Since 1980s when transition sunglasses came into being, they found favour with eyeglass wearers, especially among drivers. The lenses of transition sunglasses are able to change into different color according to the change of external environment. With them, the wearers have no need to put on and take off eyeglasses too often, which is fairly inconvenient. However, the exports want to remind customers that choosing transition sunglasses require great consideration, or eye health would be threatened.
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