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 the computer, phone, and TV. High-Quality Materials. The 3A transparent lens not only blocks 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.