Iris[ī′ris, ir′i-dēz]

Type:Term

Definitions
1. The anterior division of the vascular tunic of the eye, a diaphragm, perforated in the center (the pupil), attached peripherally to the scleral spur; it is composed of stroma and a double layer of pigmented retinal epithelium from which are derived the sphincter and dilator muscles of the pupil.

Synonyms
orris

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