?100% NO RISK AFTER SALE?: in case of any question or problem, please contact the seller without any hesitation to solve until satisfaction. We provide 100% no risk, worry-free after sale service for all K KENZHOU glasses. You can return and get refunded for no reason. Customer satisfaction is our priority. ?COMFORTABLE WEAR?: the frame wears very comfortable, and the lenses’ light transmittance is very good. Furthermore, casual frame design keeps you looks professional and fashionable while working or reading. ?REDUCE EYESTRAIN & VISUAL SYNDROME?: By preventing the injurious blue ray, K KENZHOU glasses can protect the eyes from computer visual syndrome (eyes losing focus, vision getting unclear, fatigue, ophthalmic acid, bulging, headache, etc.). So you don’t need to worry about hurting your eyes (getting myopia or vision getting declined, or other visual syndrome), just enjoy your digital time. ?PREVENT HARMLFULL BLUE RAY?: K KENZHOU anti blue ray glasses can effectively obstruct injurious blue ray, electromagnetic wave radiation, and ultraviolet rays. No matter it’s computers, laptops or smart phones, the glasses can always help to prevent harmful blue ray the screens emitted, protecting eyes from invisible injurious blue ray. So that the glasses can protect the eyes from computer visual syndrome (eyes losing focus, vision getting unclear, fatigue, ophthalmic acid, bulging, et). ?PACKING INCLUDES?: 1. Two pairs anti-blue ray computer glasses, which can minimize the eyestrain caused by harmful blue ray emitted from digital screens. 2. Complimentary frame packing cloth bag and cleaning cloth.