What determines the shade of your peepers? Experts weigh in on the rarest eye color in the world—and the genetics behind it.

The vast majority of people in the world have brown eyes. The second most common color is blue, but people can also have hazel, green, or gray eyes. According to a 2020 study, 79% people worldwide ...

According to the World Atlas, about 90% of the global population ... According to a 2014 American Academy of Ophthalmology survey, green eyes are the rarest. Only 9% of Americans have green ...

Unlike more common eye colors like brown, which is the dominant color and makes up about 80% of the world's population, or blue and green, gray eyes require a confluence of complex genetic ...