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Blue light, a type of high-energy light, is part of the visible light spectrum. 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.
Blue light has a significant impact on numerous physiological processes in human health. [3] The widespread use of blue light in modern technology brings up a concern about the potential consequences of excessive blue light exposure. [4] Such exposure has been associated with disruptions in ocular health, sleep patterns, and well-being. [4] [5]
Closed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They should not be confused with phosphenes, perceived light and shapes when pressure is applied to the eye's retina, or some other non-visual external cause stimulates the eye.
During the day, blue light helps wake us up and keep us alert, Maturi notes. On the flip side, too much blue light exposure from screen use late at night can make it harder to fall asleep, says ...
Dr. Kelley says that blue light or anti-reflective coatings may provide additional eye relief, sharing, "If you are nearsighted, farsighted or have astigmatism, you can get prescription blue light ...
Using blue light therapy for your skin. You may’ve heard about blue light from your phone or other devices—it has a well-deserved reputation for keeping you wired and awake well past your bedtime.
The length of light exposure influences entrainment. Longer exposures have a greater effect than shorter exposures. [12] Consistent light exposure has a greater effect than intermittent exposure. [14] In rats, constant light eventually disrupts the cycle to the point that memory and stress coping may be impaired. [15]
Blue light has also been blamed for eye strain and discomfort. As a result, people have been shelling out for blue light-filtering spectacles in hopes of snoozing in peace and reducing visual fatigue.