【CLIP ON DESIGN】- PSI Blue Light Clip On Glasses is easy to over your prescription glasses for working, gaming, or browsing on PC, tablets, smart phones, TV or near office LED lights. Provide all-day protection for your eyes | 【BLOCK BLUE LIGHT & UV400 LENS】PSI blue light blocker lenses with UV400 protection effectively relieve your eye fatigue, blurred vision, headache, tired eyes,Please check your glasses size before buying to make sure the clips are fully compatible with your glasses | 【IMPROVE SLEEPING】-Wearing our blue filter glasses can turn your prescription and reading glasses into 99.9% effective blue light blocking glasses .Improve your sleep, help you sleep better and have a good night | 【BEST GIFT 】-It is a great idea to keep one of them in your office and home, or share one to your friend or family. A best gift to parents, friends, senior and yourself,gift for anyone that spends long periods of time in front of a screen, especially in the evening | 【LIGHTER AND SMALLER 】- The weighs of our blue light clip is only 8 g (0.28 ounces), so light that you may forget you've got clips on your glasses