Progressive Lenses No-line bifocals offer continuous, uninterrupted vision for distance, reading and everywhere in between. Your eyes make a smooth transition between vision zones with no "jump" or distracting lines. More about progressive lenses... Progressive Lens Formula Our precise and reliable formula makes it simple to order progressive lenses online - all we need is your prescription and a pupil distance measurement. More about our progressive lens formula.. Plastic Lenses Plastic is the most commonly used lens material on the market today. Lighter and more durable than glass, plastic lenses can be molded and ground into almost any shape and will work with almost all prescriptions. More about plastic lenses... Polycarbonate Lenses For the safest eyewear, polycarbonate is the lens material of choice. These sturdy, impact resistant lenses are highly recommended for children's eyewear, safety glasses and for rimless frames that require drill mounts. More about polycarbonate lenses... Hi Index 1.67 Lenses Using the highest index of refraction, 1.67 lenses are up to 60% thinner than normal lenses and have superior anti-reflective lens coatings. More about hi index 1.67 lenses.. Hi Index 1.74 Lenses 1.74 Hi index lenses are the absolute thinnest and lightest lenses available. They’re 13% thinner than 1.67 lenses and are the most cosmetically appealing eyeglass lenses ever developed. More about hi index 1.74 lenses... Oakley Lenses Oakley prescription lenses are lightweight, offer unsurpassed impact protection and incorporate their patented XYZ Optics® that provide razor-sharp vision at every angle. More about Oakley lenses... Anti-Reflective Lens Coatings Anti-reflective coatings have quickly become a "must-have" for any pair of lenses. By reducing glare, anti-reflective coatings make the lenses "invisible" in pictures and reduce eye strain for computer users and night drivers. More about anti-reflective coatings... Transitions® Lenses and Drivewear® Lenses Photochromic lenses respond to UV rays by automatically changing from nearly crystal-clear to sunglass-dark. These lenses come in several colors and are an excellent choice for full-time eyeglass wearers who spend a lot of time in varying light conditions. More about Transitions® Optical lenses and Drivewear® Lenses Transitions" and the Transitions swirl are registered trademarks and "Healthy sight in every light" and "ESP" are trademarks of Transitions Optical, Inc.