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The scale consists of 20 colors [1] (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 (in this case, the lower the number, the lighter the eye color): [2] [3] 1-2: blue iris (1a, 1b, 1c, 2a : light blue iris - 2b: darker blue iris) 3: blue-gray iris
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 ...
Eye height is between 1 + 1 ⁄ 8 to 1 + 3 ⁄ 8 inches (29 to 35 mm) from the bottom of the photo; Front view, full face, open eyes, closed mouth, and neutral expression; Full head from the top of the hair to the shoulders; Plain white or off-white background; No shadows on the face or in the background; No sunglasses (unless medically necessary).
With brown eyes taking an overwhelming lead, all of the other eye colors have lower percentages. According to WorldAtlas , 8-10 percent of the world's population have blue eyes.
Countries typically choose colors that pay tribute to their culture, politics, or faith, Claire Burrows of De La Rue, a British passport-making company, told the Economist.
Eye color is an inherited trait determined by multiple genes. [14] [15] These genes are sought by studying small changes in the genes themselves and in neighboring genes, called single-nucleotide polymorphisms or SNPs. The total number of genes that contribute to eye color is unknown, but there are a few likely candidates.
RELATED: See what your eye color says about you. What your eye color says about you. Show comments. Advertisement. Advertisement. Holiday Shopping Guides. See all. AOL.
Visual acuity with Distant chart with correctors Visual acuity with eye chart at Distant 20 feet (6 m) and with (cc: Latin cum correctore) correctors (spectacles); Dsc is without (sc: Latin sine correctore) correctors. See Visual_acuity#Legal_definitions: VA Nsc - VA Ncc Visual acuity with Near chart without correctors