BLUE BLOCKER TECHNOLOGY - Zenni Blokz are made with a special blue-light-blocking polymer incorporated into the lens that filters out harmful UV & blue light from digital screens, artificial light, and the sun. PREVENT FRYEYE - Too much blue light may cause FryEye, which can make your eyes feel tired, dry, blurry, or irritated. PROTECT YOUR EYES - Too much blue light exposure may damage the eyes over time. Help protect your eyes from UV & blue light by wearing Blokz blue blockers.