☀【Reduce Eyestrain】Prolonged exposure to blue light will cause eye fatigue, blurred vision and headache. You will notice a difference, in just a few days, with our computer glasses. The glasses will block the most harmful blue light from your computer, phone and TV. | ☀【 High-Quality Materials】The 3A transparent lens not only blocks 99% of the harmful blue ray spectrum (400-440nm), but also allows high transmittance (93%), providing a perfect balance between eye protection and the visual experience. The lightweight and durable TR90 frames put no stress on your nose ensuring comfort for long periods of time. | ☀【Sleep Better】Prolonged exposure to blue light will slow or stop the production of melatonin, which causes sleep disorders. FEIYOLD Blue Light Shield can protect you and provide you with a better night's sleep. | ☀【Fashionable Style】Keep a pair in each of your reading areas, or share one with your friend or family. Giving you a fashionable style and allowing you to enjoy a peaceful deep sleep. | ☀【Product Dimension】Lens Width: 49mm(1.92in), Lens Height: 43mm(1.69in), Temple Length: 140mm(5.50in), Nose Bridge: 18mm(0.70in), Narrow Bridge: 12mm(0.47in), Frame Width: 138mm(5.43in)