ALWAYSUV Children Kids Teens Blue Light Filter Computer Glasses for Blocking Anti Eye Eyestrain TR90 Transparent Lens Black Red

Features Material: TR90 Lens: Transparent lenses glasess Frame: A stylish, compact and lightweight retro classic full Round frame design Color:Black,Black Blue, Black Red, Black Purple,Pink Blue,Blue Package include: 1 x glass Blue light blocking If you are unfamiliar with blue light it's right next to UV light on the spectrum of light. It is comprised of very high energy and a low wavelength very similarly to UV light. All of our electronic devices with a back-lit screen give off large quantities of blue light (Iphones, Ipod, Laptop, Computer TV.) This blue light messes with our internal clock making us think it's mid day when really it can be closer to night and stops our body from naturally producing the melanin that helps us fall asleep late at night. Measurements Lens width: 49mm Lens height: 40mm Nose Bridge: 16mm Arm?136mm Cleaning: 1. The glasses should be treated carefully to avoid damage and should be cleaned regularly 2. Clean the lens using soap water or neutral detergent, gently wipe dry with the soft glasses cloth