NCIt definition : The colored disc of the eye composed of connective tissue, epithelium, and endothelium.
It separates the anterior chamber from the posterior chamber.;
Alternative definition : NCI-GLOSS: The colored tissue at the front of the eye that contains the pupil in the
center. The iris helps control the size of the pupil to let more or less light into
the eye.; CDISC: The tissue in the eye that separates the anterior chamber from the posterior
chamber.;