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There are five options to improve our knowledge about lenses.
1. Hard Coating
Photochromic lenses are sensitive to UV light, which
makes them darker in outdoors & lighter in indoors.
Photochromic lenses absorb 100% UV rays, thus giving complete protection against cancer causing, harmful UV radiations.
Daynite and Qshade, are breakthrough photochromic products, developed specially for the Indian conditions , offering similar performances to MNCs products, at less than half the price.