Definition
The colored portion of the eye, the iris is membrane located between the cornea and lens. Its round, central opening (the pupil) regulates the entrance of light into the eye by contracting and dilating (expanding).
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Review Date:8/11/2005
Reviewed By: Edward B. Feinberg, MD, MPH, Professor and Chair, Department of Ophthalmology, Boston University School of Medicine, Boston, MA. Review provided by VeriMed Healthcare Network.
Reviewed By: Edward B. Feinberg, MD, MPH, Professor and Chair, Department of Ophthalmology, Boston University School of Medicine, Boston, MA. Review provided by VeriMed Healthcare Network.
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