Aspheric myopia eyeglass

Abstract

The invention discloses an aspheric myopia eyeglass, comprising a back surface and a front surface. Curved surfaces of the back surface and the front surface are all aspheric even number aspheric refracting surfaces. The even number aspheric refracting surface is determined by a function as below; optimized variables are increased by times, so as to reach higher imaging quality and larger thinning amount. In addition, the even number aspheric refracting surface guarantees holosymmetry of the eyeglass and is beneficial for processing and manufacture; detection is same as a general spherical eyeglass, and measurement of degrees of eyeglass will not be influnced. The front surface and the back surface employ completely opposite aspheric design, so that various design errors and processing errors can compensate mutually. The eyeglass has excellent stability, and will not cause uncomfortableness to first time wearer due to various errors. Therefore, the aspheric myopia eyeglass has advantages of thin thickness, light weight, good imaging quality and facility for processing, etc.

Description

technical field [0001] The invention relates to an optical eyeglass lens, in particular to an aspheric myopia eyeglass lens. Background technique [0002] The back surface and the front surface of the traditional spectacle lens are arc, the disadvantages of the arc spectacle lens are: poor imaging clarity, the same specification of the lens is thicker than the aspheric lens, heavy and uncomfortable to wear; therefore aspheric myopia The concept of spectacle lenses has been proposed. Aspherical myopia lenses have the advantages of thin lenses, light weight, comfortable wearing, and good imaging quality, but their processing is very difficult, and different design schemes will also cause uneven imaging quality, such as The application number is 200810021635.4, and the publication number is CN101650462A, the invention patent "double-sided aspheric resin lens". The data is compared with the parameters of the spherical spectacle lens designed according to the same power (-4D) as...

AI Technical Summary

Problems solved by technology

[0002] The back surface and the front surface of the traditional spectacle lens are arc, the disadvantages of the arc spectacle lens are: poor imaging clarity, the same specification of the lens is thicker than the aspheric lens, heavy and uncomfortable to wear; therefore aspheric myopia The concept of spectacle lenses has been proposed. Aspherical myopia lenses have the advantages of thin lenses, light weight, comfortable wearing, and good imaging quality, but their processing is very difficult, and different design schemes will also cause uneven imaging quality, such as The application number is 200810021635.4, and the publication number is CN101650462A, the invention patent "double-sided aspheric resin lens". The data is compared with the parameters of the spherical spectacle lens designed according to the same power (-4D) as the spectacle lens of this embodiment, as shown in the table below:

[0006] First look at the image quality, from figure 1 and figure 2 It can be seen from the aberration curve diagram that the imaging quality of the double-sided aspheric resin lens provided by this technical solution is poor, and the specific performance is that the oblique astigmatism aberration is not as good as that of the spherical spectacle lens. For details, see meridian field curvature and sagittal field curvature. For numerical comparison, see the table below:

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