Night Driving Glasses - Phenom with Canary Yellow Anti-reflective Double Sided Lenses polycarbonate frame Enhanced Polycarbonate lens with AR Coating on both Front and Back Surfaces The unique coating eliminates the glare from oncoming head lights Blocks harmful UV light rays and effectively blocks much of the blue light Helps improve vision at night and helps distinguish fine details during the day Reduce headaches that usually are caused by prolonged, unprotected exposure to the persistent onslaught of harmful rays