Lens, glasses and device for preventing and controlling myopia and lens preparation method

Abstract

The invention discloses a lens, glasses and device for preventing and controlling myopia and a lens preparation method. The lens is characterized in that the absolute value of the diopter of a lens body is smaller than the absolute value of the actual optometry diopter of the eyeballs of a myopia person, and a lightproof film is arranged on the surface of the central area of the lens body and provided with a plurality of micropores. Because the absolute value of the diopter of the lens body is smaller than the absolute value of the actual optometry diopter of the eyeballs of the myopic person,the lens body cannot completely correct the ametropia of the myopic person, and the permissible diffusion circle is located in front of the retina; after the central area is subjected to the action of the micropores, the allowable dispersion circle can move backwards, so that the allowable dispersion circle just falls into the central concave part of the macula lutea of the retina, clear centralvision is provided for the myopic person, and the allowable dispersion circle is still kept at a relatively front position due to the fact that the peripheral area of the lens body is not limited by the micropores. Therefore, myopia defocusing is formed on the peripheral retinas, and finally the effect of preventing and controlling juvenile myopia is achieved.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a lens for preventing and controlling myopia, glasses, a device and a lens preparation method. Background technique [0002] It is estimated that by 2050, more than 5 billion people in the world will be short-sighted, and myopia has become a global health crisis. There are a large number of young people with myopia in my country, and the rate of myopia ranks first in the world. Prevention and control of myopia has become a national strategy. For the prevention and control of juvenile myopia, we have been helpless for a long time. In recent years, researchers have gradually discovered some intervention methods, which have a certain effect on the prevention and control of myopia in young people. One of them is to wear some specially designed optical glasses. The design of these lenses is based on some laws discovered in recent years. [0003] Such as figure 1 As shown, accord...

AI Technical Summary

Problems solved by technology

However, the out-of-focus area of ​​the above-mentioned spectacle lens is usually distributed with hundreds of microlenses in the out-of-focus area outside the central visual area, and each micro-lens can provide the wearer with a myopic defocusing function. The manufacturing process of this micro-lens array is relatively cumbersome. , the technical difficulty is relatively high, which leads to the high market price of the product, making it difficult for most low-income families to afford

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