The Gunnar Optics VIN-06105Z Vinyl Full Rim Advanced Outdoor 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 naturally. The grey lens tint, anti-glare coatings and ultra-pure lens material help provide sharper, clearer vision. 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/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. Micro-engineered lens locks securely retain the lenses without undue stress or distortion of the optics. The wide format lenses create a panoramic viewing field for high-resolution viewing. The Vinyl is a medium fit frame with hidden spring hinges that flex to ergonomically fit a wide variety of head and face shapes.