The Oakley O2 XL oo7045-34 in Canteen Iron with Fire Iridium Lens is a HIGH DEFINITION OPTICS LENSES 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.