Alleviates visual fatigue and discomfort from long periods of web surfing, gaming and working under fluorescent lights with UV400 protection and glare reduction. Blue light blocking glasses allow you to use your device before bedtime and still enjoy a restful night’s sleep. he frame of these blue light glasses are made from TR90 material. TR material makes these computer glasses only half weight of plastic glasses, and two times durable. And these blue light blocking glasses are also constructed with reinforced metal hinges to ensure durability and avoid breaking. No fade.