Oakley lens tints are engineered to offer the best combination of light filtering, colour balance and visual contrast. Visibility on the mountain can vary wildly, from socked-in blizzards to blindingly bright sunlight, and everything in between. Oakley offers a comprehensive array of performance lenses that match specially engineered base tints with unique Iridium coatings, designed to precisely tune, contrast and balance light transmission. All Oakley lenses offer HDO Technology with the following benefits: Clarity: Conventional lenses can magnify images. HDO precision gives less distorted vision across the entire field of view. Refraction: With regular lenses, objects aren't really where you see them. HDO offers a truer visual image so your brain won't have to work overtime. UV Protection: All Oakley lenses block 100% of UVA, UVB & UVC rays and harmful blue light up to 400 nm. Important Note:Use care when installing/removing accessory lenses. Scratched lenses cannot be returned and are not covered under Oakley's warranty policy