1. BLUE LIGHT BLOCKER & REPLACEABLE LENSES – Reduce symptoms of eyestrain during prolonged computer exposure. These glasses are best used for long hours of computer use to maintain natural sleep patterns and eye protection. The original lenses can be replaced with your prescription lenses at any store. 2. HIGH-QUALITY MATERIALS – These retro blue light blocking glasses are made of reinforced metal frames, soft silicone nose pads, and durable spring hinges, all the quality details ensuring you a perfect performance. The soft silicone nose pads can adapt to different nose shapes. Reduce the burden on your bridge of the nose and create a new sense of fashion. 3. COMFORTABLE WEARING – Lightweight and durable. These stylish blue light blocking glasses fit well both for small faces and big heads because of adjustable temples and nose guards. You can wear our glasses for long periods in front of digital screens or your upcoming trip out of town.