Anti-Blu-ray glasses are suitable for wearing LED digital display devices such as TVs, computers, PADs and mobile phones. However, it is not recommended to wear anti-Blu-ray glasses for a long time in daily life,
The anti-blue light glasses can effectively reduce the continuous damage of the blue light to the eyes. By using the portable spectrum analyzer for comparison and detection, after using the anti-blue light glasses,
As early as 1966, Nell et al. found that exposure to blue light can cause damage to retinal cells, leading to decreased or even lost vision. Among them, short-wave blue light with a wavelength between 400-450 nm has the greatest damage to the retina.
Blu-ray is part of natural visible light, and both daylight and electronic screens emit blue light. Blue light is an important part of visible light. There is no single white light in nature. Blue light is mixed with green light and red light to produce white light.
Correct vision with lenses, prisms, contact lenses, intraocular lenses, etc., to eliminate visual fatigue, protect or treat the eyes. There are many kinds of glasses, and those who correct refractive errors have optical glasses and contact glasses.
In the summer, fishing friends like to wear polarized glasses. Why? The reason is very simple. Polarized sunglasses have the function of filtering polarized light. Wear it for fishing. It is easier to watch and the eyes are not tired. If the lens is dark (such as brown, green, etc.)
Generally, sunglasses only use the effect of dimming, because the general lens can not filter the light, so it can only reduce the intensity of glare, ultraviolet light, etc., and can not completely block these harmful rays,
The meaning of the UV standard means that the human eye perceives the light range from 380 to 780 nm (ie, visible light), and the ultraviolet light refers to light with a wavelength below 380 nm (invisible light).
Polarized sunglasses block unpleasant glare and protect your eyes from UV rays. All of this is due to the metal powder filter, which "selects" the light as it enters. Polarized sunglasses selectively absorb some of the wavelength bands that make up the sun's rays because they rely on very fine metal powders (iron, copper, nickel, etc.).
In life, there are too many light sources to produce harmful light, especially sunlight; the light emitted from the sun is visible light, infrared light, ultraviolet light (Ultraviolet) and so on. In the case of ultraviolet rays on the human skin, eyes, etc.
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