The best online opticians will state the level of Eyesight Max Review UV protection offered by all the sunglasses they offer. Generally, this is identified as protection to UV400. But what does this mean and is it the required level required to safely protect your eyes against exposure to the sun's different levels of radiation?
Aside from man made tools and products, the sun is the earth's primary source of Ultraviolet radiation (UV), which is divided into at least three different categories based on wavelength:
Wavelengths:
UVA - 320-400 nm
UVB - 280-320 nm
UVC - 100-280 nm
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