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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 in artificial narrowband form has a number of proven negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related ...
Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, neonatal jaundice, and skin wound infections.
As the Mayo Clinic explains it: “A regular sauna uses heat to warm the air, which in turn warms your body. An infrared sauna heats your body directly without warming the air around you.”
Sun specs (also sunspecs) is the shortened form of sun spectacles. Sunglass a monocle version. [citation needed] Sun-shades can also refer to the sun-shading eyepiece-type, although the term is not exclusive to these. Also in use is the derivative abbreviation, "shades". Dark glasses (also preceded by pair of) — generic term in common usage.
The lenses of solar eclipse glasses are made of black polymer, or resin infused with carbon particles, that blocks nearly all visible, infrared and ultraviolet light, according to The Planetary ...
The solar eclipse of December 26, 2019 seen through a pair of solar eclipse glasses in Jaffna, Sri Lanka. A cat demonstrating a pair of eclipse glasses. Solar viewers (also known as solar viewing glasses or solar eclipse glasses) are special eyewear designed for direct viewing of the Sun. Standard sunglasses are unable to filter out eye ...
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