The Gunnar Optiks VIN-00103Z Vinyl Color Enhanced Computer Glasses are the only eyewear recommended by doctors to protect and enhance your vision when viewing digital screens at home or in the office. Eye strain, visual stress and dry eyes can be caused by extended periods of digital screen viewing and office lighting. Stay focused and perform more efficiently throughout the day with these stylish onyx frame glasses designed to improve visual performance, enhance focus and reduce eye strain for those with 20/20 vision. The Crystalline lens is specifically engineered for the graphic designer, video/film editor, or creative artist who requires an equally balanced color spectrum to design and edit in true color. Their 57-millimeter wide lens design frames your face to protect your eyes from dry air currents, effectively preventing irritation. GUNNAR"s i-AMP lens technology is specifically engineered to filter out the harsh, high-energy part of the spectrum, reduce digital eye strain and enhance viewing detail. The Vinyl"s 135-millimeter temples, 35-gram lightweight construction and full rim frame are composed of aluminum-magnesium alloy and designed to generate proper strength and optical stability. Keep your glasses in place with the 15-millimeter nose bridge and adjustable pads that articulate (3) dimensions for a dynamic fit. Micro-engineered locks securely retain the lenses without undue stress or distortion to the optics, while the hidden spring hinges flex to ergonomically fit a wide variety of head and face shapes. Gunnar Optiks VIN-00103Z Vinyl Full Rim Color Enhanced Computer Glasses come with a (1) year limited warranty against manufacturing defects. The ultimate result is improved clarity, focus and performance that meet the demanding visual needs of a new generation. Visit www.amazon.com/gunnaroptiks for more information on Gunnar Optiks and our extensive line of products.