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Light Intelligent Photochromic Lens
Photochromic lenses are eyeglass lenses that are clear (or nearly clear) indoors and darken automatically when exposed to sunlight. Other terms sometimes used for photochromic lenses include “light-adaptive lenses,” “light intelligent” and “variable tint lenses.” Anyone who wears glasses knows what a hassle it can be to have to carry around separate prescription sunglasses when you are outside. With photochromic lenses people can easily adapt to the transit...