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The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn -producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public. The UV index is designed as an open-ended linear scale, directly proportional to the ...
Sunglasses of this type are sometimes called mirrorshades. A mirror coating does not get hot in sunlight and it prevents scattering of rays in the lens bulk. Sunglass lenses are made of either glass, plastic, or SR-91. Plastic lenses are typically made from acrylic, polycarbonate, CR-39 or polyurethane.
A relatively new rating designation for sun protective textiles and clothing is UPF (ultraviolet protection factor), which represents the ratio of sunburn-causing UV measured without and with the protection of the fabric. For example, a fabric rated UPF 30 means that, if 30 units of UV fall on the fabric, only 1 unit will pass through to the skin.
Plus, optometrists share their picks for the best sunglasses for eye protection. ... Retro Vintage Narrow Cat Eye Sunglasses. UV Protection: 100%.
Our editors have tested and found the 18 best aviator sunglasses that not only make a style statement but also provide the ultimate eye protection in the sun. The Best Aviator Sunglasses Any Guy ...
Goodr’s A Ginger’s Soul sunglasses have “Goodr” written on the arms of their sunglasses, so if you’re not a fan of sunglasses that show that off, you’d be better suited for the ...
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