GUNNAR Gaming and Computer Eyewear/Emissary, Amber tint - patented lens, reduce digital eye strain, block 65% of harmful blue light GUNNAR Gaming and Computer Glasses: GUNNAR glasses protect your eyes and enhance performance. Reduce digital eye strain and block blue light with amber or liquet lens tint options. Patented Lens Technology: GUNNAR is the only patented gaming and computer eyewear recommended by doctors to protect and enhance your vision while viewing digital screens (Patented Lens #9417460). Reduce Digital Eye Strain: GUNNAR glasses address all short and long-term side effects associated with digital eye strain, including: headaches, dry eyes, blurry vision, glare, negative effects of artificial blue light, eye strain and fatigue. Block Blue Light: GUNNAR lens tints filter artificial blue light emitted from digital screens. Just how Sun Protection Factor (SPF) measures protection for the skin, the Blue Light Protection Factor (BLPF) scale measures lens protection for the eye. Sleep Better: GUNNAR glasses block harmful blue light, which helps you maintain your circadian rhythm, the bodys natural sleep cycle.