OX Legacy Blue Light Blocking Glasses help prevent blue light from reaching your eyes during the evening, which can help you sleep better at night. Exposure to light during the evening can disrupt a natural sleep cycle, but sometimes it just isn't possible to shut off the computer or put away the phone. OX Legacy's yellow lenses reduce incoming light from the blue light spectrum. OX Legacy lenses are surprisingly clear, with a comfortable frame for nighttime use watching TV, looking at a computer, tablet, or any backlit screen. OX Legacy: be legendary.