Photochromic Contact Lenses: What They Do and Do Not
Contact lenses that darken in sunlight exist and they work — just not the way most people assume. They reduce glare rather than eliminating it, they do not replace sunglasses, and inside a car they barely activate at all. How they work The material carries photochromic molecules that change shape when they absorb ultraviolet light….
Dr. Teresita Bollar, OD