Color:Black Protect Your Eyes Digital screens release a form of invisible blue light.Blue Light is desirable to device manufacturers because of its efficiency and power. Cyxus can effectively block harmful blue light, which can lead to digital eye fatigue and eye strain. Great for alleviating visual fatigue and discomfort from long periods of fixing on the phone, web surfing, gaming and working under fluorescent lights. UV Protection You can get a painful burn on the front of your eye from the reflections of UV rays and sunlight. UV exposure will accelerate the aging of the eye, resulting in your old age when cataract. Our glasses can help protect your eyes from UV rays damage. Improving Sleeping People who use their devices before bed have a harder time falling asleep and staying asleep. Cyxus glasses work by blocking the blue light rays you are exposed to from your devices, you can still enjoy your device from the comfort of your bed and get a restful deeper sleep. The Lenses are characterized by high transparency, resistance to scratch, anti-collision, ultra-thinness and lightness as well as anti-glare. Cyxus glasses not only can block blue light/UV, eyes protection, you can also play a very good decorative effect, so you extraordinary temperament, quiet demeanor. These glasses allow the wearer to enjoy a classic, celebrated style while adding their own individuality. All of our products have been authenticated by the authoritative institutes. Eye doctors recommend wearing these blue light blocking glasses to protect your eyes. Product Warranty All of our products have 1 year warranty. Customer can send back the defective products for repair or exchange for free (if not man-made damage) during the period.