☀【Reduce Eyestrain】Prolonged exposure to blue light will cause eye fatigue, blurred vision and headache, just with our computer glasses, you will notice a difference in a few days. Because the glasses block the most harmful blue light from computer, phone and TV. ☀【High Quality Materials】The 3A transparent lens not only block 99% harmful blue ray (400-440nm), also with high transmittance (93%), providing a perfect balance between eye protection and visual experience. The lightweight and durable TR90 frame puts no stress on your nose ensuring comfort for long periods of time. ☀【Sleep Better】Prolonged exposure to blue light will slowing or stopping the production of melatonin, causing sleep disorders. FEIYOLD Blue Light Shield can stop it and provide you with a better night's sleep.