Glasses lens for preventing or relieving myopia through inclined grating and preparation method thereof

Abstract

The invention discloses a glasses lens for preventing or relieving myopia through an inclined grating and a preparation method thereof. The glasses lens comprises a lens substrate and a high anti-reflection film layer, and the high anti-reflection film layer comprises a plurality of high-refractive-index coating film layers and a plurality of low-refractive-index coating film layers which are formed on the surface of one side of the lens substrate and alternately stacked; and a periodic spatial modulation inclined rectangular grating film layer is formed on the high antireflection film layer by matching a mask technology with a constant gradient gradual change defocusing principle of a multi-ring concentric circle inclined rectangular grating. The lens better fits the radian of myopia retina in eyeball development, the larger the myopia defocus deceleration signal area is, the more obvious the reduction of eye axis growth is, the effect of preventing or reducing myopia is achieved, clear correction is ensured, meanwhile, myopia development is effectively reduced, the longer the wearing time is, the better the myopia control effect is, asymmetric defocus around retina of myopia can be corrected, ensemble regulation disorder of eyes can be corrected, and the glasses lens is suitable for mass production and low in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of lenses, in particular to a spectacle lens for preventing or slowing down myopia with an inclined grating and a preparation method thereof. Background technique [0002] In recent years, the myopia rate of high school students and college students in my country has exceeded 70% and is increasing year by year, and the myopia rate of primary school students is also close to 40%. This is a very terrible social reality, and it is urgent to prevent myopia. [0003] The eyeball controls its growth and refractive development through visual feedback signals. Defocus is an important visual feedback signal that can change the way the eyeball grows. In recent years, a large number of clinical animal model studies have also shown that peripheral defocus plays a very important role in the occurrence and development of myopia. [0004] At present, the basic principle of the products of equal gradient defocus lenses o...

AI Technical Summary

Problems solved by technology

[0006] 1. The surface of the master mold designed and produced must be finely processed with ultra-micro-concave arrays, and very expensive ultra-precision processing equipment must be used to make micro-concave nano-arrays on the master mold, and the fineness and stability are not good.

[0007] 2. The precision of the ultra-micro-concave array on the designed and manufactured master mold is gradually in the process of multiple injection molding, because the process must go through special process parameters such as high temperature, high pressure, and high speed, resulting in micro-concave points on the master mold. The array is easy to wear and damage, which leads to poorer precision and irregular service life, which makes it necessary to control the life of the master mold and open new molds for frequent replacement, and the cost is very expensive, making the cost extremely high

[0008] 3. The designed microconvex lens array is prone to crosstalk between viewpoints

[0009] 4. The designed ultra-convex lens array is prone to stray light and abnormal dispersion, resulting in color distortion of the field of view

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