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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.
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] The intensity and the wavelength of light influence entrainment. [2] Dim light can affect entrainment relative to darkness. [16]
It emits more blue light than traditional incandescent bulbs, potentially impacting the quality of sleep and eye health if used excessively at night. [2] [8] A person using a smartphone at night. Blue light is emitted by digital screens such as computers, tablets, smartphones, and televisions, which can lead to extended exposure in modern lives ...
Where blue light may be more impactful, then, is negatively influencing our circadian rhythms; and late-night computer, phone and television users often experience disruption in their natural ...
Screens — including TV, your phone and your computer — provide blue light exposure that may impact sleep. “There’s a lot of data that says the light disrupts the circadian rhythm and ...
According to Harvard Medicine, blue light can help boost focus and mood during the day but can disrupt sleep at night and suppress the release of melatonin—the sleep hormone. Blue light has also ...
Common sources of artificial light include outdoor lighting and the screens of electronic devices such as smartphones and televisions, which emit large amounts of blue light, a form of light typically associated with daytime. This disrupts the release of the hormone melatonin needed to regulate the sleep cycle. [11]
A new review finds that the popular lenses don't help with eye strain, alertness or sleep. Blue light-blocking glasses don't protect eyes or improve sleep, study finds Skip to main content