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sun shades or sun glasses are a form of defensive eyewear designed generally to prevent shiny sunlight and excessive-power visible mild from unfavorable or discomforting the eyes. they can once in a while additionally function as a visual aid, as variously termed spectacles or glasses exist, offering lenses which are colored, polarized or darkened. inside the early 20th century, they had been additionally referred to as solar cheaters.
the yank optometric association recommends sunglasses on every occasion a person is in the solar to guard the eyes from ultraviolet radiation (uv) and blue mild, that may purpose several serious eye issues. its usage is obligatory straight away after a few surgical procedures, including lasik, and recommended for a certain term in dusty areas, while leaving the house and in the front of a television display or computer screen after lasek. sun shades have lengthy been related to celebrities and movie actors basically from a desire to masks their identity.for the reason that Nineteen Forties, sunglasses have been famous as a style accessory, specially at the beach.