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  2. Color blindness - Wikipedia

    en.wikipedia.org/wiki/Color_blindness

    Confusion colors are pairs or groups of colors that will often be mistaken by the color blind. Confusion colors for red–green color blindness include: cyan and grey; rose-pink and grey; blue and purple; yellow and neon green; red, green, orange, brown; Confusion colors for tritan include: yellow and grey; blue and green; dark blue/violet and ...

  3. Impossible color - Wikipedia

    en.wikipedia.org/wiki/Impossible_color

    Exploration of the color space outside the range of "real colors" by this means is major corroborating evidence for the opponent-process theory of color vision. Chimerical colors can be seen while seeing with one eye or with both eyes, and are not observed to reproduce simultaneously qualities of opposing colors (e.g. "yellowish blue"). [7]

  4. Evolution of color vision - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_color_vision

    Today, most mammals possess dichromatic vision, corresponding to protanopia red–green color blindness. They can thus see violet, blue, green and yellow light, but cannot see ultraviolet or deep red light. [5] [6] This was probably a feature of the first mammalian ancestors, which were likely small, nocturnal, and burrowing.

  5. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Birds, however, can see some red wavelengths, although not as far into the light spectrum as humans. [46] It is a myth that the common goldfish is the only animal that can see both infrared and ultraviolet light; [47] their color vision extends into the ultraviolet but not the infrared. [48]

  6. Farnsworth Lantern Test - Wikipedia

    en.wikipedia.org/wiki/Farnsworth_Lantern_Test

    Nine color pairs are administered during the test, beginning with a red/green combination, to allow the patient to see these two colors prior to seeing a white light, which decreases testing errors. The examinee is shown the target for only two seconds, as color-deficient patients can sometimes correctly identify the colors with prolonged exposure.

  7. Chromostereopsis - Wikipedia

    en.wikipedia.org/wiki/Chromostereopsis

    Blue–red contrast demonstrating depth perception effects 3 Layers of depths "Rivers, Valleys & Mountains". Chromostereopsis is a visual illusion whereby the impression of depth is conveyed in two-dimensional color images, usually of red–blue or red–green colors, but can also be perceived with red–grey or blue–grey images.

  8. Color blind glasses - Wikipedia

    en.wikipedia.org/wiki/Color_blind_glasses

    Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair daily color tasks such as selecting ripe fruit or choosing clothing, as well as safety-related tasks such as interpreting traffic lights. While the disability of color blindness is considered minor, the use of color in safety ...

  9. Young–Helmholtz theory - Wikipedia

    en.wikipedia.org/wiki/Young–Helmholtz_theory

    Thomas Young and Hermann von Helmholtz assumed that the eye's retina consists of three different kinds of light receptors for red, green and blue.. The Young–Helmholtz theory (based on the work of Thomas Young and Hermann von Helmholtz in the 19th century), also known as the trichromatic theory, is a theory of trichromatic color vision – the manner in which the visual system gives rise to ...

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