Light can help you see. But light can also obscure your vision and blind you. Polarized lenses know the difference. Blocking out the glare from above and reflected light from below, Kazbek Polarized lets in only what you want and need to see, and when you can focus, there's no telling what you can get done. Polarized Copper lenses filter out Blue Light or haze which can cause eye fatigue, tired, strained, or sore eyes, and also offers the added feature of a polarized lens. Specifically engineered as a high contrast driving lens. Provide 99.9% Protection from UVA, UVB and UVC Rays. ANSI Z87.1+ 2010 Compliant.