Cyxus Blue Light Filter [Anti Eye Strain] Radiation Designer Reading Glasses, Better Sleeping Block UV Safety Classic Plastic Yellow Lens, Unisex(Mens/Womens) Computer Eyewear (Black Frame) Plastic ANTI BLUE LIGHT--Anti harmful blue ray, provide all-day protection, against the detrimental effect high energy visible blue light and UV400. REDUCE EYESTRAIN--Enjoy your digital time, NO worry about eye fatigue, blurred vision and headache. SLEEP BETTER--Better sleep for you, blue blocker for your eyes and guardian for your health. LIFETIME WARRANTY--We provide worry-free lifetime warranty(no man-made)and friendly customer service. GROBAL BRAND--Cyxus is an FDA REGISTERED COMPANY, people from across the world all choose Cyxus.