DESCRIPTION: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: comfort and style guaranteed. StandardsThis model complies with the European standards for non-prescription glasses (NF EN 14139) and with the international standards for prescription glasses (IS0 12870).