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photochromic lens

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pho·to·chro·mic lens (ft-krmk)
n.
A light-sensitive eyeglass lens that automatically darkens in sunlight and clears in reduced light.


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We developed Transitions, a photochromic lens that is clear indoors and turns sunglass-dark outdoors.
Spy's Delta Photochromic(TM) lenses have one of the widest transition ranges of any photochromic lens on the market and are made from NXT(R), a revolutionary innovation in unbreakable optical polymer technology.
Transitions Optical was the first company to successfully commercialize a plastic photochromic lens in 1990.
 
 
 
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