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 G-15 Silver Mirror lenses were designed by the US Air Force to maximize transmission of light 555 nm (green/yellow light). Provides contrast and image definition while offering a cooling sensation to the eyes, and also offers the added feature of a polarized lens. Provide 99.9% Protection from UVA, UVB and UVC Rays. ANSI Z87.1+ 2010 Compliant.