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  2. 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.

  3. The Rarest Eye Color in the World: What It Is and Why

    www.aol.com/lifestyle/rarest-eye-color-world-why...

    While the spectrum of eye colors is as vast as the human experience itself, ... 8-10 percent of the world's population have blue eyes. ... There are also rare cases of violet and red-colored eyes.

  4. Heterochromia iridum - Wikipedia

    en.wikipedia.org/wiki/Heterochromia_iridum

    In sectoral heterochromia, areas of the same iris contain two different colors, the contrasting colors being demarcated in a radial, or sectoral, manner. Sectoral heterochromia may affect one or both eyes. [31] It is unknown how rare sectoral heterochromia is in humans, but it is considered to be less common than complete heterochromia.

  5. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    The inheritance pattern followed by blue eyes was previously assumed to be a mendelian recessive trait, however, eye color inheritance is now recognized as a polygenic trait, meaning that it is controlled by the interactions of several genes. [56] Blue eyes are predominant in northern and eastern Europe, particularly around the Baltic Sea.

  6. If you think you have blue or green eyes, they're ... - AOL

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

    According to CNN, Dr. Gary Heiting, a licensed optometrist and senior editor of All About Vision explained why all human eyes are actually brown, no matter if they look blue or greenish.

  7. Impossible color - Wikipedia

    en.wikipedia.org/wiki/Impossible_color

    These are simultaneously dark and impossibly saturated. For example, to see "stygian blue": staring at bright yellow causes a dark blue afterimage, then on looking at black, the blue is seen as blue against the black, also as dark as the black. The color is not possible to achieve through normal vision, because the lack of incident light (in ...

  8. How Rare Are Hazel Eyes, Exactly? - AOL

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

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  9. Blue - Wikipedia

    en.wikipedia.org/wiki/Blue

    Blue eyes are also found in parts of Western Asia, most notably in Afghanistan, Syria, Iraq, and Iran. [53] In Estonia, 99% of people have blue eyes. [54] [55] In Denmark in 1978, only 8% of the population had brown eyes, though through immigration, today that number is about 11%. [55] In Germany, about 75% have blue eyes. [55]