Due to variations in melanin, eye color runs the gamut from very light blue to very dark brown. Green irises (the rarest eye color) have less melanin than brown eyes but more than blue eyes, for ...

Due to variations in melanin, eye color runs the gamut from very light blue to very dark brown. Green irises (the rarest eye color) have less melanin than brown eyes but more than blue eyes, for ...

If your eyes have changed color and it’s not related to any of the reasons listed above, you may need to see a doctor. There are many health-related conditions that can cause issues with the eyes.

Brown eyes contain a lot of melanin, while green and hazel eyes contain a bit less. And blue eyes contain very little melanin in the front layer of the iris. That results in more blue light ...

Although brown eye color is thought to be dominant to blue, Stevens emphasized that we have two copies of each gene — one from each parent — and multiple genes are involved in determining eye ...

Green is also the rarest eye color in America. A 2014 survey by the Academy found that 45 percent of Americans had brown eyes, 27 percent had blue eyes, 18 percent had hazel eyes and nine percent ...

People with green or hazel eyes have light brown pigment in their eyes. As babies are exposed to sunlight, those specialized cells—the melanocytes—become more active, producing more melanin ...

Exactly how is a person's eye color determined? It depends on the amount, type and distribution of melanin, or pigment, in the iris of the eye, a genetics expert reveals — and more.