Out-of-focus lens for preventing hyperopia astigmatism and myopia astigmatism based on optical focusing

Abstract

The invention discloses an out-of-focus lens for preventing hyperopia and myopia astigmatism based on optical focusing, and relates to the technical field of injection molding equipment, the out-of-focus lens comprises a first single-light lens, and further comprises an out-of-focus correction part which is arranged on the first single-light lens and is used for correcting the out-of-focus amount of the periphery of the retina, the defocus correction component comprises a second single-light lens and a third single-light lens, the second single-light lens and the third single-light lens are embedded into the first single-light lens, a plurality of groups of micro lenses are fixed on the surface of the first single-light lens, and the change relation of defocus amount is delta = uv / vs, different refractive indexes are set for the second single-light lens and the third single-light lens, further refraction can be carried out on the micro lenses located on the periphery, so that the image distance of the defocusing lens is changed, the defocusing amount of the defocusing lens can be changed when the image distance is changed, the defocusing amount of the periphery of the retina can be improved, and the retina imaging quality is improved. The method has better visual stability and provides a stable prevention and control effect.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding equipment, in particular to a defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing. Background Art

[0002] Defocus glasses are also called frame glasses that reduce peripheral retinal defocus. The lenses are divided into two areas. The central optical area is a single-vision lens, and the peripheral functional area is distributed with concentrically arranged annular micro-cylindrical lenses. The image at the center of vision is projected onto the retina, and its periphery is projected onto or in front of the retina. The defocused image is used to control the growth of the eye axis and delay the progression of myopia.

[0003] Defocus lenses distribute multiple special optical focal points on the lens so that the image of the retina's periphery can also fall in front of or on the retina. The eyeball will develop myopia when it is stimulated by continuous hyperopic defocus (i.e., the image is behind the retina). The eyeball will develop hyperopia when it is stimulated by continuous myopic defocus (i.e., the image is in front of the retina). The single-vision lenses on the market can correct central vision, but will affect the quality of peripheral retinal imaging. The central object image is projected onto the fovea of ​​the retina, but its periphery is projected behind the retina, which will cause the retina to stretch backwards and accelerate the development of myopia (the principle of hyperopia is similar). The lens on the defocus lens can reduce the peripheral In addition to correcting central refractive errors, defocus lenses can also correct peripheral hyperopia or create peripheral myopic defocus, projecting peripheral images onto the retina or in front of the retina, thereby delaying the development of myopia or hyperopia. The defocus lenses in the prior art have relatively stable vision when looking straight ahead, but when using the defocus area of ​​the lens to look close, it is sometimes necessary to tilt the viewing angle to observe objects. Since the degree of each microlens is constant, the defocus formed on the retina of the fundus is also fixed. The closer the retinal area is to the upper and lower poles of the eyeball, the less defocus there is. This may lead to insufficient defocus in the periphery of the retina during use, which has the potential to deepen the patient's astigmatism. Summary of the invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing.

[0005] To achieve the above object, the present invention provides the following technical solution: a defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing, comprising a first single vision lens, and further comprising:

[0006] A defocus correction component is provided on the first single vision lens and is used to correct the defocus amount of the retina periphery;

[0007] The defocus correction component includes a second single-vision lens and a third single-vision lens, wherein the second single-vision lens and the third single-vision lens are embedded in the first single-vision lens, and a plurality of groups of micro lenses are fixed on the surface of the first single-vision lens;

[0008] The relationship between the change of the defocus amount is "δ=uv / vs", wherein v is the image distance, u is the object distance, and s is the distance between the defocus lens and the object distance.

[0009] As a preferred solution of the present invention, the first single-vision lens includes an optical zone, a paracentral zone, a sub-central zone and a peripheral zone, and the optical zone, the paracentral zone, the sub-central zone and the peripheral zone are distributed in sequence from the center of the first single-vision lens to the outside.

[0010] As a preferred solution of the present invention, the optical zone, paracentral zone, subcentral zone and peripheral zone, each zone accounts for 18%, 42%, 25% and 17% of the light reaching the fundus.

[0011] As a preferred solution of the present invention, the second single-vision lens is located inside the paracentral area, the third single-vision lens is located inside the sub-central area, and the microlens covers the sub-central area and the paracentral area.

[0012] As a preferred solution of the present invention, the refractive index of the second single-vision lens is greater than that of the first single-vision lens, and the refractive index of the third single-vision lens is greater than that of the second single-vision lens.

[0013] As a preferred solution of the present invention, the microlenses are annular in shape, and a 2.5 mm interval is maintained between two adjacent groups of microlenses.

[0014] As a preferred solution of the present invention, the diameter of the optical area is 9 mm, and its surface is covered with a Diamond Crystal A series film layer.

[0015] As a preferred solution of the present invention, the refractive index of the microlens 2 and the first single-vision lens 1 is the same.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention sets different refractive indices for the second single-vision lens and the third single-vision lens, thereby being able to further refract the microlenses located at the periphery, thereby changing the image distance of the defocus lens. When the image distance changes, the defocus amount of the defocus lens can be changed, thereby increasing the defocus amount of the retina periphery, making it have better visual stability and providing a stable prevention and control effect.

[0018] 2. The present invention can change the angle of light propagation through the second single-vision lens and the third single-vision lens. When the incident angle is constant, the greater the refractive index, the smaller the refraction angle will actually become. At this time, the distance between the image and the lens will change. Since the closer to the upper and lower retinal areas of the eyeball, the less the defocus amount, by changing the image distance, the defocus amount can be changed, making the vision more stable and the astigmatism degree less likely to increase.

[0019] 3. The present invention refracts the light source passing through the microlens through the microlens, so that it forms an image in front of the retina, causing the eyeball to grow in front of the retina, shortening the eye axis, and developing the refractive state of the eyeball toward hyperopia, thereby delaying the development of myopia; hyperopia requires imaging behind the retina, which lengthens the eye axis and delays the development of hyperopia.

[0020] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 is a schematic structural diagram of a first single vision lens of the present invention;

[0023] Figure 3 It is a schematic cross-sectional structural diagram of the front side of the present invention;

[0024] Figure 4 It is a schematic cross-sectional structural diagram of the side of the present invention;

[0025] Figure 5 This is a schematic diagram of the microlens imaging structure of the improved front defocus lens of the present invention;

[0026] Figure 6 This is a schematic diagram of the microlens imaging structure of the improved defocus lens of the present invention.

[0027] In the figure: 1. first single-vision lens; 101. optical area; 102. paracentral area; 103. subcentral area; 104. peripheral area; 2. microlens; 3. second single-vision lens; 4. third single-vision lens. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-6 As shown, the present invention provides a defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing, comprising a first single vision lens 1, and further comprising:

[0030] A defocus correction component, which is arranged on the first single-vision lens 1 and is used to correct the defocus amount of the retina periphery;

[0031] The defocus correction component includes a second single-vision lens 3 and a third single-vision lens 4, the second single-vision lens 3 and the third single-vision lens 4 are embedded in the first single-vision lens 1, and a plurality of groups of micro lenses 2 are fixed on the surface of the first single-vision lens 1;

[0032] The relationship between the change in defocus amount is "δ=uv / vs", where v is the image distance, u is the object distance, and s is the distance between the defocus lens and the object distance.

[0033] Through the design of the second single-vision lens 3 and the third single-vision lens 4, since the defocus amount of the microlens 2 located at the periphery is small, the refractive index of the second single-vision lens 3 and the third single-vision lens 4 can further refract the microlens 2 located at the periphery, thereby changing the image distance of the defocused lens. When the image distance changes, the defocus amount of the defocused lens can be changed, and then the defocus amount of the retina periphery can be increased, so that it has better visual stability and provides a stable prevention and control effect.

[0034] like Figure 2 As shown, the first single-vision lens 1 includes an optical area 101, a paracentral area 102, a sub-central area 103 and a peripheral area 104. The optical area 101, the paracentral area 102, the sub-central area 103 and the peripheral area 104 are distributed in sequence from the center of the first single-vision lens 1 to the outside. The second single-vision lens 3 is located inside the paracentral area 102, the third single-vision lens 4 is located inside the sub-central area 103, and the microlens 2 covers the sub-central area 103 and the paracentral area 102.

[0035] By arranging the second single-vision lens 3 inside the paracentral area 102 and the third single-vision lens 4 inside the subcentral area 103, whose positions correspond to the microlens 2, it is possible to refract light sources closer to the upper and lower retinal areas of the eyeball to different degrees, thereby increasing the defocus amount.

[0036] like Figure 2As shown, the optical zone 101, the paracentral zone 102, the sub-central zone 103 and the peripheral zone 104, the proportion of light reaching the fundus in each zone is 18%, 42%, 25% and 17% (the light outside the frame is less than 5% and is not considered), the refractive index of the second single-vision lens 3 is greater than the refractive index of the first single-vision lens 1, and the refractive index of the third single-vision lens 4 is greater than the refractive index of the second single-vision lens 3.

[0037] The second single-vision lens 3 and the third single-vision lens 4 can change the angle of light propagation. When the incident angle is constant, the greater the refractive index, the smaller the refraction angle will actually be. At this time, the distance between the image and the lens will be changed. Since the closer to the upper and lower retinal areas of the eyeball, the less defocus, by changing the image distance, the defocus can be changed, making the vision more stable and preventing the astigmatism from increasing.

[0038] The actual refractive index of the third single-vision lens 4 and the second single-vision lens 3 is selected according to the actual myopia degree of the patient.

[0039] like Figure 1 , 4 As shown, the microlenses 2 are ring-shaped, and a 2.5 mm interval is maintained between two adjacent groups of microlenses 2 .

[0040] Through the design of the microlens 2, the light source passing through the microlens 2 will be refracted so that it forms an image in front of the retina, causing the eyeball to grow in front of the retina, shortening the eye axis, and developing the refractive state of the eyeball toward hyperopia, thereby delaying the development of myopia; hyperopia requires imaging behind the retina, which lengthens the eye axis and delays the development of hyperopia.

[0041] like Figure 2 As shown, the diameter of the optical region 101 is 9 mm, and its surface is covered with a Diamond Crystal A series film layer.

[0042] The film layer covering the surface of the optical region 101 has the functions of reducing reflection, resisting dirt, resisting abrasion, being waterproof and protecting against ultraviolet rays.

[0043] like Figure 1 , 6 As shown, the refractive index of the microlens 2 and the first single vision lens 1 is the same.

[0044] The microlens 2 can be used to perform special refraction and scattering of light, so that peripheral light can be defocused in front of the retina along the designed path, ensuring the control of the eye axis growth.

[0045] Working principle:

[0046] The second single-vision lens 3 and the third single-vision lens 4 can change the angle of light propagation. When the incident angle is constant, the greater the refractive index, the smaller the refraction angle will actually be. At this time, the distance between the image and the lens will change. Since the closer to the upper and lower retinal areas of the eyeball, the less the defocus amount, by setting different refractive indices for the second single-vision lens 3 and the third single-vision lens 4, the microlens 2 located at the periphery can be further refracted, thereby changing the image distance of the defocus lens. When the image distance changes, the defocus amount of the defocus lens can be changed, thereby increasing the defocus amount of the retina periphery, so that it has better visual stability.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing, comprising a first single vision lens (1), characterized in that: Also includes: A defocus correction component, which is arranged on the first single-vision lens (1) and is used to correct the defocus amount of the retinal periphery; The defocus correction component comprises a second single-vision lens (3) and a third single-vision lens (4), wherein the second single-vision lens (3) and the third single-vision lens (4) are embedded in the first single-vision lens (1), and a plurality of groups of microlenses (2) are fixed on the surface of the first single-vision lens (1); The relationship between the defocus amount and the image distance is "δ=uv / vs", wherein v is the image distance, u is the object distance, and s is the distance between the defocus lens and the object distance.

2. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 1, characterized in that: The first single-vision lens (1) comprises an optical zone (101), a paracentral zone (102), a sub-central zone (103) and a peripheral zone (104); the optical zone (101), the paracentral zone (102), the sub-central zone (103) and the peripheral zone (104) are distributed in sequence from the center of the first single-vision lens (1) to the outside.

3. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 2, characterized in that: The optical area (101), the paracentral area (102), the subcentral area (103) and the peripheral area (104), each area accounts for 18%, 42%, 25% and 17% of the light reaching the fundus.

4. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 2, characterized in that: The second single-vision lens (3) is located inside the paracentral area (102), the third single-vision lens (4) is located inside the sub-central area (103), and the microlens (2) covers the sub-central area (103) and the paracentral area (102).

5. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 1, characterized in that: The refractive index of the second single-vision lens (3) is greater than the refractive index of the first single-vision lens (1), and the refractive index of the third single-vision lens (4) is greater than the refractive index of the second single-vision lens (3).

6. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 1, characterized in that: The microlenses (2) are annular in shape, and a 2.5 mm interval is maintained between two adjacent groups of microlenses (2).

7. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 2, characterized in that: The optical region (101) has a diameter of 9 mm, and its surface is covered with a Diamond Crystal A series film layer.

8. The defocused lens for preventing hyperopia, myopia and astigmatism based on optical focusing according to claim 1, characterized in that: The microlens (2) and the first single-vision lens (1) have the same refractive index.

Images