However, it can also be caused by an eye injury or a medical condition. Heterochromia is the result of a genetic mutation caused by variations in the distribution and concentration of melanin. Like red eyes, heterochromia is rare and effects less than 1% of the population. Albinism happens when there is a problem with one of the genes inherited from the mother. Only 1% of people have pink and pale red eyes they are typically albinos. They are most common in Northern and eastern Europe. Green eyes originate from areas around the Caucasus Mountains.Īround 3% off people in the world have grey eyes. People are not born with green eyes they usually develop at around 6 months old. The answer is green, according to the American Academy of Ophthalmology (AAO). Green eyes affect around 2% of people worldwide however, they make up 86% of the population in Ireland and Scotland. At some point, you’ve probably wondered what the rarest eye color is. Light brown eyes are most common in West Asia, America and Europe. According to World Atlas, 8% - 10% of people in the world have blue eyes.īetween 55% to 79% of people have brown eyes with dark brown eyes being most prominent in Africa, East Asia, and South East Asia. They believe that the first person to have blue eyes had a genetic mutation that caused the body to reduce its melanin production.īlue eyes are most common in the UK, Ireland, Finland and Sweden.
Scientists believe that thousands of years ago, everybody in the world had brown eyes. Rare eye colours originate from genetic mutations. Heterochromia is also in <1% of the population.Where do rare eye colours originate from? Heterochromia this refers to people with two different colored eyes it can occur at birth or due to injury, medication or illnesses. The lack of pigmentation exposes the blood vessels underneath and appear to be red or violet less than 1% of the world’s population has this condition also known as albinism.Ģ. Red or violet eyes which occur because of a lack of pigmentation in the eye. The American Academy of ophthalmology (AAO) surveyed Americans to find out how prominent certain eye colors were:Īside from the traditional eye colors people can also have what are known as:ġ.
People in these regions tend to develop more melanin. In comparison, darker eyes and skin color are more common in warmer southern regions.
People in northern countries tend to have lighter colored eyes and skin. As humans begin to migrate around the globe traits in humans begin to change.
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