Re-Timer is a light device, worn just like a pair of glasses, that produces a 100% UV-free green light, which helps your body recognize when to be awake and when to sleep. This type of light has been proven to naturally help you sleep by re-setting your circadian rhythm or body clock. Re-Timer may help if you: • have trouble sleeping at night • feel lethargic and sleep deprived in the morning • are sleeping and waking at the wrong times.