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Grey eyes make up about 3 percent of the world's population—the second rarest eye color. There are also rare cases of violet and red-colored eyes. What Determines Eye Color?
According to the World Atlas, only about five percent of the world's population have hazel eyes—just behind the rarest eye color, which is green. The rarity of hazel eyes can be attributed to ...
Amber is the third-rarest natural eye color after green and gray, occurring in 5% of the world's population. [36] People with amber-colored eyes are found in Europe , and in fewer numbers in the Middle East , North Africa , and South America .
Eye color, specifically the color of the irises, is determined primarily by the concentration and distribution of melanin. Although the processes determining eye color are not fully understood, it is known that inherited eye color is determined by multiple genes. Environmental or acquired factors can alter these inherited traits. [7]
The human eye's red-to-green and blue-to-yellow values of each one-wavelength visible color [citation needed] Human color sensation is defined by the sensitivity curves (shown here normalized) of the three kinds of cone cells: respectively the short-, medium- and long-wavelength types.
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Red, an extremely rare eye color due to albinism; Red eyeshine in animals caused by tapetum lucidum; ... "Red Eye", a song by Andy Grammer from Magazines or Novels, 2014
Read moreThis is the rarest hair and eye color combination. Brown eyes, hazel eyes, green eyes, blue eyes — these are the standard shades for the windows to our soul. But which hair color most ...