Blue light multifocal readers help filter the potentially harmful blue light* emitted from digital devices, and other artificial and natural sources, including the sun. These reading glasses have multifocal lenses to help you see clearly at three different distances: reading, computer use, and interacting with others.
*Filters at least 30% of blue-violet light. The percentage refers to the average amount of blue-violet light (between 400-455nm as stated by ISO TR 20772:2018) filtered as measured in 5 nm increments. Covered under U.S. Pat. No. 8,360,574. Other U.S. and foreign patents pending.