Transitions® lenses have always filtered blue light indoors because the photochromic molecules in the un-activated indoor state still absorb some light without compromising indoor vision clarity. Because we have control over the structure of the photochromic molecules we can provide the benefit of blue light filtering while the lenses are still seen as clear. 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 the Transitions brand technology lies in our exclusive, patented formulas.
Each formula is integrated into the surface of the lens. These molecules constantly and smoothly re-calibrate so the optimal amount of light reaches your patient's eyes whether they’re in bright sunlight, under cloud cover or indoors. Transitions lenses are equipped with patented, photochromic dyes that enable the lenses to rapidly darken, when they are exposed to ultraviolet light. The greater the intensity of UV rays, the darker the lenses become. When UV light is no longer present (indoors or at night) the lenses fade back to their original state.