"Green eyes are typically a result of a combination of a moderate amount of melanin [the substance that produces eye, skin and hair pigmentation] and the scattering of light in the iris," he added ...

People with blue eyes have brown pigment underneath their iris and blue eyes tend to be more sensitive to light, the doctor says in the post. The ophthalmologist also said that not all babies are ...

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 ...

Eye color is polygenic—controlled by multiple genes—not monogenic. Most human populations have brown eyes, while blue and green eyes occur almost exclusively in people of European descent.

Heterochromia is a variation in iris pigmentation that causes the eyes to have different colors ... For example, a green iris with a hazel patch. This characteristic is often subtle.

You can also change the iris color with implants, where a cut is made in the eye by the cornea, and an artificial iris is unfolded and placed to cover the natural iris.

Regardless of how they look, all human eyes are in fact brown at their core, with the reflection of light determining the color we see in them.