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  2. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    In humans, brown is by far the most common eye color, with approximately 79% of people in the world having it. [28] Brown eyes result from a relatively high concentration of melanin in the stroma of the iris, which causes light of both shorter and longer wavelengths to be absorbed. [29] A light brown iris with limbal ring

  3. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    The dashed orange line is for a 53 year old eye, and dotted for a 75 year old eye, indicating the effect of lens yellowing.) Before reaching the retina, light must first transmit through the cornea and lens. UVB light (< 315 nm) is filtered mostly by the cornea, and UVA light (315–400 nm) is filtered mostly by the lens. [20]

  4. Red-eye effect - Wikipedia

    en.wikipedia.org/wiki/Red-eye_effect

    The red-eye effect in photography is the common appearance of red pupils in color photographs of human eyes. It occurs when using a photographic flash at low lighting or at night. When a flash passes through the eyes and rebounds at the back of the eye, it causes a red reflex in an image, turning the subject's eyes red.

  5. If you think you have blue or green eyes, they're actually brown

    www.aol.com/lifestyle/2016-12-19-if-you-have...

    By Susana Victoria Perez, Buzz60 If you think you have blue eyes, think again, they are actually tricking you! All eyes are really brown. According to CNN, Dr. Gary Heiting, a licensed optometrist ...

  6. Heterochromia iridum - Wikipedia

    en.wikipedia.org/wiki/Heterochromia_iridum

    "His right eye was light blue, while the left was black, nevertheless his eyes were most attractive", is the description of the historian John Malalas. [33] [34] [35] A more recent example is the German poet, playwright, novelist, scientist, statesman, theatre director, and critic, Johann Wolfgang Goethe. [36]

  7. Brown - Wikipedia

    en.wikipedia.org/wiki/Brown

    Brown irises range from highly pigmented, dark brown (almost black) eyes, to very light, almost amber or hazel irises composed partially of lipochrome. of Light or medium-pigmented brown eyes are common in Europe, Afghanistan, Pakistan and Northern India, as well as some parts of the Middle East, and can also be found in populations in East ...

  8. Trichromacy - Wikipedia

    en.wikipedia.org/wiki/Trichromacy

    Close-up of a trichromatic in-line shadow mask CRT display, which creates most visible colors through combinations and different levels of the three primary colors: red, green and blue Trichromacy or trichromatism is the possession of three independent channels for conveying color information, derived from the three different types of cone ...

  9. 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.