What are photochromic lenses? Do you carry Transitions?

Photochromic lenses are specially treated to turn dark when exposed to UV light. When the lenses are out of the sunlight, they become clear again. 

We carry photochromic lenses for 1.57, 1.61, 1.61(pro), 1.67 and 1.71 lenses for single-vision glasses. And 1.57, 1.61, and 1.67 lenses for progressive glasses.