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Sunglasses

Posted by Auhashop 7 on Apr 19, 2017

Sunglasses Sunglasses or sun glasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are colored, polarized or darkened. In the early 20th century, they were also known as sun cheaters (cheaters being an American slang term for glasses).[1] The American Optometric Association recommends sunglasses whenever a person is in the sun.[2] to protect the eyes from ultraviolet radiation (UV) and blue light, which can cause several serious...