Photochromic lens is a lens that becomes dark when exposed to a certain wavelength of light (usually ultraviolet light).When it is no longer illuminated by this light source, it will return to its original light transmittance and become clear. no chromatic aberration, restore true colors, and bring you a good visual experience.
High Quality Material: Lightweight TR90 Full Frame , Nice snug fit, Sturdy and Durable, and are Comfortable to Wear