The smoke-tinted lenses are polarized for superior optical clarity, even outdoors as sunglasses in bright sunlight, meeting the EN 1836 188.8.131.52 standard for polarization quality. They help reduce the glare of reflected light, decreasing the risk of eye stress and eye fatigue. The polycarbonate lenses provide 99.9% UVA/ UVB/UVC protection to help prevent eye damage like cataracts, retinal damage, and other conditions that can cause temporary vision loss. The wraparound frame has a base curve of 8 that extend the range of peripheral protection, as well as soft touch temples for comfort. Each pair of KleenGuard Nemesis Polarized Safety Glasses come with a neck cord, so that the glasses are ready to protect at a moment's notice. The safety eyewear is manufactured to exceed the (ANSI / ISEA) Z87.1+ standard for personal eye protection. The EN166 7.3.1 "K" mark lets you know that they feature superior anti-scratch performance, for increased durability.