Ultrathin optical myopia eccentric lens

Abstract

The utility model discloses an ultrathin optical myopia eccentric lens, the spherical center of the convex surface and the spherical center of the concave surface are mutually staggered, the spherical center of the convex surface is located at the geometric center, the spherical center of the concave surface deviates from the geometric center in the horizontal direction, and the eccentric distance is 2-8mm. The eccentric lens is provided with the aspherical lens, distortion is greatly reduced, the visual definition and accuracy are improved, particularly, the high-degree myopic lens is arranged at the edge, the eccentric lens is clearer than a traditional lens, the edge thickness of the cut lens is thinner, the weight of the glasses is lighter, the glasses are more comfortable to wear, and the oppression feeling cannot be brought to eyes; the lens is more attractive and fashionable in appearance, can be suitable for preparing optical myopic glasses with various degrees, is particularly suitable for myopic people with high degrees, enlarges the applicable diameter of the myopic lenses, and can meet the requirements of people with small interpupillary distance or strabismus patients for wearing large glasses frames.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to the structure of an ultra-thin optical myopia eccentric lens. Background Art

[0002] Traditional optical myopia lenses, usually Figure 1-Figure 3 As shown, the spherical centers O1 / O2 of the convex and concave surfaces coincide. Such a double spherical lens is used in optical myopia glasses. The edge of the lens itself is relatively thick. As the degree increases, the thickness of the edge becomes more prominent, which not only causes the line of sight distortion at the edge of the lens, directly affecting the clarity and accuracy of the peripheral vision, but also increases the weight of the glasses, making them uncomfortable to wear, causing a sense of oppression to the eyes, and making the appearance of the glasses unsightly. Moreover, the optical center of such a double spherical lens is located at the geometric center. For people with a small pupil distance or strabismus, it may not be possible to cut a lens with a large enough diameter to install it on a large frame, resulting in the failure to meet the needs of people with a small pupil distance or strabismus to wear a large frame. Utility Model Content

[0003] The utility model aims to provide an ultra-thin optical myopia eccentric lens, which can be used to prepare optical myopia glasses of various degrees and meet the needs of people with small pupil distance or strabismus patients to wear large frames.

[0004] In order to achieve the above purpose, the solution of the utility model is:

[0005] An ultra-thin optical myopia eccentric lens, the spherical centers of the convex surface and the concave surface of which are staggered with each other, the spherical center of the convex surface is located at the geometric center, the spherical center of the concave surface deviates from the geometric center in the horizontal direction, and the eccentric distance is 2-8mm.

[0006] The minimum thickness of the lens is 1.30 mm ± 0.05 mm.

[0007] The diameter D of the lens is 62.0 mm±0.05 mm.

[0008] The myopia degree of the lens is 200 degrees, the convex curvature C is 1.25, the convex spherical radius R1 is 418.40 mm±0.05 mm, and the concave spherical radius R2 is 172.35 mm±0.05 mm.

[0009] The myopia degree of the lens is 300 degrees, the convex curvature C is 1.25, the convex spherical radius R1 is 418.40 mm±0.05 mm, and the concave spherical radius R2 is 133.18 mm±0.05 mm.

[0010] The myopia degree of the lens is 400 degrees, the convex curvature C is 1.25, the convex spherical radius R1 is 418.40 mm±0.05 mm, and the concave spherical radius R2 is 108.51 mm±0.05 mm.

[0011] After adopting the above scheme, the utility model makes the spherical center of the convex surface and the concave surface staggered, so that the spherical center of the concave surface deviates from the geometric center. Such an eccentric lens not only has the design of an aspherical lens, but can also greatly reduce distortion and improve visual clarity and accuracy. Especially at the edge of a high-degree myopia lens, the eccentric lens is clearer than a traditional lens, and the edge thickness of the cut and formed lens is thinner. The glasses are lighter and more comfortable to wear, and will not bring a sense of oppression to the eyes. The appearance is also more beautiful and fashionable. Moreover, such an eccentric lens also moves the optical center, expands the applicable diameter of the myopia lens, realizes the replacement of a large lens with a small lens, saves materials, and allows people with small pupil distance and strabismus to wear a relatively large frame.

[0012] In summary, the eccentric design of the utility model enables the optical myopia eccentric lens to be suitable for preparing optical myopia glasses of various degrees, especially for people with high myopia, and can effectively reduce the distortion and blurred vision caused by high myopia. At the same time, the utility model can meet the needs of people with small pupil distance or strabismus patients to wear large frames. The utility model can be applied to high-curved glasses, large-diameter glasses and prism compensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a stereogram of the structure of the lens in the prior art;

[0014] Figure 2 yes Figure 1 A front view of

[0015] Figure 3 yes Figure 1 A cross-sectional view of

[0016] Figure 4 It is a three-dimensional diagram of the structure of the utility model;

[0017] Figure 5 yes Figure 4 A front view of

[0018] Figure 6 yes Figure 4 A cross-sectional view of an embodiment of a minimum eccentric distance;

[0019] Figure 7 yes Figure 4 A cross-sectional view of an embodiment of the maximum eccentric distance;

[0020] Figure 8 yes Figure 4 Comparison diagram of various eccentric distance embodiments.

[0021] Description of symbols

[0022] Convex surface 1, spherical center O1, spherical radius R1;

[0023] Concave surface 2, spherical center O2, spherical radius R2;

[0024] Eccentric distance d, diameter D, minimum thickness h. DETAILED DESCRIPTION

[0025] The following is a detailed description of the implementation of the utility model in conjunction with specific embodiments and drawings. People familiar with this technology can easily understand other advantages and effects of the utility model from the contents disclosed in the specification. The structure, proportion, size, etc. illustrated in the drawings are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the limiting conditions for the implementation of the utility model and have no technical substantive significance. Any structural modification, proportional relationship change or size adjustment should still fall within the scope of the content of the utility model without affecting the effects and purposes that can be achieved by the utility model. The terms such as "one", "two", "on" and the like quoted in this specification are also only for the convenience of understanding, and are not used to limit the scope of the implementation of the utility model. The changes or adjustments in their relative relationships are also regarded as the scope of the implementation of the utility model without substantial changes in the technical content.

[0026] like Figures 4 to 8 As shown, the utility model discloses an ultra-thin optical myopia eccentric lens, wherein the spherical centers O1 / O2 of the convex surface 1 and the concave surface 2 are staggered with each other, the spherical center O1 of the convex surface 1 is located at the geometric center, the spherical center O2 of the concave surface 2 deviates from the geometric center in the horizontal direction, and the eccentric distance d is 2-8mm.

[0027] The optimal diameter D of the lens is 62.0 mm ± 0.05 mm, and the minimum thickness h of the lens is 1.30 mm ± 0.05 mm.

[0028] The relationship between the various parameters of the lens, taking PC lens as an example, if the refractive index of the PC lens is 1.586, the refractive index of the glass lens is 1.523, the myopia degree is -X, the curvature of convex surface 1 is C, the spherical radius of convex surface 1 is R1=523 / C, and the spherical radius of concave surface 2 is R2=586 / (586 / R1+X / 100).

[0029] Specifically, the myopia degree of the lens is -400, the curvature C of the convex surface 1 is 1.25, the spherical radius R1 of the convex surface 1 is 523 / 1.25=418.40mm, and the spherical radius R2 of the concave surface 2 is 586 / (586 / 418.40+400 / 100)=108.51mm. Similarly, it can be obtained that the myopia degree of the lens is 200 degrees, the curvature C of the convex surface 1 is 1.25, the spherical radius R1 of the convex surface 1 is 418.40mm, and the spherical radius R2 of the concave surface 2 is 172.35mm. The myopia degree of the lens is 300 degrees, the curvature C of the convex surface 1 is 1.25, the spherical radius R1 of the convex surface 1 is 418.40mm, and the spherical radius R2 of the concave surface 2 is 133.18mm. The tolerance of the spherical radius R1 of the convex surface 1 and the spherical radius R2 of the concave surface 2 is ±0.05mm.

[0030] The utility model staggers the spherical centers O1 / O2 of the convex surface 1 and the concave surface 2, so that the spherical center O2 of the concave surface 2 deviates from the geometric center (i.e., deviates from the spherical center O1). Therefore, the utility model has the following advantages:

[0031] 1. Higher visual clarity: Due to the eccentric structural design, the lens of the utility model has the design characteristics of an aspherical lens, which can greatly reduce distortion and improve visual clarity and accuracy, especially at the edge of the lens. The eccentric lens is clearer than the traditional lens.

[0032] 2. The glasses are light in weight: Compared with traditional spherical lenses, especially when the degree is high, the edge thickness of the cut and formed lenses is thinner, the glasses are lighter in weight, more comfortable to wear, will not bring a sense of pressure to the eyes, and achieve an ultra-thin effect.

[0033] 3. More beautiful appearance: The eccentric lens design of the utility model can make the lens thinner, making the appearance of the glasses more beautiful and fashionable.

[0034] 4. Suitable for people with high degrees: The eccentric lens design of the utility model is suitable for people with high degrees, and can effectively reduce the distortion and blurred vision caused by high degrees.

[0035] 5. Expand the applicable diameter of the lens: The eccentric lens design of the utility model offsets the optical center during production, making the applicable diameter of the lens larger, realizing the use of small lenses instead of large ones, saving materials, and allowing people with small pupil distance and strabismus to wear larger frames. Otherwise, if the optical center is not offset, the diameter of the lens is not large enough and the lens cannot be placed on the frame.

[0036] The above embodiments are only used to illustrate the principle and effect of the present invention, and are not intended to limit the present invention. Even so, anyone familiar with the art can modify the above embodiments without violating the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be as listed in the scope of the patent application.

Claims

1. An ultra-thin optical myopia eccentric lens, characterized in that: The spherical centers of the convex surface and the concave surface are staggered with each other. The spherical center of the convex surface is located at the geometric center, and the spherical center of the concave surface deviates from the geometric center in the horizontal direction, and the eccentricity distance is 2-8 mm.

2. The ultra-thin optical myopia eccentric lens according to claim 1, characterized in that: The minimum thickness of the lens is 1.30 mm ± 0.05 mm.

3. The ultra-thin optical myopia eccentric lens according to claim 1, characterized in that: The diameter D of the lens is 62.0 mm±0.05 mm.

4. The ultra-thin optical myopia eccentric lens according to claim 1, characterized in that: The lens is a PC lens with a myopia degree of 200 degrees, a convex curvature C of 1.25, a convex spherical radius R1 of 418.40 mm±0.05 mm, and a concave spherical radius R2 of 172.35 mm±0.05 mm.

5. The ultra-thin optical myopia eccentric lens according to claim 1, characterized in that: The lens is a PC lens with a myopia degree of 300 degrees, a convex curvature C of 1.25, a convex spherical radius R1 of 418.40 mm±0.05 mm, and a concave spherical radius R2 of 133.18 mm±0.05 mm.

6. The ultra-thin optical myopia eccentric lens according to claim 1, characterized in that: The lens is a PC lens with a myopia degree of 400 degrees, a convex curvature C of 1.25, a convex spherical radius R1 of 418.40 mm±0.05 mm, and a concave spherical radius R2 of 108.51 mm±0.05 mm.

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