Photochromic lenses are light sensitive. When exposed to Ultra Violet light they darken accordingly. The lenses are clear indoors and darken outdoors for greater comfort in the sun, and once you return indoor they revert to complete transparency.
Transitions Xtractive are new everyday adaptive lenses that go extra dark outdoors. They go extra dark in sunny conditions and also darken inside the car to offer superior visual comfort. Transitions Xtractive lenses bloock 100% of UV rays 100% of the time.
Transitions Xtractive lenses are ideal fo
r anyone spending an increased length of time outside or driving.