Blue light screen glasses for adults in tortoise izipizi color. All "led screens" (smartphones, tablets, computer screens, television) emit "blue light", which is particularly harmful to the eyes.screen glasses filter out 40% of the blue light emitted by screens, thus reducing eye fatigue, eye irritation and headaches. This feature is achieved by a treatment that makes the lenses slightly yellow whilst not agumenting the visability of true colours. Rubber touch, flex temples, designer frame: This blue light is as dangerous as uv light and can cause, in the short term, migraines and eye pain; in the long term, it can cause irreversible damage to your eyesight (cataracts or macular degeneration). No graduation. Includes felt case to store the glasses. Rubber feel, flexible temples and designer frame: comfort and style guaranteed. Stay connected with complete security. This model complies with european standards for pre-mounted glasses (nf en 14139) and international standards for