Possible treatments for<unk> s include: * Chronotherapy, best shown to effectively treat delayed sleep phase<unk> , acts by systematically delaying an individual's bedtime until their sleep-wake times coincide with the conventional 24-hr day. * Light therapy utilizes bright light exposure to induce phase advances and delays in sleep and wake times. This therapy requires 30–60 minutes of exposure to a bright (5,000–10,000 lux) white, blue, or natural light at a set time until the<unk>  clock is aligned with the desired schedule. Treatment is initially administered either upon awakening or before sleeping, and if successful may be continued indefinitely or performed less frequently. Though proven very effective in the treatment of individuals with DSPD and ASPD, the benefits of light therapy on N24SWD, shift work<unk> , and jet lag have not been studied as extensively. * Hypnotics have also been used clinically alongside bright light exposure therapy and pharmacotherapy for the treatment of<unk> s such as Advanced Sleep Phase<unk> . Additionally, in conjunction with cognitive behavioral therapy, short-acting hypnotics also present an avenue for treating co-morbid insomnia in patients suffering from<unk>  sleep<unk> s. * Melatonin, a naturally occurring biological hormone with<unk><unk> icity, has been shown to promote sleep and entrainment to external cues when administered in drug form (0.5–5.0 mg). Melatonin administered in the evening causes phase advances in sleep-wake times while maintaining duration and quality of sleep. Similarly, when administered in the early morning, melatonin can cause phase delays. It has been shown most effective in cases of shift work sleep<unk>  and delayed phase sleep<unk> , but has not been proven particularly useful in cases of jet lag. * Dark therapy, for example, the use of blue-blocking goggles, is used to block blue and blue-green wavelength light from reaching the eye during evening hours so as not to hinder melatonin production.
Circadian rhythm sleep disorder
Non-24-hour sleep–wake disorder
Shift work sleep disorder
Delayed sleep phase disorder
Advanced sleep phase disorder
Sleep disorder
Rapid eye movement sleep behavior disorder
Sleep state misperception