Adult-size Blue Light Blocking glasses with ABS Plastic frames and Polycarbonate lenses. Wearing these can help limit eyes from exposure to blue light (mostly found in technology items such as phones, tablets and computers) which can cause strain to the human eye. The wavelength of blue light can be harmful to the retina (generally discomfort) and can even affect sleep. Lenses also feature ultraviolet protection level UV400 (100% UV).