SPLICE SNOW ACCESSORY LENSES HIGH DEFINITION OPTICS&Reg; (HDO&Reg;) combines patented innovations with pure PLUTONITE? lens material to offer unbeatable clarity, and it maintains 100% UV filtering while providing unsurpassed impact protection. Fog buildup is a performance killer, so these goggle lenses feature a permanent, specially formulated coating that helps keep your view free and clear Oakley?s CAD/CAM engineering makes lens replacement simple yet maximizes impact protection while the lenses are installed. For select goggles, choose an optional IRIDIUM? lens coating to reduce glare and balance light transmission for improved vision.