height of the second lens 202 (independent variable x) and the RMS radius of the diffuse spot of the lens-eye system (dependent variable y) is established through linear fitting. The empirical formula is as follows:

[0156] y=2.7636x+12.755;

[0157] From this empirical formula, it can be seen that the surface parameters of the second lens 202 will affect the size of the diffuse spot on the retina. When the sagittal height of the microlens of the second lens 202 is larger, the RMS radius of the generated diffuse spot is larger, and the two show a linear positive correlation.

[0158] Step 7: Based on the RMS radius of the diffuse spot added for the wearer, the sag of the second lens 202 is solved according to the empirical formula of step S6, thereby obtaining the final surface parameters of the second lens 202.

[0159] To compare the degree of diffuse speckle produced by the second lens 202 compared to the first lens 201, the structural parameters of the first lens 201 were replaced with the second lens 202, and the sag height of the microlens was calculated. The RMS radius of the diffuse speckle produced on the retina at the maximum field of view of the lens-eye system is shown in Table 5 corresponding to a sag height of 1.61. The RMS radius of the diffuse speckle in Table 8 was then compared with this value to calculate the rate of increase. Table 9 shows that increasing the focal power of the first lens 201 from 5μm to 10μm increases the RMS radius of the diffuse speckle by 29.6% to 96.2% compared to the result of the second lens 202 constructed with a focal power of 1.61μm. Therefore, to significantly increase the diffuse speckle size, the structural parameters of the second lens 202 need to be redesigned.

[0160] Table 9

[0161] In Examples 1 and 2, the second lens 202 was designed using a spherical surface and a parabolic surface, respectively. To compare the diffuse spot radius of the spherical and parabolic surfaces at the same sagittal height, the data in Table 5 of Example 1 was interpolated to obtain the diffuse spot radius corresponding to the sagittal height in Table 8. The results were then compared with those in Table 9, as shown in Table 10. As can be seen from Table 10, the use of a parabolic surface with the same sagittal height as the spherical surface further increases the diffuse spot radius of the lens-eye system, indicating that the use of an aspheric surface helps increase the intensity of the diffuse spot modulation signal.

[0162] Table 10

[0163] It should be noted that the spectacle lens structure of this embodiment, while retaining the traditional retinal peripheral defocus stimulation signal, introduces a diffuse speckle modulation signal. Through a modulation scheme that links the microlens array structural parameters with the RMS radius of the diffuse speckle, this introduced diffuse speckle modulation signal is linked to the facial shape parameters, thereby precisely setting the diffuse speckle modulation signal in the retinal periphery to achieve the goal of controlling myopia progression. Through the staggered arrangement of the first and second lenses, this lens ensures that when the pupil scans the microstructure area, it covers the modulation area as much as possible. The coexistence of multiple stimulation signals within the scanning range provides a more diverse stimulation mechanism for inhibiting axial length growth.

[0164] The above is a detailed introduction to a microstructured eyeglass lens and a design method thereof provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A microstructured eyeglass lens, wherein: include: A mother mirror (10), the mother mirror (10) having a modulation area (100), the mother mirror (10) comprising a first body (101) located in the modulation area (100); A microstructure (20), the microstructure (20) comprising a first lens (201) and a second lens (202); the first lens (201) is connected to the first body (101), and the first lens (201) is configured to cooperate with the first body (101) to form a defocused image; the second lens (202) is connected to the first body (101), and the second lens (202) is configured to cooperate with the first body (101) to form a diffuse spot; the second lens (202) is connected to the first lens (201) and exposes a portion of the first body (101), so that the modulation area (100) can simultaneously generate a clear visual signal, a defocused signal, and a diffuse spot modulation signal.

2. The microstructured eyeglass lens according to claim 1, wherein: The mother lens (10) further has a clear vision area (200), and the mother lens (10) includes a second body (102) located in the clear vision area (200); the modulation area (100) surrounds the clear vision area (200), and the second body (102) is connected to the first body (101); the center of the clear vision area (200) coincides with the optical center (103) of the mother lens (10), the clear vision area (200) is located in an area ranging from 3 mm to 6 mm from the optical center (103), and the modulation area (100) is located in an area ranging from 3 mm to 35 mm from the optical center (103); The area of ​​the modulation zone (100) is S1, and the orthographic projection area of ​​the microstructure (20) in the modulation zone (100) along a direction perpendicular to the first body (101) is S2, satisfying: 0.5≤S2 / S1≤0.

8.

3. The microstructured eyeglass lens according to claim 1, wherein: The refractive power of the first lens (201) is P1D, the refractive power of the second lens (202) is P2D, and the refractive power of the first body (101) is P0D, satisfying: 2.5≤|P1-P0|≤8.0, and 10≤|P2-P0|≤32, 8≤|P2-P1|≤30.

4. The microstructured eyeglass lens according to claim 1, wherein: The sag height of the first lens (201) is H1 μm, and the sag height of the second lens (202) is H2 μm, satisfying: 2≤H2 / H1≤20, 0.5≤H1≤5, 1≤H2≤10.

5. The microstructured eyeglass lens according to claim 2, wherein: The first body (101) and the second body (102) are integrally formed; the mother lens (10) comprises a second optical surface (104) close to the eye side and a first optical surface (105) arranged opposite to the second optical surface (104); wherein the microstructure (20) is located on the first optical surface (105); or, the microstructure (20) is located on the second optical surface (104); or, the microstructure (20) is located between the first optical surface (105) and the second optical surface (104); the surface shapes of the first optical surface (105) and the second optical surface (104) are selected from at least one of a spherical surface, an aspherical surface, and a free-form surface.

6. The microstructured eyeglass lens according to claim 1, wherein: The surface shape of the first lens (201) is selected from at least one of a spherical surface, an aspherical surface, a toric surface, a cylindrical surface, and a free-form surface; the surface shape of the second lens (202) is selected from at least one of a spherical surface, an aspherical surface, a toric surface, a cylindrical surface, and a free-form surface.

7. The microstructured eyeglass lens according to claim 1, wherein: The diameters of the first lens (201) and the second lens (202) are 0.1-2 mm; the first lens (201) and the second lens (202) are circular convex lenses or circular concave lenses; and the sum of the diameters of the first lens (201) and the second lens (202) is less than or equal to the pupil diameter.

8. The microstructured eyeglass lens according to claim 1, wherein: The first lens (201) and the second lens (202) are connected in a manner that their edges are tangent or connected.

9. The microstructured eyeglass lens according to claim 1, wherein: The first lenses (201) and the second lenses (202) are connected alternately in sequence.

10. The microstructured eyeglass lens according to claim 1, wherein: The diffuse spot generated on the retina by the light passing through the second lens (202) has a first RMS radius value, and the diffuse spot generated on the retina by the light passing through the first lens (201) has a second RMS radius value, and the first RMS radius value is greater than the second RMS radius value.

11. A method for designing a microstructured eyeglass lens, wherein: The following steps are involved: A mother mirror (10) is provided, wherein the mother mirror (10) has a clear vision area (200) and a modulation area (100), wherein the modulation area (100) surrounds the clear vision area (200), and the mother mirror (100) comprises a first body (101) located in the modulation area (100); grids (300) arranged in an array are arranged in the modulation area (100), and the grids (300) are connected to each other; Providing a first lens (201), wherein the first lens (201) is disposed in the grid (300) and connected to the first body (101), and is used to cooperate with the first body (101) to form defocus; Providing a second lens (202), wherein the second lens (202) is arranged in the grid (300) and connected to the first body (101), and is used to cooperate with the first body (101) to form a diffuse spot; The first lens (201) and the second lens (202) are connected and expose a portion of the first body (101), so that the modulation area (100) can simultaneously generate a clear visual signal, a defocused signal, and a diffuse spot modulation signal.

12. The method for designing a microstructured eyeglass lens according to claim 11, wherein: The grid (300) is at least one of a regular polygon, a circle or an ellipse.

13. The method for designing a microstructured eyeglass lens according to claim 11, wherein: The grid (300) is a regular hexagon, and the first lens (201) and the second lens (202) are arranged in the shape of an inscribed circle of the regular hexagon.

14. The method for designing a microstructured eyeglass lens according to claim 11, wherein: The step of providing a mother lens (10) further comprises: determining the surface parameters of the mother lens (10) according to the prescription and the refractive index of the mother lens material, and establishing a mother lens model; The step of providing the first lens (201) further comprises: determining the surface parameters and diameter of the first lens (201); determining the position of the first lens (201) in the modulation area (100) according to the arrangement of the grid (300), and forming the first lens (201) on the surface of the mother lens model; The step of providing the second lens (202) further includes: determining the surface parameters and diameter of the second lens (202); determining the positions of all the second lenses (202) in the modulation area (100) according to the arrangement of the grid (300); and forming the second lens (202) on the surface of the mother lens model.

15. The method for designing a microstructured eyeglass lens according to claim 14, wherein: The step of determining the surface parameters of the second lens (202) further comprises: Performing optical simulation on a mother lens model having a first lens (201) and a second lens (202) formed on the surface thereof, obtaining the size and shape of a diffuse spot produced on the retina by the maximum off-axis field of view light of the second lens (202), so as to determine the RMS radius value of the diffuse spot; The diameter of the second lens (202) is kept unchanged, the single-side average optical focal length or sagittal height of the second lens (202) is gradually changed, and a relationship between the single-side average optical focal length or sagittal height and the RMS radius value of the diffuse spot is established through regression analysis; According to the RMS radius value of the diffuse spot added for the wearer, combined with the relationship, the single-sided average optical power or sagittal height of the second lens (202) is obtained to obtain the surface parameters of the second lens.

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