Customize the look of your Oakley eyewear and get the best optical performance for where you use it most. All replacement lenses feature the unbeatable clarity, impact resistance and 100% UV filtering of Oakley's High Definition Optics (HDO ). High Definition Optics (HDO ) is a collection of patented technologies that allow Oakley eyewear to meet or exceed the testing standards of the American National Standards Institute for optical clarity, visual fidelity, and impact resistance. Eye damage attributed to ultraviolet light includes cataracts, pterygium and macular degeneration. Our Plutonite lens material filters out 100% of all UVA, UVB, UVC and harmful blue light up to 400nm. The protection is from the lens material itself.