Health lens for preventing blue light harm and its mfg. method

Abstract

The spectacle lens is composed of basal piece and films coated by vaporization. The basal piece is made from organic high polymer containing absorbent for visible light in shortwave. Films coated by vaporization are prepared at least one film in low refractive index and at least one film in high refractive index alternate superimposed. The method includes cleaning, impregnating, coating by vaporization and solidifying steps etc. the invented spectacle lens filters out ultraviolet radiation, most of visual purple and part of blue light (wavelengths in 380-450nm). Thus, people can see objects sharply in weak light or stronger light environment.

Description

technical field [0001] The invention relates to glasses and a manufacturing method thereof. More specifically, the present invention relates to a kind of anti-blue light damage health care spectacle lens and its manufacturing method. Background technique [0002] In order to accurately describe the content of the present invention, the following terms are explained or defined first. [0003] Ultraviolet light: refers to light with a wavelength of 200-380nm. It is divided into far ultraviolet (200~315nm) and near ultraviolet (315~380nm). [0004] Visible light, short-wave visible light and long-wave visible light: the wavelength range of visible light is 380-780nm. Among them, the wavelength range of purple light is 380-430nm, the wavelength of blue light is 430-470nm, and the peak of pure blue light is at 470nm. The wavelength of violet light is the shortest wave in the visible light region, and its frequency is the highest, followed by blue light, so the light with a wa...

AI Technical Summary

Problems solved by technology

[0010] Medical research also shows that in the visible light region, human eyes are not sensitive to violet light and part of blue light with a wavelength of 380nm to 450nm, and are not sensitive to visual objects and color discrimination, that is, the eyes can distinguish the color of violet light and part of blue light in this band. The ability is limited, but the photon energy level of this wave band is relatively high (because of the short wavelength), and the damage to the retina of the eye is relatively large; Strong, so people will feel a strong tingling sensation in the eyes; they also have this feeling under strong light, so people have to squint their eyes and forcefully narrow the pupils in this environment to reduce the impact of the above-mentioned ultraviolet light and short-wave light. Irritation; if people work in this environment for a long time, it is very easy to cause eye diseases such as cataracts, color blindness and age-related macular degeneration; in order to protect eyes, people often wear colored sunglasses when working under strong light in summer or in snow. Avoid the stimulation of the above-mentioned light; but at present, this kind of sunglasses does not have selective light shielding, so while shielding ultraviolet light, it also shields visible light of all wavelengths; so wearing this kind of ordinary sunglasses has a low color discrimination ability

Especially in cloudy or low-light environments, the visual and color recognition performance is even worse

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