Fit-Over Glasses - Blue Blocking Nighttime Eye WearFITS OVER PRESCRIPTION GLASSES They fit over a wide variety of Rx and reading glasses. They can also be worn by themselves. EASY TO USE Easily swap them back and forth between different glasses. No clips or fasteners. BRIGHT & CLEAR LENSES These are designed to pass as much non blue light through as possible. There is no dark tint and they are not polarized. You can still make eye contact with loved ones and even forget you are wearing them. TECHNICAL