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  2. Eye color - Wikipedia

    en.wikipedia.org/wiki/Eye_color

    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 ...

  3. Sharbat Gula - Wikipedia

    en.wikipedia.org/wiki/Sharbat_Gula

    The photo, which shows a girl with a striking green eye colour, looking straight into the lens with a piercing stare, became a symbol of the Afghan conflict and the problems affecting refugees around the world. [4] The image is the only one to have been used three times on a National Geographic cover. (The first was June 1985.

  4. Afghan Girl - Wikipedia

    en.wikipedia.org/wiki/Afghan_Girl

    The image of her face, with a red scarf draped loosely over her head and her eyes staring directly into the camera, was named "the most recognized photograph" in the magazine's history, and the cover is one of National Geographic's best known. [12] American Photo magazine says the image has an "unusual combination of grittiness and glamour". [13]

  5. How Rare Are Green Eyes, Exactly? - AOL

    www.aol.com/lifestyle/rare-green-eyes-exactly...

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  6. List of redheads - Wikipedia

    en.wikipedia.org/wiki/List_of_redheads

    This list includes people with natural red hair. Red or ginger hair may come in different shades - from strawberry blond to auburn . [ 1 ] With only 2% of each country's population having red hair, [ 2 ] red is the rarest natural hair-coloration. [ 1 ]

  7. Heterochromia iridum - Wikipedia

    en.wikipedia.org/wiki/Heterochromia_iridum

    Heterochromia iridum. Heterochromia is a variation in coloration most often used to describe color differences of the iris, but can also be applied to color variation of hair [ 1] or skin. Heterochromia is determined by the production, delivery, and concentration of melanin (a pigment ). It may be inherited, or caused by genetic mosaicism ...

  8. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance . Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...

  9. Green flash - Wikipedia

    en.wikipedia.org/wiki/Green_flash

    Green beam of light either shooting up or seen immediately after sundown; usually a few degrees long, lasting several seconds. Hazy air and a bright green flash acting as a light source. Sea level. The majority of flashes observed are inferior-mirage or mock-mirage effects, with the others constituting only 1% of reports.