GUNNARS patented lens technology is designed and engineered to meet the demanding visual needs of the digital generation. GUNNARS lens design limits air currents near the eyes, increasing humidity and preventing irritation. This design enhances focus and sharpens detail to ease eye strain. The high-index lens material eliminates distortion from impurities and haze found in inferior materials to ensure the clearest image possible. The ultra light yet durable, performance optics will not degrade over time. GUNNARS proprietary lens tint filters blue light and blocks UV to enhance contrast and protect eyes. The filtered spectrum replicates natural light, minimizing visual stress. Premium lens coatings reduce glare and reflective light to eliminate visual distraction and stress. An external hard coat provides extended lens durability resisting scratches.