Photochromic Half Rim Myopia Prescription Sunglasses Prescription:-1.75 Brass(Gold)

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Photochromic Half Rim Myopia Prescription Sunglasses Prescription:-1.75 Brass(Gold)What are photochromic lenses? Photochromic lenses are also referred to as light sensitive lenses". Glass lenses are adding silver halide, but now is the mainstream of photochromic resin lenses, adding of spiro and other chemicals in the acrylic resin lens, so that the original colorless and transparent lenses, in bright light, will become colored lenses, to do the protection, so is suitable for indoor and outdoor use. Photochromic lens optical glass