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  2. Need to start waking up earlier — or stay up later? Sleep ...

    www.aol.com/lifestyle/start-waking-earlier-stay...

    For some people, waking up early is a breeze. ... Studies show that having caffeine even six hours before bed can cause sleep ... night mode” on your phone or wearing blue light-blocking glasses ...

  3. Are blue light glasses really worth it? A new analysis says ...

    www.aol.com/finance/blue-light-glasses-really...

    The researchers hope to conduct further research on the effects of blue light glasses on sleep, eye health, and more, Dr. Sumeer Singh, an author on the study from the Downie Laboratory, said in ...

  4. Biological effects of high-energy visible light - Wikipedia

    en.wikipedia.org/wiki/Biological_effects_of_high...

    High-energy visible light ( HEV light) is short-wave light in the violet / blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health ( blue-light hazard ), which can lead to age-related macular degeneration. [ 1][ 2] Increasingly, blue ...

  5. Blue light-blocking glasses don't protect eyes or improve ...

    www.aol.com/news/blue-light-blocking-glasses...

    The glasses, which sellers claim protect the eyes from potentially harmful blue light coming from screens, first hit the scene in the early 2000s. Search interest skyrocketed in the first year of ...

  6. Rapid eye movement sleep behavior disorder - Wikipedia

    en.wikipedia.org/wiki/Rapid_eye_movement_sleep...

    Rapid eye movement behavior disorder occurs when there is a loss of normal voluntary muscle atonia during REM sleep resulting in motor behavior in response to dream content. It can be caused by adverse reactions to certain drugs or during drug withdrawal; however, it is most often associated with the elderly and in those with neurodegenerative ...

  7. Sleep deprivation - Wikipedia

    en.wikipedia.org/wiki/Sleep_deprivation

    Sleep deprivation, also known as sleep insufficiency [2] or sleeplessness, is the condition of not having adequate duration and/or quality of sleep to support decent alertness, performance, and health. It can be either chronic or acute and may vary widely in severity. All known animals sleep or exhibit some form of sleep behavior, and the ...

  8. Extreme heat means nights are getting warmer — and it's bad ...

    www.aol.com/lifestyle/extreme-heat-means-nights...

    Struggling with sleep due to heat here and there is unlikely to have a major impact on your health, Winter says, but it can add up over time. “Imagine only receiving 90% of the calories and ...

  9. Seasonal affective disorder - Wikipedia

    en.wikipedia.org/wiki/Seasonal_affective_disorder

    Seasonal affective disorder ( SAD) is a mood disorder subset in which people who typically have normal mental health throughout most of the year exhibit depressive symptoms at the same time each year. [ 1][ 2] It is commonly, but not always, associated with the reductions or increases in total daily sunlight hours that occur during the summer ...