Archgon Computer Glasses Anti Blue Light UV Protection Clip-on Flip-up Type with Amber Lens (compatible with a single lens within 1.55 inches height and 2.35 inches width) FDA registered company. Buy with confidence. Cover a single lens within 1.55 inches height and 2.35 inches width Non-prescription lens. Blue light blocking rate: 65.14%. Tested by SGS, a Swiss-based lab. Note: 100% of blocking rate will cause color distortion Special coated lens blocks harmful blue-light emitted from the screen of your computer, cellular phone, TV, and other electronic devices; help reduces symptoms of dry eyes, strain, and headache from long hours of viewing Coated lens reduces flare and has minimum effect on color accuracy, designed for professional as well as for serious hobbyist Comes with carrying pouch and cleaning cloth