Ultrathin presbyopic lens
By designing gradient concave surfaces and adjusting arc surfaces in the aged lens, combined with the spherical convex surface and concave structure, the reduction of lens thickness and improvement of usage performance are achieved, and the wearing discomfort caused by the large thickness of traditional aged lenses is solved.
Patent Information
- Application Number
- CN202421939368.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-09
AI Technical Summary
Traditional aging lenses have a large thickness, which leads to greater pressure on the bridge of the nose when worn, affecting comfort and performance.
An ultra-thin presbyopia lens is designed. One side of the lens main body is a first spherical convex surface and a second spherical concave surface is provided on the other side. A gradient concave surface is arranged along the outer periphery of the second spherical concave surface. It is formed by connecting several adjusting arc surfaces. The inclination angle corresponding to the adjusting arc surface gradually decreases in the direction close to the center of the lens main body.
On the premise of ensuring smooth transition surface, reduce the thickness by 20%-30%, reduce the compression on the nose bridge during long-term wear, and improve the performance of reading glasses.
Smart Images
Figure CN222939348U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to lenses, and more particularly to an ultra-thin presbyopic lens. Background Art
[0002] As people age, the human lens gradually hardens, its elasticity weakens, and the contraction ability of the ciliary muscle also decreases accordingly, resulting in a decline in the eye's accommodation ability and thus the phenomenon of difficulty in seeing nearby objects clearly, that is, presbyopia. To solve this vision problem, presbyopic lenses came into being. Presbyopic lenses, also known as progressive multifocal lenses or reading glasses, are designed to meet the visual needs of far, middle, and near distances simultaneously, providing a more convenient and comfortable visual experience for the elderly.
[0003] In traditional designs, referring to Figure 1 , the opposite sides of a presbyopic lens are respectively a spherical convex surface and a spherical concave surface, that is, spherical lenses are usually used. However, the corresponding curvature of this kind of lens is relatively large, resulting in a relatively thick thickness of the lens itself, and thus a relatively large weight of the final lens. When a lens of this weight is made into a presbyopic glasses and worn for a long time, it will cause a relatively large sense of pressure on the wearer's nose bridge, affecting the comfort and performance of wearing. Utility Model Content
[0004] The purpose of the present application is to provide an ultra-thin presbyopic lens to solve the problem of poor performance of the above-mentioned presbyopic lens during wearing.
[0005] An ultra-thin presbyopic lens provided by the present application adopts the following technical solution:
[0006] An ultra-thin presbyopic lens includes a lens body. One side of the lens body is a first spherical convex surface, and the other side of the lens body is provided with a second spherical concave surface. The lens body is provided with a gradient concave surface at the outer peripheral edge of the second spherical concave surface. The gradient concave surface is formed by connecting a plurality of adjustment arc surfaces; the cross-section of the adjustment arc surface is an adjustment arc line, the plane that abuts against the outer peripheral edge of the lens body close to the second spherical concave surface is an adjustment plane, and the angle between the straight line coinciding with the two end points of the adjustment arc surface and the adjustment plane is an inclination angle. The inclination angle corresponding to the adjustment arc surface gradually decreases in the direction close to the center of the lens body.
[0007] By adopting the above technical solution, during the application of this presbyopic lens, due to the combined setting of the gradient concave surface and the second spherical concave surface, and the inclination angle corresponding to the adjustment arc surface gradually decreases in the direction close to the center of the lens body, it is possible to reduce the thickness of the presbyopic lens of the present application by 20%-30% compared with ordinary presbyopic lenses on the premise of ensuring a sufficiently smooth transition surface, reduce the pressure on the wearer's nose bridge when the finished presbyopic glasses made of this presbyopic lens are worn for a long time, and improve the performance of the finished presbyopic glasses made of this presbyopic lens.
[0008] Optionally, the difference in the adjacent tilt angles is 1°-2°.
[0009] By adopting the above technical solution, the gradient concave surface is made smoother, improving the performance of the aging lens.
[0010] Optionally, the radii corresponding to several of the adjustment arc surfaces are the same.
[0011] By adopting the above technical solution, since the radii corresponding to the adjustment arc surfaces are the same, the smoothness at the junction of adjacent adjustment arc surfaces is improved.
[0012] Optionally, the included angle corresponding to the first spherical convex surface is 35°-40°.
[0013] By adopting the above technical solution, it helps to reduce glare and reflection, improve visual clarity and contrast, enabling the wearer to obtain a good visual experience under various lighting conditions.
[0014] Optionally, the included angle corresponding to the first spherical convex surface is 38°.
[0015] By adopting the above technical solution, a reasonable arc surface design can reduce the distortion at the edge of the lens, making the field of view more natural and wide, and an appropriate included angle helps to disperse the weight of the lens, reducing the pressure on the bridge of the nose and ears, and making it less likely to feel fatigued even after long-term wear.
[0016] Optionally, the diameter size of the second spherical concave surface is φ40mm-60mm.
[0017] By adopting the above technical solution, lenses with a diameter size within this range can be adapted to different face shapes and pupillary distances, ensuring that the lenses can be stably fixed on the frame while avoiding excessive pressure on the bridge of the nose and ears of the wearer.
[0018] Optionally, the diameter size of the second spherical concave surface is φ50mm.
[0019] By adopting the above technical solution, an appropriate lens diameter can reduce the edge thickness of the lens, making the lens look thinner and lighter, thereby improving the wearing comfort.
[0020] Optionally, the number of several of the adjustment arc surfaces is 8-13.
[0021] By adopting the above technical solution, by limiting the number of adjustment arc surfaces, the gradient concave surface is made flatter and smoother, improving its performance.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. Due to the cooperative setting of the gradient concave surface and the second spherical concave surface, and the inclination angle corresponding to the adjusting arc surface gradually decreases in the direction close to the center of the lens body, it is possible to reduce the pressure on the wearer's nose bridge during long-term wearing of the finished presbyopic glasses made of this aging lens while ensuring that the transition surface is smooth enough, and improve the performance of the finished presbyopic glasses made of this aging lens. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0025] Figure 1 is a schematic structural diagram of a traditional aging lens in the background art;
[0026] Figure 2 is a schematic structural diagram showing the overall aging lens in the embodiment of the present application;
[0027] Figure 3 is Figure 2 a partial enlarged schematic diagram of part A in;
[0028] Figure 4 is a schematic structural diagram showing the angle corresponding to the first spherical convex surface in the embodiment of the present application.
[0029] In the figure, 1 is the first spherical convex surface; 2 is the second spherical concave surface; 3 is the gradient concave surface; 31 is the adjusting arc surface; 311 is the adjusting arc line; 4 is the adjusting surface. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The following will further elaborate on the present application in conjunction with all the drawings.
[0031] Embodiment:
[0032] Referring to Figure 2 and Figure 3 , a kind of ultra-thin presbyopic lens, including a lens body. One side of the lens body is the first spherical convex surface 1, and the other side of the lens body is provided with a second spherical concave surface 2. The lens body is provided with a gradient concave surface 3 along the outer peripheral edge of the second spherical concave surface 2, and the gradient concave surface 3 is connected by a plurality of adjusting arc surfaces 31.
[0033] Wherein Figure 2 the surface corresponding to the two vertical dotted lines on the left side in is the second spherical concave surface, and the surface corresponding to the two vertical dotted lines on the right side is the gradient concave surface.
[0034] Referring to Figure 2 andFigure 3 , the cross-sectional projection of the adjusting arc surface 31 on a plane is an adjusting arc line 311, the plane that abuts against the outer peripheral edge of the lens body near the second spherical concave surface 2 is an adjusting surface 4; the angle between the straight line coinciding with both ends of the adjusting arc surface 31 and the adjusting surface 4 is an inclination angle, wherein the inclination angle corresponding to the adjusting arc surface 31 gradually decreases in the direction close to the center of the lens body.
[0035] Refer to Figure 3 , the number of several adjusting arc surfaces 31 is 8 - 13. Specifically, the number of adjusting arc surfaces 31 in the embodiment of the present application is 11; and the radii corresponding to the 11 adjusting arc surfaces 31 are the same. The difference in the adjacent inclination angles is 1° - 2°, so that the gradient concave surface 3 is smoother and the transition is more gentle, improving the use performance of the aging lens.
[0036] Refer to Figure 2 , the diameter dimension of the second spherical concave surface 2 is φ40mm - 60mm. Specifically, the diameter dimension of the second spherical concave surface 2 in the embodiment of the present application is φ50mm.
[0037] Refer to Figure 4 , the included angle corresponding to the first spherical convex surface 1 is 35° - 40°. Specifically, the included angle corresponding to the first spherical convex surface 1 in the embodiment of the present application is 38°.
[0038] The implementation principle of the embodiment of the present application is:
[0039] During the application process of the aging lens, due to the cooperative setting of the gradient concave surface 3 and the second spherical concave surface 2, on the premise of ensuring that the transition surface is smooth enough, the aging lens of the present application can reduce the thickness by 20% - 30% compared with ordinary aging lenses.
[0040] Unless otherwise defined, the terms or scientific terms used in the present application should have the ordinary meaning understood by those of ordinary skill in the field to which the present application belongs. The "first", "second", "third" and similar words used in the text of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationships may also change accordingly.
[0041] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application thereby. Identical components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An ultra-thin reading lens, characterized in that: The lens body comprises a lens main body, one side of the lens main body is a first spherical convex surface (1), the other side of the lens main body is provided with a second spherical concave surface (2), the lens main body is provided with a gradual concave surface (3) at the outer peripheral edge of the second spherical concave surface (2), and the gradual concave surface (3) is formed by connecting a plurality of adjustment arc surfaces (31); The cross section of the adjustment arc surface (31) is an adjustment arc line (311), the plane abutting against the outer peripheral edge of the lens body close to the second spherical concave surface (2) is an adjustment surface (4), the angle between the straight line coinciding with the two end points of the adjustment arc surface (31) and the adjustment surface (4) is an inclination angle, and the inclination angle corresponding to the adjustment arc surface (31) gradually decreases in a direction close to the center of the lens body.
2. The ultra-thin reading lens according to claim 1, characterized in that: The difference between adjacent inclination angles is 1°-2°.
3. The ultra-thin reading lens according to claim 1, characterized in that: The radii corresponding to the plurality of adjusting curved surfaces (31) are all the same.
4. The ultra-thin reading lens according to claim 1, characterized in that: The included angle corresponding to the first spherical convex surface (1) is 35°-40°.
5. The ultra-thin reading lens according to claim 4, characterized in that: The included angle corresponding to the first spherical convex surface (1) is 38°.
6. The ultra-thin reading lens according to claim 1, characterized in that: The diameter of the second spherical concave surface (2) is φ40mm-60mm.
7. The ultra-thin reading lens according to claim 5, characterized in that: The diameter of the second spherical concave surface (2) is φ50 mm.
8. The ultra-thin reading lens according to claim 1, characterized in that: The number of the plurality of adjusting cambered surfaces (31) is 8-13.