The iris is the colored part of the eye. A circular muscle in the iris controls the amount of light that enters the eye through the pupil.
Pigment cells (melanin) in the iris produce its color. Each person's irises have a distinct color, texture, and pattern.
eMedicineHealth Medical Reference from Healthwise
To learn more visit Healthwise.org
© 1995-2012 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.