Cyxus Blue Light Filter [Better Sleep] Block UV Computer Glasses, Anti Eye Fatigue Blocking Headaches Eye Strain, Reading Eyewear, Great for Phone Readers 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.