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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 blocking filters are being designed into glasses to avoid ...
Downie also says it is “unclear” whether blue light glasses impact vision and sleep quality, as well as long-term retinal health. There was also a lack of information about the differences ...
But while some kids love sleepovers, others prefer to sleep in their own bed, feeling nervous at the thought of leaving their home for a night.
Despite their popularity, blue light-blocking glasses probably don’t do much to reduce eyestrain, help keep people alert or improve sleep, according to a meta-analysis looking at 17 studies ...
Computer vision syndrome ( CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time and the eye's muscles being unable to recover from the constant tension required to maintain focus on a close object.
People with non-24 experience daily shifts in the circadian rhythm such as peak time of alertness, body temperature minimum, metabolism and hormone secretion. These shifts do not align with the natural light–dark cycle. Non-24-hour sleep–wake disorder causes a person's sleep–wake cycle to move around the clock every day, to a degree dependent on the length of the cycle. This is known as ...
A genetic predisposition for insomnia has been found among some children, a new study found. But there are still actions you can take to help your kids, experts said.
X-ray specs or X-ray glasses are an American novelty item, purported to allow users to see through or into solid objects. In reality, the spectacles merely create an optical illusion; no X-rays are involved. The current paper version is sold under the name "X-Ray Spex"; a similar product is sold under the name "X-Ray Gogs".
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