Lens

Abstract

The invention discloses a lens. The lens is a spectacle lens for people to wear. The treatment process for changing the transmission spectrum of the spectacle lens is one or a combination of plating of an antireflection film, plating of an antireflection film and dyeing of a lens material, the antireflection spectrum wavelength of the antireflection film is 440 nm-600 nm, the reflection spectrum of the antireflection film has a band of larger than 500 nm and / or smaller than 440 nm, and the absorption spectrum of the spectacle lens after the lens material dyeing process has a band of larger than 500 nm and / or smaller than 440 nm. The lens in the scheme can effectively prevent myopia, delay development of myopia and reduce damage of light to the retinae.

Description

technical field [0001] The invention relates to the field of vision protection, in particular to a lens. Background technique [0002] Glasses are a necessity in people's daily life. They are often used to improve the eyesight of myopic people and protect them from light, wind or dust. Its study and life bring a lot of inconvenience, researchers try to improve the current situation of myopia crowd by changing the lens structure, but the effect is limited. Myopia is the most common type of refractive error and has become a global health problem. Over the past half century, the incidence of myopia has increased significantly around the world, and it is estimated that the number of myopia will reach 1 / 3 of the world's population. At the same time, high myopia can cause problems such as peripapillary sclera and choroid thinning, eye deformation, retinal atrophy, and even early visual impairment and loss. [0003] In recent years, studies have shown that increasing outdoor act...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the transmitted light of spectacle lenses is mostly natural light or reduced blue light, which has no preventive effect on myopia

Images