Worn a few times. It works, I just forget to keep up with it! These are the OS-1 model Sleep Glasses in excellent used condition. There are no flaws or scratches. They're just like new at a big discount! Clinically proven, highly effective orange precision tinted lenses developed by eye doctors, to help you fall asleep naturally. These lenses block harmful blue light that interfere with your ability to fall asleep. Simply wear your Ocusleep glasses 2 hours before you go to bed. The orange/amber tinted lenses will block blue light and help your brain to release natural melatonin. Ocusleep lenses use a precision tint developed by eye doctors that blocks harmful blue light, to help you naturally fall asleep without the need for prescription pills and over-the- counter supplements. • OS-1 is made with premium, ultra-light TR90 technology. It's flexible for those times you'll fall asleep with them on. • This frame is best for a small or medium-sized face. • Ocusleep lenses are made with precision pigments in ophthalmic CR-39. • Size is 44-18-145 and total width is 136mm.