Description Features Amber Blue Light Blocking Glasses Our scientifically-designed-and-manufactured blue light blocking glasses not only all block blue light but make you look good while doing it! The SunDown Amber Lens has been specifically designed and proven to block 100% of blue from 400-500nm. Using the SunDown Amber lenses provides the perfect balance of a lighter amber tint allowing more visual colour perception, while still remaining effective at blocking 100% of harmful blue light. These glasses are perfect for use in the early evening when blue light protection is required but greater colour perception is preferred. For Maximum Night-time protection, use our NightFall Red Lens range; These Blue and Green Light Blocking Glasses block 100% of blue AND green light up to 550nm. SunDown Amber Lens: 100% of blue light harmful blue light is blocked (400nm - 500nm) Lighter Amber tint allows more color perception at night Specifically designed to help you sleep by blocking harmful blue light that lowers melatonin levels Use after sunset when you are exposed to artificial light, to enjoy improved quality of sleep Premium frame made from high quality aliminium with durable spring hinges. Premium carry case and lens cloth included Dimensions: Lens Width - 52mm Lens Height - 50mm Arms - 140mm Bridge - 19mm