Blue Light Blocking Glasses Women/Men,Retro Round Anti Eyestrain Computer Reading Gaming Glasses Non-Prescription (2 Pack)

What is Blue Light? “Blue light” is everywhere, and it is a general term and refers to all the light that falls in the range of 400-495nm. The “bad” blue light is only in the 400-430nm range. The “good” blue light is in the 430-490nm range and we need that to stay healthy and to survive. Where does blue light come from? Blue light emanates primarily from the sun, and also from fluorescent lights, Compact Fluorescent Light (CFL) bulbs, flat-screen LED TVs and screens, LED Lights, computer monitors, smartphones, and tablet screens. Why do we need to wear blue light glasses? Because Blue light glasses can effectively block harmful blue light from mobile phones, computer monitors, tablets and other devices. Relieve eye strain, headache, dry eyes, blurred vision and other symptoms. How is it work? The current anti-blue light technology is mainly divided into two types: Substrate absorption: Anti-blue light factor is added to the lens substrate to absorb harmful blue light. This kind of lens surface won’t show the blue reflect light. Coating reflection: The surface of the lens is coated to reflect harmful blue light. That’s why they show the blue reflect light when we looking at. Our glasses use the first technology, the lens had added the anti-blue light factor, can absorb and filter harmful blue light. Effectively prevent harmful blue light from entering your eyes through the lens. Package Include: 2x Blue Light Blocking Glasses 1x Glasses Cloth 2x Glasses Pouch 1x Screwdriver 1x Blu-Ray Test Card 1x Blu-Ray Test Light Kindly Note:In addition to wearing anti-blue glasses, we need to take regular breaks (that is, the 20-20-20 rule: take a break every 20 mins and look at an object 20 meters away for 20 seconds), it is also a good way to relieve your eyestrain.