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There is evidence that as many as 16 different genes could be responsible for eye color in humans; however, the main two genes associated with eye color variation are OCA2 and HERC2, and both are localized in chromosome 15. [10] The gene OCA2 (OMIM: 203200), when in a variant form, causes the pink eye color and hypopigmentation common in human ...
The original Martin scale, summarized below, consists of 16 colors (from light blue to dark brown-black) that correspond to the different eye colors observed in nature due to the amount of melanin in the iris. The numbering is reversed in order to match the Martin–Schultz scale, which is still used in biological anthropology. In this case ...
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On the other hand, brown is the most common eye color. According to the American Academy of Ophthalmology (AAO), more than half of all people have brown eyes! The AAO says that it’s an inherited ...
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A study of 1,023 students in Chile found that the most common eye color was brown-black: 71 to 89.4% and the most common hair color was brown from 65.8% to 66.8%. [8] In Spain, 57% are brown (7% of Spaniards are naturally blonde, 26% brunette, 3% redhead and the remaining 10% dark and light brown). [9]
Your eye color could mean way more than a simple genetic pigmentation.
Central heterochromia is also an eye condition where there are two colors in the same iris; but the arrangement is concentric, rather than sectoral. The central (pupillary) zone of the iris is a different color than the mid-peripheral (ciliary) zone. Central heterochromia is more noticeable in irises containing low amounts of melanin. [32]