Myopia control lens
By designing myopia control lenses with small-diameter microlenses and self-similar fractal structures, the problem of unsatisfactory imaging quality in existing technologies has been solved, achieving high-quality imaging and effective myopia control, while improving wearing comfort and control effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU SUMINGDA OPTICS CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-23
AI Technical Summary
The existing myopia control lenses have unsatisfactory image quality in the defocus area, resulting in strong blurriness and suboptimal image quality.
The microlenses are designed with diameters ranging from 0.6 mm to 0.25 mm and are arranged in a fractal structure with self-similar features. By combining photolithography technology and polycarbonate (PC) material, multi-scale periodic defocus signals are formed. A central region without microlenses is set to optimize the defocus gradient and fill rate of the microlenses.
It improves image quality, enhances prevention and control effects, reduces wearing discomfort, improves visual comfort and functionality, and allows for better adaptation during the adaptation period.
Smart Images
Figure CN224399690U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical lens technology, specifically to a myopia control lens. Background Technology
[0002] Myopia control lenses utilize special optical designs to focus peripheral light at specific locations in front of or behind the retina, altering retinal growth signals and slowing axial elongation. Among related technologies, myopia control lenses are primarily developed based on DOT, DIMS, and DISC technologies. DOT lenses are developed based on the theory of retinal contrast signals; DISC is a soft corneal contact technology commonly used in contact lenses; and DIMS lenses are based on peripheral defocus theory. Both DIMS and DISC lenses rely on defocus control.
[0003] In existing technologies, myopia control lenses based on peripheral defocus theory typically have microlenses in the defocus zone ranging from 1.5mm to 0.6mm in size. Since the defocus control principle is to stimulate the eyeball through the defocus signal of the peripheral microlenses, thereby inhibiting the elongation of the eye axis and achieving the control effect, the image does not fall on the retina, but forms a small-diameter diffused circular spot, which causes the human eye to feel blurred and the image quality is not ideal.
[0004] Based on this, this application proposes a myopia control lens in order to solve at least one of the aforementioned problems. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a myopia control lens that solves the problem of unsatisfactory image quality in the defocus area of existing myopia control lenses.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] This application provides a myopia control lens, including a lens element, which comprises:
[0008] Multiple microlenses form an ultrastructure region;
[0009] The diameter of the microlens is 0.6mm-0.25mm.
[0010] In a preferred embodiment, some microlenses are arranged in an array to form multiple first lens groups, and the multiple first lens groups are repeatedly arranged in an array to form a second lens group, for iterative generation of fractal structures with self-similar characteristics.
[0011] In a more preferred embodiment, the microlenses are regular polygons and are arranged edge-to-edge to form multiple first lens groups. The multiple first lens groups are arranged edge-to-edge to form second lens groups, which are used to iteratively generate fractal structures with self-similar characteristics.
[0012] In a further preferred embodiment, the microlens is hexagonal in shape.
[0013] In one embodiment, the lens element also includes a central region without microlenses.
[0014] In one embodiment, multiple microlenses have a defocus gradient difference of -10D to +10D, where D represents diopter and ±10D is the extreme defocus.
[0015] In a preferred embodiment, the microlens sagittal height is 0.8-1.2 μm.
[0016] In one embodiment, the array fill rate of the microstructure region is 85%-95%.
[0017] In a preferred embodiment, the ultrastructure region is fabricated using photolithography.
[0018] In one embodiment, the lens element 1 is made of polycarbonate (PC).
[0019] This invention provides a myopia control lens. Compared with the prior art, it has the following advantages:
[0020] This application provides a myopia control lens that, by setting a small radius microlens diameter (0.6mm-0.25mm), reduces the size of the light spot formed on the retina by the microlens defocus signal, making it smaller than the size that the human eye can distinguish, thereby improving image quality and enhancing the control effect. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the lens structure for myopia control provided in an embodiment of the present invention.
[0023] Figure 2 This is a three-dimensional schematic diagram of a myopia control lens provided for an embodiment of the present utility model.
[0024] Figure 3 An enlarged view of part A provided for an embodiment of this utility model.
[0025] In the diagram: 1. Lens element; 2. Microlens; 3. Ultrastructural region; 4. Central region;
[0026] 31. First lens group; 32. Second lens group. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0028] This application provides a myopia control lens that solves the problem of unsatisfactory imaging quality in the defocus area of existing myopia control lenses, thereby improving visual quality while increasing contrast / defocus amount and enhancing the control effect.
[0029] The technical solution in this application is to solve the aforementioned technical problems, and the overall approach is as follows:
[0030] In existing myopia control lenses based on peripheral defocus theory, the microlenses in the defocus area are typically between 1.5mm and 0.6mm in size. The image formed by these peripheral microlenses does not fall onto the retina but instead forms a small, diffused circular spot (i.e., a circle of confusion), causing blurriness in the human eye and resulting in suboptimal image quality. However, the human eye's resolving power is limited. When the diameter of the circle of confusion is smaller than a certain value, the blur is imperceptible. This is called the permissible circle of confusion. Generally, the diameter of the permissible circle of confusion is around 0.125mm.
[0031] When the diameter of the circle of confusion is smaller than a certain threshold, the human eye cannot perceive the blur. By reducing the lens size, the diameter of the circle of confusion can be reduced, thereby improving image quality. At the same time, the light effect signal of contrast is still present, thus improving visual quality while increasing contrast / defocus, thereby enhancing the control effect.
[0032] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0033] Example 1:
[0034] See Figures 1-2As shown, the myopia control lens provided in this application includes a lens element 1, which includes a plurality of microlenses 2, which form an ultrastructural region 3; wherein the diameter of the microlenses 2 is 0.6mm-0.25mm.
[0035] It should be noted that by setting a smaller radius microlens diameter (0.6mm-0.25mm), the size of the spot formed on the retina by the microlens defocus signal can be reduced, making it smaller than the size that the human eye can distinguish, thereby improving the imaging quality and enhancing the prevention and control effect.
[0036] See Figures 1-3 As shown, in a preferred embodiment, some microlenses 2 are arranged in an array to form multiple first lens groups 31, and the multiple first lens groups 31 are repeatedly arranged in an array to form a second lens group 32, which is used to iteratively generate fractal structures with self-similar characteristics.
[0037] It should be noted that the fractal structure with self-similar features can repeat the periodic pattern of the microlens-lensless region at different scales, thereby forming a multi-scale periodic defocus signal on the retina, simulating the defocus gradient of objects at different distances in natural vision (similar to the blurring levels of near and far objects), thus enhancing the control effect; and the fractal structure with self-similar features can make the transition of the wearer's line of sight from the ultrastructure region 3 to other regions where there are no microlenses 2 more smooth, reducing the discomfort of wearing.
[0038] In a more preferred embodiment, the microlens 2 is in the shape of a regular polygon, and multiple first lens groups 31 are formed by aligning edges together. The multiple first lens groups 31 are arranged in a repeated edge-to-edge alignment to form a second lens group 32, which is used to iteratively generate a fractal structure with self-similar characteristics.
[0039] It should be noted that the microlenses with regular polygonal structures are arranged by edge-to-edge bonding, which improves the utilization rate of the lens area and allows for the arrangement of more microlenses, thus forming more defocus signals on the retina and improving the control effect.
[0040] In a further preferred embodiment, the microlens 2 is hexagonal in shape.
[0041] It should be noted that the microlens 2 is hexagonal in shape. The regular hexagon can achieve a close-packed arrangement without gaps, maximizing the use of the lens surface space and ensuring structural uniformity. This makes the defocus signal is isotropically distributed in the horizontal, vertical and diagonal directions, avoiding local optical blind spots or aberrations. At the same time, the symmetry of the regular hexagon reduces the difficulty of microstructure fabrication.
[0042] Example 2:
[0043] See Figures 1-3 As shown, the myopia control lens provided in this application includes all the contents of Embodiment 1 and its preferred embodiments. In addition, the lens element 1 also includes a central region 4 without microlenses 2.
[0044] It should be noted that: the central area 4 does not contain microlenses 2. As the core area for visual focusing, the central area 4 meets the wearer's daily visual needs, avoids the impact of the ultra-microstructure area 3 on the wearer's central vision, reduces visual fatigue and discomfort during the adaptation period, and improves wearing comfort and functionality; it also allows the central area 4 to maintain the original contrast transmission, reducing the impact of contrast loss on the sensitive period of visual development of young wearers.
[0045] Example 3:
[0046] This application provides a myopia control lens, including all the contents of Embodiments 1-2 and their preferred embodiments. In addition, multiple microlenses 2 have a defocus gradient difference of -10D to +10D, where D represents diopter and ±10D is the extreme defocus.
[0047] It should be noted that the multiple microlenses 2 are set with a defocus gradient difference of -10D to +10D, which can provide precise compensation for the defocus needs of different positions on the retina, simulate the refractive changes from far to near in natural vision, ensure the wearer's visual comfort, and enhance the myopia control effect.
[0048] In a preferred embodiment, the microlens 2 has a sagittal height of 0.8-1.2 μm.
[0049] It should be noted that the sag is the vertical distance from the vertex to the edge of the lens surface. A sag of 0.8-1.2μm can form an effective defocus signal around the retina while avoiding a significant increase in aberrations or uneven lens thickness due to an excessively large sag. This reduces processing difficulty and manufacturing costs, and keeps the overall lens thickness within a comfortable wearing range.
[0050] Example 4:
[0051] This application provides a myopia control lens, including all the contents of Examples 1-3 and their preferred embodiments. In addition, the array fill rate of the ultrastructure region 3 is 85%-95%.
[0052] It should be noted that a high fill ratio ensures that the microstructure region can provide sufficient defocus signal, thus guaranteeing the control effect.
[0053] In a preferred embodiment, the ultrastructure region 3 is processed using photolithography.
[0054] It should be noted that most existing lenses with microlens structures are processed using molding technology. However, for the microlens structure with a smaller diameter in this application, photolithography is used to process it, which is in line with its high precision and high resolution characteristics and avoids uneven defocus signals or aberrations caused by processing deviations.
[0055] Example 5:
[0056] This application provides a myopia control lens, including all the contents of Examples 1-4 and their preferred embodiments. In addition, the lens element 1 is made of polycarbonate PC.
[0057] It should be noted that polycarbonate (PC) is a common lens material, with high light transmittance to ensure accurate transmission of the microlens defocus signal; it has good impact resistance, which can effectively protect the structure of the small microlens radius in this application, while also having the stability of weather resistance, aging resistance, temperature resistance, and chemical corrosion resistance.
[0058] In summary, compared with existing technologies, it has the following beneficial effects:
[0059] 1. This application provides a myopia control lens that, by setting a small radius microlens diameter (0.6mm-0.25mm), reduces the size of the light spot formed on the retina by the microlens defocus signal, making it smaller than the size that the human eye can distinguish, thereby improving the image quality and enhancing the control effect.
[0060] 2. This application arranges microlenses into a fractal structure with self-similar features, thereby forming a multi-scale periodic defocus signal on the retina, simulating the defocus gradient of objects at different distances in natural vision (similar to the blurring levels of near and far objects), thus enhancing the control effect; and the fractal structure with self-similar features makes the transition of the wearer's line of sight from the ultrastructure area to the central area smoother, reducing the discomfort of wearing.
[0061] 3. By setting a central area without microlenses, this application avoids the impact of ultra-microstructure areas on the wearer's central vision, reduces visual fatigue and discomfort during the adaptation period, and improves wearing comfort and functionality; it also allows the central area to maintain the original contrast transmission, reducing the impact of contrast loss on the sensitive period of visual development in young wearers.
[0062] 4. By setting the defocus gradient of the microlens and the filling rate of the ultrastructure region, this application forms a sufficient multi-scale defocus signal, which improves the wearer's comfort and enhances the myopia control effect.
[0063] 5. This application reduces the processing difficulty and avoids uneven defocus signals or aberrations caused by processing deviations by setting the microlens sagittal height to 0.8-1.2μm, using polycarbonate (PC) as the lens material, and employing photolithography technology.
[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0065] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A myopia control lens, characterized in that, Includes a lens element (1), said lens element (1) comprising: Multiple microlenses (2) form an ultrastructure region (3); The microlens (2) has a diameter of 0.6 mm to 0.25 mm. Some of the microlenses (2) are arranged in an array to form multiple first lens groups (31). Multiple first lens groups (31) are repeatedly arranged in an array to form a second lens group (32), which is used to iteratively generate a fractal structure with self-similar characteristics. The microlenses (2) are regular polygons and are arranged by edge-to-edge contact to form multiple first lens groups (31). Multiple first lens groups (31) are repeatedly arranged by edge-to-edge contact to form the second lens group (32), which is used to iteratively generate a fractal structure with self-similar characteristics.
2. The myopia control lens as described in claim 1, characterized in that, The lens element (1) also includes a central region (4) excluding the microlens (2).
3. The myopia control lens as described in claim 1, characterized in that, The multiple microlenses (2) have a defocus gradient difference of -10D to +10D, where D represents diopter and ±10D is the extreme defocus.
4. The myopia control lens as described in claim 1, characterized in that, The microlens (2) has a sagittal height of 0.8-1.2 μm.
5. A myopia control lens as described in claim 1, characterized in that, The array fill rate of the ultrastructure region (3) is 85%-95%.
6. A myopia control lens as described in claim 1, characterized in that, The ultrastructure region (3) is processed using photolithography.
7. A myopia control lens as described in claim 1, characterized in that, The lens element (1) is made of polycarbonate.
8. A myopia control lens as described in claim 1, characterized in that, The microlens (2) is hexagonal in shape.