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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.
Waardenburg syndrome is a group of rare genetic conditions characterised by at least some degree of congenital hearing loss and pigmentation deficiencies, which can include bright blue eyes (or one blue eye and one brown eye), a white forelock or patches of light skin.
Out of the conventional eye colors we'd think of—brown, blue, hazel and green—green is the rarest of the four. Only about two percent of the world's population has naturally green eyes ...
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.
Red eyes are the rule when it comes to periodical cicadas' eye color. Here's more information on blue-eyed cicadas and white cicadas. How rare is a blue-eyed cicada?
But, how rare are hazel eyes? ... Hazel eyes tend to change colors due to Rayleigh scattering—the same factor that makes the sky appear blue. This optical effect occurs in the stroma, which is a ...
A new study reports that the type of lemur that has stunning eyes could be extinct in a little more than a decade. Skip to main content. 24/7 Help. For premium support please call: 800-290 ...
Ojos Azules (Spanish: [ˈoxos aθˈules], 'Blue Eyes') was a breed of shorthaired [1] [2] domestic cat with unusual blue or odd eyes [1] caused by a dominant blue eye (DBE) genetic mutation. The breed came in all coat colors; however, only particolors ( bicolors and tricolors ), colorpoints , and intermediate colors with a characteristic white ...