Green eyes are rare, with only 2% of the population having them. People from Northern Europe and Nordic countries are more likely to have them due to reduced melanin production. A genetic mutation 6,000 to 10,000 years ago introduced blue, green, and hazel eyes.
Green eyes are one of the least common eye colors, with only about 2% of the world’s population estimated to have green eyes. People from Northern Europe and Nordic countries like Finland or Iceland are more likely to have green eyes. This is thought to be because their genetics are prone to a reduced production of melanin, the pigment produced by cells responsible for the dark appearance of skin, hair and eyes. Some scientists believe that all humans originally had brown eyes and a genetic mutation that occurred about 6,000 to 10,000 years ago that affected the production of melanin and led to the introduction of blue eyes and other variations, such as green or hazel.
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A complete lack of melanin will result in red eye, which is seen in people who have a severe form of albinism or lack of pigment.
It is estimated that up to 40% of all Europeans have blue eyes.
In the early 1900s, about half of all babies born in the United States had blue eyes. As of 2006, only one in six Americans have blue eyes, the most common being brown eyes.
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