Like most human traits, blue eyes are determined by genes, and no two people have exactly the same hue. It works a lot like individual fingerprints, making our eyes two of the most distinctive parts ...

Medically reviewed by Johnstone M. Kim, MD The iris is the colored part of the eye that controls the amount of light that enters into the eye. It is the most visible part of the eye. The iris lies in ...

The amount and type of color pigment in the iris defines eye color. In humans, phenotypically, eye color falls into one of these basic categories -brown, blue or green. Brown eyes are the most ...

By keeping the bulb in the center and orbiting the blue gel (for the iris) and the opaque disk (for the pupil) around the bulb, the eye can appear to gaze in different directions. By adjusting the ...

This little one is a doll, but as it turns out, her eyes are more unique than previously thought. All kittens, including Maine Coons, are born with blue eyes, but the pigment "binds with the iris" ...