The Gunnar Optics EPO-00103Z Epoch Semi-Rimless Color Enhanced Computer Glasses is an excellent "out-of-the-box" solution to improve your visual performance and reduce eye fatigue for those with 20/20 vision. Eyestrain, visual stress and dry eyes can be caused by extended periods of digital screen viewing and office lighting. Gunnar"s digital eyewear filters out the harsh, high-energy part of the spectrum and creates a more relaxed viewing experience to help your eyes focus more naturally. The Crystalline lens and coating formula is specifically engineered for the graphic designer, video/film editor or creative visual artist that requires an equally balanced color spectrum to design and edit in true color. Gunnar"s i-AMP lens technology is specifically engineered to reduce digital eyestrain and enhance viewing detail so you can focus longer, work more efficiently and feel more comfortable. Made of aluminum-magnesium with an onyx and gunmetal frame finish, the Vinyl optics is designed to generate proper strength and optical stability through a hybrid lightweight metal alloy. The lightweight construction and proper weight balance guarantee longwearing comfort without pressure points or fatigue. The unique squared off lenses and semi-rimless frame design minimizes peripheral distractions. Hidden spring hinges flex to ergonomically fit a wide variety of head and face shapes. The Epoch is a narrow fit frame ideal for smaller heads. Soft thermoplastic rubber tipped temples grip lightly to ensure proper location of the optics without slippage and adjustable silicone nose pads articulate in (3) dimensions to properly fit and comfortably secure eyewear in place. Squared off lenses for an angular look, the Epoch is inspired by the past with an eye toward the future. The Gunnar Optics EPO-00103Z Epoch Semi-Rimless Color Enhanced Computer Glasses comes with a 1-year limited warranty against manufacturing defects.