Photochromic Reading glasses
Lenses are clear when indoors or at night and automatically darken to a sunglasses tint when exposed to UV sunlight.
Lenses will begin to clear as soon as they are away from UV sunlight, and will be noticeably lighter and mostly clear within a few minutes.
They absorb UV radiation that can otherwise damage your eyes.
They are an excellent solution for people who hate constantly switching between their reading glasses and their shades.
