Blue light blocking lenses with an ISO standard blue light blocking rate of 20% or higher are recommended for everyday use when using LED digital display devices such as TVs, computers, tablets, and mobile phones. Blue light blocking lenses with an ISO standard blue light blocking rate of 40% or higher are even more recommended for people who spend more than 8 hours a day looking at screens. Because blue light blocking glasses filter some blue light, the screen may appear yellowish. It is recommended to wear two pairs: one pair of regular glasses for everyday use, and one pair of blue light blocking glasses with a blue light blocking rate of 40% or higher for use with computers and other LED digital display products. Plano (non-prescription) blue light blocking glasses are popular among non-myopic users, specifically designed for computer work, and are gradually becoming a fashion trend.
