ANTI-BLUE LIGHT and ANTI-RADIATION COATED LENSES The anti-blue light glassesand anti-radiation coated lenses glasses for eyes strain are best used for long hours of computer use to reduce symptoms of eyestrain and maintain natural sleep patterns. The original non-prescription lenses can be replaced with progressive lenses at any store. of eyestrain and maintain natural sleep patterns. The original non-prescription lenses can be replaced with progressive lenses at any store. UNBREAKABLE ECO-FRIENDLY TR90 MATERIAL TR90 is a kind of material which is super toughness, wear-resistance, stress-resistance, thus the frame is not easily deformed or damaged. These blue light blocker glasses are made of TR90 full rim combined with durable half metal frame, anti-blue light and anti-radiation lenses, all the quality details ensuring you a perfect wearing experience. PROTECT YOUR EYE: Anti harmful blue light , screen flicker, anti-fatigue, provide all-day protection,without getting that harsh yellow found in other glasses STYLISH PATTERNS AND RETRO FRAME DESIGN The patterns and retro frame shapes are designed . The fashion frames can be matched with all kinds of facial forms. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.