Eye color - interesting facts

Brown
*Between 55 and 79 percent of people worldwide have brown eyes.
*Brown is the most common eye color.
*Dark brown eyes are most common in Africa, East Asia, and Southeast Asia.
*Light brown eyes are found in West Asia, the Americas, and Europe.

Blue
*Between 8 and 10 percent of people worldwide have blue eyes.
*Blue eyes are most common in Europe, especially Scandinavia.
*People with blue eyes have the same genetic mutation that causes eyes to produce less melanin.
*The mutation first appeared in a person living in Europe about 10,000 years ago. That individual is a common ancestor of all blue-eyed people today.
*You might see better at night if you have blue eyes, but you might also have more trouble with glare.

Green
*About 2 percent of people have green eyes.
*Green eyes are most common in Northern, Central, and Western Europe.
*About 16 percent of people with green eyes are of Celtic and Germanic ancestry.
*The iris contains a pigment called lipochrome and only a little melanin.

Hazel
*Approximately 5 percent of people have hazel eyes.
*Hazel eyes are uncommon, but can be found throughout the world, especially in Europe and the United States.
*Hazel is a light or yellowish-brown color with specks of gold, green, and brown in the center.
*People with hazel eyes have almost as much melanin as those with brown eyes, but it’s mostly around the edge of the iris instead of the center.

Amber
*About 5 percent of people around the world have this rare eye color.
*Amber eyes are uncommon, but can be found throughout the world.
*Amber is a golden yellow or coppery color without specks of gold, green, or brown.
*The iris contains mostly the pigment lipochrome and not much melanin.
*Amber eyes are a lot more common in dogs, fish, and birds.

Gray
*Less than 1 percent of people have gray eyes.
*Gray eyes are very rare.
*Gray eyes are most common in Northern and Eastern Europe.
*Scientists think gray eyes have even less melanin than blue eyes.
*Gray eyes scatter light differently, which makes them pale.

Heterochromia
*If you have heterochromia, all or part of one of your irises is a different color than the other one.
*This condition is seen in less than 1 percent of people, but it’s frequently seen in dogs.
*It can be the result of:
heredity
problem during eye development
an eye injury
a medical condition



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