紫外線の量によって色が変化するTransitions Lenses

Lens color changes according to the amount of UV light. Transitions lenses get darker when exposed to more UV light while the color becomes lighter when there is less UV light. This unique property allows Transitions lenses to be used as both regular glasses and sunglasses. Do note that the lenses get clearer more slowly compared to when they get darker. The color change is caused by the intensity of UV light and not the brightness of the surrounding.