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

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

    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.

  3. Blue light spectrum - Wikipedia

    en.wikipedia.org/wiki/Blue_light_spectrum

    The blue light spectrum is an essential part of the visible spectrum with wavelengths of about 400-480 nm. [1] Blue light is primarily generated by Light-Emitting Diodes (LED) lighting and digital screens, it has now become prevalent in the world around us. [2] LED lighting creates white light by combining blue light with other wavelengths ...

  4. Viola sororia - Wikipedia

    en.wikipedia.org/wiki/Viola_sororia

    Common Blue Violet (Viola sororia) color variant. Viola sororia is a short-stemmed, herbaceous perennial plant that grows in well-drained and shady habitats. [5] This 15–25 centimeters (6–10 in) wide violet has glossy, heart-shaped leaves and are topped with purple flowers with white throats. The lower three petals are hairy and the stem of ...

  5. Chromotherapy - Wikipedia

    en.wikipedia.org/wiki/Chromotherapy

    Chromotherapy, sometimes called color therapy, colorology or cromatherapy, is an alternative medicine that is considered pseudoscience and quackery. [1][2][3][4] Chromotherapists claim to be able to use light in the form of color to balance "energy" lacking from a person's body, whether it be on physical, emotional, spiritual, or mental levels.

  6. Light therapy - Wikipedia

    en.wikipedia.org/wiki/Light_therapy

    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, and skin wound infections.

  7. Violet ray - Wikipedia

    en.wikipedia.org/wiki/Violet_ray

    Another electrode used with the same set. A violet ray is an antique medical appliance used during the early 20th century to discharge in electrotherapy. Their construction usually featured a disruptive discharge coil with an interrupter to apply a high voltage, high frequency, low current to the human body for therapeutic purposes.

  8. Viola adunca - Wikipedia

    en.wikipedia.org/wiki/Viola_adunca

    Viola bellidifolia. Viola cascadensis. Viola adunca is a species of violet known by the common names hookedspur violet, early blue violet, sand violet, and western dog violet. It is native to meadows and forests of western North America, Canada, and the northern contiguous United States. [1][2]

  9. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [1][2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3]: 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of melanin in the ...

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