Scattering symmetric multi-point out-of-focus lens and frame glasses thereof

Abstract

The utility model relates to a scattering symmetric multi-point out-of-focus lens and a pair of frame glasses thereof. The scattering symmetric multi-point out-of-focus lens comprises a central optical region, a micro lens distribution region and an edge region which are arranged on a lens substrate, the central optical area is arranged at the geometric center of the lens base body; the micro-lens distribution area is arranged on the periphery of the central optical area and is an annular area with a specific radius; the micro lens group comprises a large lens and two small lenses; the micro-lenses are distributed in an annular scattering central symmetry manner in the annular area of the micro-lens distribution area; engraving grids are arranged on the distribution area and the edge area of the micro lens, and the engraving grids are tiny scattering points engraved on the surface of the lens by engraving equipment with nanoscale precision. According to the myopia prevention and control lens, the nanometer carving technology and the multi-point micro lens defocusing combined technology are adopted, dry astigmatism caused by stray light is avoided, dynamic defocusing intervention is carried out, the eye axis increasing process is greatly delayed, the comfort degree is more effectively improved, and myopia prevention and control are efficiently carried out.

Description

Technical Field

[0001] This utility model relates to the field of defocus lens technology, and in particular to a scattering symmetrical multi-point defocus lens and its frame glasses. Background Technology

[0002] Myopia defocus lenses are a type of eyeglass lens designed based on the principle of peripheral myopia defocus. When worn, objects appear in the eye in a peripheral retinal myopia defocused state. This defocused image controls axial growth and slows down the progression of myopia. The defocus amount on the lens is designed to create a defocus signal in front of the retina, which affects axial growth and thus inhibits the progression of myopia.

[0003] Currently, most multi-point defocus lenses in existing technology adopt a linear fixed defocus application method, which does not take into account the refractive power of myopic patients with refractive errors. Applying a one-size-fits-all defocus amount may result in over-application and overcorrection.

[0004] Furthermore, in existing defocused lenses, the edges of the microlenses / microcylinders attached to the front surface of the lens are second-order non-differentiable at the point where they meet the circular contact of the lens, resulting in a stray light band with high cylinder. The greater the defocus, the larger the stray light band becomes, with measured values ​​reaching approximately 120% of the defocus amount. Long-term wear can lead to interventional astigmatism, increasing astigmatism. The focusing effect of the microlenses forms a large area of ​​point-like high-energy light, which is projected onto the retina. Long-term wear can cause retinal damage in myopic patients, and the greater the defocus, the more pronounced the effect, potentially causing myopic patients to see a patch of bright spots in their vision.

[0005] Therefore, the existing technology has problems and needs further improvement and development. Summary of the Invention

[0006] (I) Purpose of the utility model: In order to solve the problems existing in the prior art, the purpose of this utility model is to provide a scattering symmetry multi-point defocus lens and its frame glasses.

[0007] (II) Technical Solution: In order to solve the above technical problems, this technical solution provides a scattering symmetry multi-point defocus lens, including a central optical area, a microlens distribution area and an edge area disposed on the lens substrate; the central optical area is disposed at the geometric center of the lens substrate; the microlens distribution area is disposed around the central optical area, and microlenses are disposed on concentric rings with the geometric center of the lens substrate as the center within the microlens distribution area.

[0008] Each ring contains several microlenses, and each microlens group includes one large lens and two small lenses. The center of the bottom surface of the large lens is located on the concentric rings, one small lens is located inside the concentric rings, and the other small lens is located outside the concentric rings and is tangent to the concentric rings passing through the center of the bottom surface of the large lens of the lens group. The innermost small lens on the innermost ring is tangent to the central optical area.

[0009] Furthermore, the microlens is spherical and convex; the maximum diameter of the macrolens is 1mm to 2mm, and the maximum diameter of the microlens is 0.8mm to 1.2mm.

[0010] Furthermore, the defocusing amount of the large lens is 3.00D~5.00D, and the defocusing amount of the small lens is 2.50D~4.50D.

[0011] Furthermore, the distance between the center of the bottom surface of the large lens and the small lens is 1.05 mm. The lines connecting the center of the bottom surface of the two small lenses to the center of the bottom surface of the large lens form an included angle α, with α ranging from 40° to 90°.

[0012] Furthermore, the central optical region is a circular area with a diameter of 6mm to 8mm, and the center of the central optical region coincides with the geometric center of the lens substrate.

[0013] Furthermore, the microlens distribution area is an annular region with a specific radius, and the inner diameter of the annular region of the microlens distribution area is equal to the diameter of the central optical region. The myopia defocus intervention applied by the microlens distribution area occurs within a field of view of 10 to 20 degrees from the fovea of ​​the retina.

[0014] Furthermore, the microlenses are arranged in a ring-shaped, centrally symmetrical manner in the annular region of the microlens distribution area, with the lens group of the outer ring set at the corresponding gap position of the lens group of the inner ring. At the same time, the number of lens groups in each ring increases regularly.

[0015] Furthermore, the direction of each lens group in each ring is arranged counterclockwise around the geometric center of the lens substrate, and they are centrally symmetrical about the geometric center of the lens substrate; the spacing between each lens group is greater than or equal to 0.05 mm.

[0016] Furthermore, an engraved grid is provided on the microlens distribution area and the edge area. The engraved grid fills the part of the microlens distribution area other than the lens group and the entire edge area. The engraved grid consists of tiny scattering points engraved on the lens surface by a nanometer-precision engraving device. The engraved grid is in the shape of a grid, and the side length of the grid is 0.001mm~0.003mm.

[0017] A type of eyeglass frame employs a scattering-symmetric multi-point defocusing lens as described in any of the above claims.

[0018] (III) Beneficial effects: This utility model adopts a myopia control lens that combines nano-engraving technology and multi-point microlens defocusing technology. It solves the problem of stray light caused by the junction of the microlens edge and the lens circle in existing multi-point defocusing lenses. Furthermore, by setting the microlens to symmetrical scattering and increasing the continuous defocus signal intervention, dynamic defocusing intervention is carried out, which greatly slows down the process of axial elongation, effectively improves comfort, and efficiently implements myopia control. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the planar structure of the scattering symmetry multi-point defocusing lens of this utility model;

[0020] Figure 2 This is a partially enlarged structural schematic diagram of the scattering symmetry multi-point defocusing lens of this utility model.

[0021] Figure reference numerals: 1-Lens substrate; 2-Central optical zone; 3-Microlens distribution zone; 4-Edge zone; 311-Large lens; 312-Small lens; 320-Engraved grid. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to preferred embodiments. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0023] The accompanying drawings are schematic diagrams of embodiments of the present invention. It should be noted that these drawings are for illustrative purposes only and are not drawn to scale, and should not be construed as limiting the scope of protection of the present invention.

[0024] A scattering-symmetric multi-point defocusing lens and its frame eyeglasses, wherein, as Figure 1 As shown, the scattering symmetric multi-point defocusing lens includes a central optical region 2, a microlens distribution region 3, and an edge region 4 disposed on the lens substrate 1.

[0025] The lens substrate 1 can be made of polycarbonate (PC) material to give it excellent optical performance, high impact strength, and UV resistance, but it is not limited to this and no specific limitation is made here. Preferably, the lens substrate 1 is a circular lens with a diameter of 75mm.

[0026] The central optical zone 2 is located at the geometric center of the lens substrate 1. The central optical zone 2 is a circular area with a diameter of 6mm to 8mm. The center of the central optical zone 2 coincides with the geometric center of the lens substrate 1. Preferably, the diameter of the central optical zone 2 is 6.9mm. It is used to achieve clear imaging and perform conventional vision correction so that the incident light forms a clear focal point on the retina, giving the wearer a good vision correction effect.

[0027] A microlens distribution area 3 is set around the central optical zone 2. The microlens distribution area 3 is a ring-shaped region with a specific radius, and the inner diameter of the ring-shaped region is equal to the diameter of the central optical zone 2. The myopia defocus intervention applied by the microlens distribution area occurs within a field of view of 10-20 degrees from the fovea of ​​the retina. This field of view is the angle range that can generate a defocus signal that effectively controls the development of myopia. Microlenses are arranged on concentric rings with the geometric center of the lens substrate as the center within the microlens distribution area 3. There are 17 concentric rings in total, and the center of each concentric ring is the center of the central optical zone 2. The microlenses are spherical convex protrusions. When light passes through the lens, the microlenses can form a focal point in front of the retina, producing a myopia defocus effect and slowing down the elongation of the eye axis.

[0028] Among them, such as Figure 2As shown, each ring contains several microlens groups, each group comprising one large lens 311 and two small lenses 312, both of which are spherical convex protrusions. The distance between the centers of the base surfaces of the large lens 311 and the small lenses 312 is 1.05 mm. Connecting the centers of the base surfaces of the two small lenses 312 to the center of the base surface of the large lens 311 forms an angle α, where α ranges from 40° to 90°. The center of the base surface of the large lens 311 is located on a concentric ring, which divides the angle α into a1 and a2, where a1 < a2. The small lens corresponding to a1 is a small-angle small lens, and the small lens corresponding to a2 is a large-angle small lens. The large-angle small lens is located inside the concentric ring, and the small-angle small lens is located outside the concentric ring, with the small-angle small lens being tangent to the concentric ring passing through the center of the base surface of the large lens 311. The small-angle lens on the innermost lens group is tangent to the central optical zone 2. The lens groups are centrally symmetrically distributed about the center of the lens substrate 1 on each ring, and the direction of each lens group in each ring is arranged counterclockwise around the geometric center of the lens substrate 1. The spacing between each lens group is greater than or equal to 0.05mm. The lens groups achieve dynamic defocus intervention through the combination of large and small lenses. The design of the alternating pattern of defocus amount better conforms to the visual perception characteristics of the human eye, improving visual comfort. This allows the wearer's eyes to adapt more naturally to the lens's defocus changes when looking in different directions, reducing visual discomfort caused by sudden changes in defocus amount, such as dizziness and eye strain. This makes it easier for the wearer to use the lens in daily activities, improving wearing compliance and thus better exerting the lens's effect on myopia control. The non-fixed defocus amount also reduces the body's tolerance to defocus lenses.

[0029] The large lenses 311 have a maximum diameter of 1mm to 2mm, and there are a total of 560 of them; the small lenses 312 have a maximum diameter of 0.8mm to 1.2mm, and there are a total of 1120 of them. The defocusing amount of the large lenses is 3.00D to 5.00D, and the defocusing amount of the small lenses is 2.50D to 4.50D.

[0030] Preferably, the maximum diameter of the large lens 311 is 1.2 mm, and the defocusing amount is 4.50D / 90.293.

[0031] Preferably, the maximum diameter of the small lens 312 is 0.8 mm, and the defocusing amount is 3.50D / 255.895.

[0032] The radius of each ring in the annular region of the microlens distribution area 3 is the distance from the macrolens 311 to the geometric center of the lens substrate 1. Preferably, the radius of each ring from the center to the edge of the lens substrate 1 is set to 4.65mm; 6.35mm; 8.1mm; 9.95mm; 11.65mm; 13.35mm; 15.1mm; 16.9mm; 18.7mm; 20.45mm; 22.35mm; 24.1mm; 25.85mm; 27.7mm; 29.55mm; 31.35mm; 33.2mm.

[0033] The microlenses are arranged in a ring-shaped, scattering, centrally symmetrical manner in the annular region of the microlens distribution area 3. The concentric rings are named sequentially from the geometric center of the lens substrate 1 outwards as ring 1, ring 2, ring 3, ring 4... ring 16, ring 17.

[0034] In this arrangement, a small lens 312 on each lens group of ring 1 is tangent to the outer diameter of the central optical area 2. The lens group of ring 2 is set at the corresponding gap position of the lens group of ring 1, the lens group of ring 3 is set at the corresponding gap position of the lens group of ring 2, the lens group of ring 4 is set at the corresponding gap position of the lens group of ring 3, and so on, with the number of lens groups in each ring increasing regularly.

[0035] Preferably, ring 1 has 10 lens groups; ring 2 has 1 lens group in each corresponding gap position of ring 1; ring 3 has 2 lens groups in each corresponding gap position of ring 2; ring 4 has 2 lens groups in each corresponding gap position of ring 3; ring 5 has 2 lens groups in each corresponding gap position of ring 4; ring 6 has 2 lens groups in each corresponding gap position of ring 5; ring 7 has 3 lens groups in each corresponding gap position of ring 6; ring 8 has 3 lens groups in each corresponding gap position of ring 7; ring 9 has 3 lens groups in each corresponding gap position of ring 8; and ring 10 has 10 lens groups in each corresponding gap position of ring 9. Four lens groups are set at each corresponding gap position. Ring 11 has four lens groups at each corresponding gap position of Ring 10, Ring 12 has four lens groups at each corresponding gap position of Ring 11, Ring 13 has four lens groups at each corresponding gap position of Ring 12, Ring 14 has five lens groups at each corresponding gap position of Ring 13, Ring 15 has five lens groups at each corresponding gap position of Ring 14, Ring 16 has five lens groups at each corresponding gap position of Ring 15, and Ring 17 has six lens groups at each corresponding gap position of Ring 16; the outer diameter of the annular region is 67.88 mm.

[0036] The portion between the outer diameter of the microlens distribution area 3 and the outer diameter of the lens substrate 1 is the edge region 4. For example... Figure 2As shown, an engraved grid 320 is provided on the microlens distribution area 3 and the edge area 4. The engraved grid 320 fills the portion of the microlens distribution area 3 excluding the lens group and the entire edge area 4. The engraved grid is in the shape of a grid, with a side length of 0.001mm~0.003mm. The engraved grid 320 is microstructured using nanoscale precision engraving equipment, engraving tiny scattering points on the lens surface. This allows light to scatter inside the lens, thereby reducing the high-contrast signal received by the retina, reducing the high-contrast signal detected by the retinal photoreceptor cells and the elongation signal emitted to the eye, thus slowing down the elongation of the eye axis and achieving the effect of delaying the progression of myopia.

[0037] In summary, this invention utilizes a combination of nano-engraving technology and multi-point microlens defocusing technology to create a myopia control lens. This solves the problem of stray light caused by the junction of the microlens edge and the lens circle in existing multi-point defocusing lenses. Furthermore, by designing the microlens to increase symmetrical scattering and continuously intervening with defocus signals, dynamic defocusing intervention is achieved, which greatly slows down the axial elongation process, effectively improves comfort, and efficiently implements myopia control.

[0038] The above description illustrates preferred embodiments of the present invention and helps those skilled in the art to more fully understand the technical solution of the present invention. However, these embodiments are merely illustrative and should not be construed as limiting the specific implementation of the present invention to these embodiments. For those skilled in the art, several simple deductions and modifications can be made without departing from the concept of the present invention, and all such modifications should be considered to fall within the protection scope of the present invention.

Claims

1. A scattering-symmetric multi-point defocusing lens, characterized in that, It includes a central optical region, a microlens distribution region, and an edge region disposed on the lens substrate; the central optical region is disposed at the geometric center of the lens substrate; the microlens distribution region is disposed around the central optical region, and microlenses are disposed on concentric rings with the geometric center of the lens substrate as the center within the microlens distribution region; Each ring contains several microlenses, and each microlens group includes one large lens and two small lenses. The center of the bottom surface of the large lens is located on the concentric rings, one small lens is located inside the concentric rings, and the other small lens is located outside the concentric rings and is tangent to the concentric rings passing through the center of the bottom surface of the large lens of the lens group. The innermost small lens on the innermost ring is tangent to the central optical area.

2. The scattering symmetry multi-point defocusing lens according to claim 1, characterized in that, The microlens is spherical and convex; the maximum diameter of the macrolens is 1mm to 2mm, and the maximum diameter of the microlens is 0.8mm to 1.2mm.

3. The scattering symmetry multi-point defocusing lens according to claim 1, characterized in that, The defocusing amount of the large lens is 3.00D~5.00D, and the defocusing amount of the small lens is 2.50D~4.50D.

4. The scattering symmetry multi-point defocusing lens according to claim 1, characterized in that, The distance between the center of the bottom surfaces of the large lens and the small lens is 1.05 mm. The two lines connecting the center of the bottom surfaces of the two small lenses to the center of the bottom surface of the large lens form an included angle α, with the value of α ranging from 40° to 90°.

5. A scattering-symmetric multi-point defocusing lens according to claim 1, characterized in that, The central optical area is a circular region with a diameter of 6mm to 8mm, and the center of the central optical area coincides with the geometric center of the lens substrate.

6. A scattering-symmetric multi-point defocusing lens according to claim 1, characterized in that, The microlens distribution area is an annular region with a specific radius. The inner diameter of the annular region of the microlens distribution area is equal to the diameter of the central optical region. The myopia defocus intervention applied by the microlens distribution area occurs within a field of view of 10 to 20 degrees from the fovea of ​​the retina.

7. A scattering-symmetric multi-point defocusing lens according to claim 1, characterized in that, The microlenses are arranged in a ring-shaped, centrally symmetrical manner in the annular region of the microlens distribution area. The lens group of the outer ring is set at the corresponding gap position of the lens group of the inner ring. At the same time, the number of lens groups in each ring increases regularly.

8. A scattering-symmetric multi-point defocusing lens according to claim 7, characterized in that, Each lens group in each ring is arranged counterclockwise around the geometric center of the lens substrate and is centrally symmetrical about the geometric center of the lens substrate; the spacing between each lens group is greater than or equal to 0.05 mm.

9. A scattering-symmetric multi-point defocusing lens according to claim 1, characterized in that, Engraved grids are provided on the microlens distribution area and the edge area. The engraved grids fill the part of the microlens distribution area except for the lens group and the entire edge area. The engraved grids are tiny scattering points engraved on the lens surface by a nanometer-precision engraving device. The engraved grids are in the shape of a grid, and the side length of the grid is 0.001mm~0.003mm.

10. A type of eyeglass frame, characterized in that, Includes the scattering symmetry multi-point defocusing lens as described in any one of claims 1 to 9.

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