High-degree presbyopic lens

Abstract

The utility model relates to a pair of presbyopic lenses with different heights. The technical problem that an existing presbyopic lens is large in weight is solved. Comprising a lens body, the outer surface of the lens body is of an aspheric convex lens structure, the inner surface of the lens body is of a concave lens structure, the center of the lens body is provided with a convex-lens-shaped center view area, and the circumferential outer side of the center view area is sequentially provided with a transition area and a thinning area from inside to outside. The thickness of the thinning area is gradually reduced from the circumferential inner side close to the transition area to the circumferential outer side, and parabola smooth transition is adopted between the center view area and the transition area and between the center view area and the outer surface of the thinning area. The lens has the advantages that under the condition of ensuring the vision correction function, the bending of the peripheral area of the lens is greatly reduced on the outer surface of the lens, and the weight and the thickness of the lens are reduced. Meanwhile, through parabola girdling, smooth transition between a central visual area and a peripheral area is achieved, and the delicate lens appearance is presented; and meanwhile, the outer surface of the peripheral area of the lens is processed in a progressive curvature form, so that the weight of the lens is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to resin lens technical field, concretely relates to a high power presbyopic lens. BACKGROUND

[0002] Presbyopia is a normal physiological phenomenon, after 40 years old, with the gradual fibrosis of the human eye lens, ciliary muscle gradually paralyzes, the human eye cannot effectively adjust the shape of the eyeball axial change, only through adjusting the distance between the eye and the object, when looking at the near object must move far to see clearly, the eye state at this time is called presbyopia. Presbyopia wants to use visual acuity at the original habit distance, must wear presbyopic glasses to supplement visual acuity, can see near clearly again. After age, the originally matched presbyopic glasses degree is not enough, also needs to be replaced in time, otherwise will aggravate reading difficulty, produce dizziness and other symptoms, affect life and work, also can accelerate the process of presbyopia.

[0003] The surface curvature of the traditional presbyopic lens is large, especially the surface curvature of the high power presbyopic lens is larger. The outer surface of the traditional presbyopic lens adopts convex surface design, and the inner surface adopts concave surface design, and the cooperation of the inner and outer surfaces with different curvatures makes the lens present convex lens effect, so that the visual acuity is corrected. However, the lens with the above design has some defects, the spectacle lens surface of the finished product is relatively curved, the thickness is relatively thick, and the weight is relatively heavy. Taking a +10.00D presbyopic lens with a refractive index of 1.56 and a diameter of 65mm as an example, the lens center thickness reaches 10.7mm, and the lens weight reaches 24.1g before being fitted. The lens user wears a pair of thick and heavy glasses, which seriously affects the daily wearing experience. Long-term wearing of the glasses will compress the nerves and affect the eyes.

[0004] In order to solve the problems in the prior art, people have carried out long-term exploration and put forward various kinds of solutions. For example, the Chinese patent document discloses a kind of aspheric thinning presbyopic lens [202321826960.4], including optical center area lens and external area lens;The optical center area lens is spherical lens;The external area lens is aspheric lens;The external area lens is the lens with gradually reducing surface curvature.

[0005] The above scheme alleviates the problem of large curvature and thick thickness of the existing presbyopic lens to some extent, but the optical center area lens and the external area lens in the scheme lack transition, and cannot maximize the weight reduction. SUMMARY

[0006] The utility model aims at the above problem, provides a high power presbyopic lens.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme: A high power presbyopic lens, including lens body, the outer surface of lens body is non-spherical convex mirror structure and the inner surface adopts concave mirror structure, the centre of lens body has the central field of view area of convex lens, the circumferential outside of central field of view area is provided with transition area and thinning area gradually from inside to outside, and the thickness of thinning area gradually becomes small from the circumferential inside close to transition area to circumferential outside, the outer surface between central field of view area and transition area and thinning area adopts parabolic smooth transition.

[0008] In the high power presbyopic lens, the central field of view area is concentrically arranged with the central field of view area.

[0009] In the high power presbyopic lens, the diameter of the central field of view area is 20.0mm-50.0mm.

[0010] In the high power presbyopic lens, the thickness of the central field of view area is greater than the thickness of the circumferential outside, and the thickness of the circumferential inside of the transition area close to the central field of view area is greater than or equal to the thickness of the circumferential outside.

[0011] In the high power presbyopic lens, the dioptric power of the central field of view area is in the range of +8.00D to +28.00D.

[0012] In the high power presbyopic lens, the outer surface between the central field of view area and the transition area and the thinning area is processed by a ring cutting method fitted with a parabola.

[0013] In the high power presbyopic lens, the outer surface of the transition area and the thinning area is processed by a progressive curvature method.

[0014] In the high power presbyopic lens, the width of the thinning area is 8.0-18.0mm, and the thickness of the circumferential outside edge of the thinning area is 1.0-1.5mm.

[0015] In the high power presbyopic lens, the inner surface curvature of the transition area and the thinning area is the same as that of the central field of view area.

[0016] In the high power presbyopic lens, the change gradient of the outer surface of the thinning area from inside to outside is 0.15D of curvature per millimeter radius.

[0017] Compared with the prior art, the high-power presbyopic lens has the advantages that: the transition zone and the thinning zone are arranged from inside to outside outside the center visual field zone in a convex lens shape, the curvature of the lens peripheral zone is greatly reduced on the outer surface of the lens far from the eyeball, the lens weight reduction and thinning are realized, the smooth transition of the center visual zone and the peripheral zone is realized through the parabolic cutting, the exquisite lens appearance is presented, and the outer surface of the lens peripheral zone is processed in the form of progressive curvature, so that the lens realizes further weight reduction. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a structural schematic view of the utility model.

[0019] Fig. 2 is a structural schematic view of another perspective of the utility model.

[0020] In the drawing: lens body 1, center visual field zone 11, transition zone 12, thinning zone 13. DETAILED DESCRIPTION

[0021] The utility model will be further explained in detail in connection with the drawings and specific embodiments.

[0022] As Figs. 1-2 shown, a high-power presbyopic lens, a high-power presbyopic lens, including lens body 1, the outer surface of lens body 1 is non-spherical convex mirror structure and the inner surface adopts concave mirror structure, the center of lens body 1 has the center visual field zone 11 in a convex lens shape, the center visual field zone 11 circumferential outside is sequentially provided with transition zone 12 and thinning zone 13 from inside to outside, and the thickness of thinning zone 13 gradually becomes smaller from the circumferential inside close to transition zone 12 to circumferential outside, the outer surface between center visual field zone 11 and transition zone 12 and thinning zone 13 adopts parabolic smooth transition. The outer surface between center visual field zone 11 and transition zone 12 and thinning zone 13 here is processed by using the annular cutting mode of parabolic fitting implemented by using polynomial operation, and simultaneously, the outer surface of transition zone 12 and thinning zone 13 is processed in the form of progressive curvature.

[0023] The transition zone and the thinning zone are arranged from inside to outside outside the center visual field zone in a convex lens shape, the curvature of the lens peripheral zone is greatly reduced on the outer surface of the lens far from the eyeball, the lens weight reduction and thinning are realized. Simultaneously through parabolic cutting, the smooth transition of the center visual zone and the peripheral zone is realized, the exquisite lens appearance is presented;Meanwhile, the outer surface of the lens peripheral zone is processed in the form of progressive curvature, so that the lens realizes further weight reduction.

[0024] Preferably, the central vision zone 11 here is centered on the geometric center of the lens body 1, the transition zone 12 and the thinning zone 13 are both annular and are concentrically arranged with the central vision zone 11, the thickness of the central vision zone 11 is greater than the thickness of the circumferential outside, and the thickness of the circumferential outside of the transition zone 12 close to the circumferential inside of the central vision zone 11 is greater than or equal to the thickness of the circumferential outside.

[0025] The central vision zone 11 here has a diameter of 20.0-50.0mm, preferably 30.0-35.0mm. And the diopter range of the central vision zone 11 is +8.00D-+28.00D. The width of the thinning zone 13 is 8.0-18.0mm, preferably 10.0-16.0mm, and the thickness of the circumferential outside edge of the thinning zone 13 is 1.0-1.5mm.

[0026] Further, the inner surface curvature of the transition zone 12 and the thinning zone 13 here is the same as that of the central vision zone 11. The outer surface of the thinning zone 13 changes in the direction from the inside to the outside with a gradient of 0.15D of curvature per millimeter of radius. Specific embodiment one

[0028] A high-power presbyopic lens, the lens body 1 has a refractive index of 1.67 and a diameter of 65mm. The central vision zone 11 has a convex lens effect, which is a circular area with a diameter of 35mm and a diopter of +25.00D. The outer surface of the lens body 1 is designed as a non-spherical convex mirror, and the inner surface is designed as a concave mirror. The thinning zone 13 is an annular zone with a width of 10.0mm and an edge thickness of 1.1mm. Between the two is the transition zone 12. The inner surface curvature radii of the transition zone 12 and the thinning zone 13 are the same as those of the central vision zone 11, and the outer surfaces are respectively processed in the form of parabolic fitting annular cutting and progressive curvature. After processing, the central thickness of the lens is 4.38mm, and the weight of the lens is 6.4 grams. Specific embodiment two

[0030] A high-power presbyopic lens, the lens body 1 has a refractive index of 1.56 and a diameter of 65mm. The central vision zone 11 has a convex lens effect, which is a circular area with a diameter of 30.0mm and a diopter of +15.00D. The outer surface of the lens body 1 is designed as a non-spherical convex mirror, and the inner surface is designed as a concave mirror. The thinning zone 13 is an annular zone with a width of 15.0mm and an edge thickness of 1.0mm. Between the two is the transition zone 12. The inner surface curvature radii of the transition zone 12 and the thinning zone 13 are the same as those of the central vision zone 11, and the outer surfaces are respectively processed in the form of parabolic fitting annular cutting and progressive curvature. After processing, the central thickness of the lens is 5.02mm, and the weight of the lens is 7.12 grams.

[0031] Comparative example one

[0032] A highly presbyopic lens, in the form of a single-vision convex lens, with a refractive index of 1.56, a diameter of 65 mm, a power of +15.00 D, an aspherical convex outer surface and a concave inner surface. After processing, the lens has an edge thickness of 1.0 mm, a center thickness of 12.5 mm and a weight of 28.3 g.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0034] Although the terms lens body 1, central vision zone 11, transition zone 12, thinning zone 13, etc. are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely to facilitate the description and explanation of the essence of the present application; any interpretation of them as an additional limitation is contrary to the spirit of the present application.

Claims

1. A highly progressive presbyopic lens comprising a lens body (1), characterized in that, The outer surface of the lens body (1) is a non-spherical convex mirror structure, and the inner surface is a concave mirror structure, the center of the lens body (1) has a central visual field area (11) in the form of a convex lens, the circumferential outer side of the central visual field area (11) is sequentially provided with a transition area (12) and a thinning area (13) from inside to outside, and the thickness of the thinning area (13) gradually decreases from the circumferential inner side close to the transition area (12) to the circumferential outer side, and the outer surface between the central visual field area (11) and the transition area (12) and the thinning area (13) is smoothly transitioned by a parabola.

2. A highly progressive multifocal lens according to claim 1, wherein, The central visual field area (11) is centered on the geometric center of the lens body (1), the transition area (12) and the thinning area (13) are annular and concentrically distributed with the central visual field area (11).

3. The highly progressive multifocal lens of claim 1, wherein, The diameter of the central visual field area (11) is 20.0mm-50.0mm.

4. The highly progressive multifocal lens of claim 1, wherein, The thickness of the central visual field area (11) is greater than that of the circumferential outer side, and the thickness of the circumferential inner side of the transition area (12) close to the central visual field area (11) is greater than or equal to that of the circumferential outer side.

5. The highly progressive multifocal lens of claim 1, wherein, The diopter range of the central visual field area (11) is +8.00D-+28.00D.

6. A highly progressive multifocal lens according to claim 1, wherein, The outer surface between the central visual field area (11) and the transition area (12) and the thinning area (13) is processed in an annular cutting manner fitted with a parabola.

7. The highly progressive multifocal lens of claim 1, wherein, The outer surface of the transition area (12) and the thinning area (13) is processed in a progressive curvature manner.

8. The highly progressive multifocal lens of claim 1, wherein, The width of the thinning area (13) is 8.0-18.0mm, and the thickness of the circumferential outer edge of the thinning area (13) is 1.0-1.5mm.

9. The highly progressive multifocal lens of claim 1, wherein, The inner surface curvature of the transition area (12) and the thinning area (13) is the same as that of the central visual field area (11).

10. The highly progressive multifocal lens of claim 1, wherein, The change gradient of the outer surface of the thinning area (13) from inside to outside is 0.15D of curvature per millimeter of radius.

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