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  2. Helmholtz–Kohlrausch effect - Wikipedia

    en.wikipedia.org/wiki/Helmholtz–Kohlrausch_effect

    The difference between brightness and lightness is that the brightness is the intensity of the object independent of the light source. Lightness is the brightness of the object in respect to the light reflecting on it. This is important because the Helmholtz–Kohlrausch effect is a measure of the ratio between the two. [3]

  3. HCL color space - Wikipedia

    en.wikipedia.org/wiki/HCL_color_space

    The "attribute of a visual sensation according to which an area appears to be similar to one of the perceived colors: red, yellow, green, and blue, or to a combination of two of them". [8] Lightness, value The "brightness relative to the brightness of a similarly illuminated white". [8] Luminance (Y or L v,Ω)

  4. 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.

  5. Purkinje effect - Wikipedia

    en.wikipedia.org/wiki/Purkinje_effect

    An animated sequence of simulated appearances of a red flower (of a zonal geranium) and background foliage under photopic, mesopic, and scotopic conditions. The Purkinje effect or Purkinje phenomenon (Czech: [ˈpurkɪɲɛ] ⓘ; sometimes called the Purkinje shift, often pronounced / p ər ˈ k ɪ n dʒ i /) [1] is the tendency for the peak luminance sensitivity of the eye to shift toward the ...

  6. Hunt effect (color) - Wikipedia

    en.wikipedia.org/wiki/Hunt_effect_(color)

    At higher luminance, he noted a hue shift of colors to be more blue with higher luminance, which is now known as the Bezold–Brücke effect. The Hunt effect is related to the Helmholtz–Kohlrausch effect , where a saturated stimulus is seen to be brighter than less saturated or achromatic stimuli.

  7. A Full List of Recalled Eye Drops Linked to Potential ... - AOL

    www.aol.com/full-list-recalled-eye-drops...

    While it's not technically an eye drop product, implicated tubes of ointment (which is used on skin in proximity to the eye) can be identified with the NDC 72570-122-35 and UPC code 3 72570 12235 3.