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  2. Chromostereopsis - Wikipedia

    en.wikipedia.org/wiki/Chromostereopsis

    Bluered 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 redblue or redgreen colors, but can also be perceived with red–grey or blue–grey images.

  3. Impossible color - Wikipedia

    en.wikipedia.org/wiki/Impossible_color

    In 1983, Hewitt D. Crane and Thomas P. Piantanida performed tests using an eye-tracker device that had a field of a vertical red stripe adjacent to a vertical green stripe, or several narrow alternating red and green stripes (or in some cases, yellow and blue instead). The device could track involuntary movements of one eye (there was a patch ...

  4. List of flags by color combination - Wikipedia

    en.wikipedia.org/wiki/List_of_flags_by_color...

    The five major colors of European heraldry (black, red, green, blue, and purple) are sorted next. Miscellaneous colors (murrey, tan, grey, and pink) are sorted last. Similar colors are grouped together to make navigation of this list practical.

  5. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    The irises of human eyes exhibit a wide spectrum of colours. 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.

  6. Tapetum lucidum - Wikipedia

    en.wikipedia.org/wiki/Tapetum_lucidum

    The dark blue, teal, and gold tapetum lucidum from the eye of a cow Retina of a mongrel dog with strong tapetal reflex. The tapetum lucidum (Latin for 'bright tapestry, coverlet'; / t ə ˈ p iː t əm ˈ l uː s ɪ d əm / tə-PEE-təm LOO-sih-dəm; pl.: tapeta lucida) [1] is a layer of tissue in the eye of many vertebrates and some other animals.

  7. Scolopsis bilineata - Wikipedia

    en.wikipedia.org/wiki/Scolopsis_bilineata

    Scolopsis bilineata, the two-lined monocle bream, bridled monocle bream, bridled spinecheek, double-lined coral bream or yellow-finned spine-cheek, is a species of marine ray-finned fish belonging to the family Nemipteridae, the threadfin breams. This species is found in the Indian and Western Pacific Oceans.

  8. Agalychnis callidryas - Wikipedia

    en.wikipedia.org/wiki/Agalychnis_callidryas

    In the red-eyed tree frog's case, the frog's startling red eyes are hidden when its eyes are closed allowing it to blend in with leaves. When the frog is startled, it can flash its bright red eyes, orange webbed feet, and blue and yellow lateral stripes, which all serve the purpose of startling predators and allowing the frog time to escape. [9]

  9. McCollough effect - Wikipedia

    en.wikipedia.org/wiki/McCollough_effect

    A test image for the anti-McCollough effect. On first looking at this image, the vertical and horizontal lines should look black and white, colorless. After induction, the space between vertical lines should look green and the space between horizontal lines should look red.