PHOTOCHROMIC LENSES

Photochromic lenses automatically darken to a sunglass shade outside when exposed to sunlight and then quickly return to a clear state indoors. These lenses also provide 100% protection from the sun’s UV rays and are available in a wide variety of lens materials and designs, including bifocal and varifocal lenses.

The amount of darkening that most photochromic lenses undergo depends on how much UV radiation they are exposed to. As a general rule, these lenses won’t get as dark behind the windscreen of your car because the windscreen blocks out much of the sun’s UV rays that cause the lenses to change colour.