What is the UV index of sunglasses?

u003cbru003eUV index: For glasses.com/sunglasses-1.html' target='_blank'>sunglasses, the UV index is to filter out the effect of ultraviolet rays, which should eliminate the 280-400nm light. At present, the UV index of most sunglasses is between 96% and 98%, and dark lenses are better than light lenses. Anta AT8002C1 black sunglasses account for 5% of the sun's rays on the surface of the earth as ultraviolet rays. Ultraviolet rays are harmful to human skin and eyes. Among them, UV-B ultraviolet rays with a wavelength between 280 and 320 microns can cause keratitis and skin cancer, and UV-C ultraviolet rays with a wavelength between 320 and 380 can make people vulnerable to cataracts and retinal burns. Sunglasses with the UV-400 logo show that they can filter out harmful light within a wavelength of 400 microns, and can block more than 98% of the ultraviolet rays from the human eyes, so they have a better protective effect. The amount of blocking light depends on the color of the lens. The darker the color, the more light is blocked. UV blocking is when the processed lens is in a liquid state by adding UV-absorbing raw materials to block UV. Normal sunglasses are generally 100 % UV protection means UV400. Ordinary optical resin lenses are generally UV-resistant 360-380, unless otherwise specified, they are protected against UV400. Related Reading: Sunglasses Polarized Sunglasses

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