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: Did you know that on average each person spends 50 hours a week in front of a screen (mobile phone, computer, tablets, television...)? 50H! That's more than two full days each week in front of a screen. Well, all of these screens are equipped with the latest generation of "led blacklighting" and emit hev (high energy visible) light, which is also known as blue light. No graduation. Includes felt case to store the glasses. Rubber feel, flexible temples and designer frame: comfort and style guara