Photochromic lenses are lenses that darken on exposure to UV radiation. It's a good choice in hot summers. Now we offer plastic 1.56 photochromic lenses in 7 different colors (brown, grey, green, orange, pink, purple and blue), as well as tranditional mineral PBX^® PGX^® lenses from Corning^®1blanks.

Because photochromic compounds fade back to their clear state by a thermal process, the higher the temperature, the less dark photochromic lenses will be. This thermal effect is called "temperature dependency" and prevents these devices from achieving true sunglass darkness in very hot weather². Our plastic photochromic lens are designed to eliminate this thermal effect to min. Meanwhile, they have faster fading speed than old products.

To learn details, please click Photochromic1.56.

1 PBX, PGX and Corning are trade marks of Corning Incorporated.

2 quoted from Wikipedia