Transitions® Lenses - Photochromic Glasses That Turn Into Sunglasses
Luxury store to buy your transition lenses in NY | OPTYX Home
EO-Executive Optical - “Photochromic lenses or transition lenses are eyeglass lenses that darken automatically when exposed to sunlight, then fade back when you return indoors.” Source: http://www.allaboutvision.com/ lenses/photochromic.htm | Facebook