PHOTOCHROMIC MOLECULES MAKE LIGHT, DARK, AND EVERY SHADE IN BETWEEN POSSIBLE
When Transitions® lenses are exposed to UV light, trillions of photochromic molecules in the lens begin to change structure. This reaction is what causes the lenses to darken.

All lenses that adapt to light use photochromic molecules; the superiority of Transitions brand technology lies in our exclusive, patented formulas. Each formula is integrated into the surface of the lens. These molecules constantly and smoothly recalibrate so the optimal amount of light reaches your eyes whether you’re in bright sunlight, under cloud cover or indoors.