ATS-1R Pinlock ProtectTint - Sun Reactive Lens InsertThe Pinlock ProtecTINT lens automatically adjusts its tint in response to changes in light conditions. It darkens when exposed to bright sunlight and lightens when the light intensity decreases. The technology works accordingly. Photochromic molecules: The lens is made of a special type of lens material that contains photochromic molecules. These molecules have the ability to undergo a chemical reaction when exposed to ultraviolet (UV) light. As the