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Lecheng Photochromic Lenses
Photochromic lenses are a type of eyeglass lens that darken when exposed to ultraviolet (UV) radiation and return to their clear state when the UV source is removed. The lenses contain photochromic molecules that undergo a chemical reaction when exposed to UV radiation, causing them to darken. The degree of darkening depends on the intensity of the UV radiation and some of photochromic molecules present in the lenses.
Photochromic lenses are ideal for people who spend a lot of time outdoors and want to avoid the hassle of switching between regular glasses and sunglasses . They provide protection against harmful UV radiation and glare from the sun.
