Classic Anti Radiation Photochromic Eyeglasses for Men Women Replaceable Lens

photochromic lens automatically adapts to your environment. It will darken when exposed under the sun giving you UV400 protection and will turn back to its clear or primrose color when you go back inside. All this while giving you blue light protection from digital screens.Anti Blue lens protect your eyes from the blue light emitted from digital screens. Long hours of screen exposure can be harmful to your eyes as it may cause digital eye strain and disrupt your sleep quality. Blue light is a high-frequency light wave between 380 - 485 nm. It is emitted from the digital screens of your smartphones and computers.