Iris

iris (i´ris) pl. i´rides   [Gr.] the circular pigmented membrane behind the cornea, perforated by the pupil.

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i·ris (rs)

n. pl. i·ris·es or i·ri·des (r-dz, r-)

The round pigmented contractile membrane of the eye that is perforated in the center by the pupil, forms the front part of the vascular tunic, and is attached on the margin to the ciliary body.

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iri·dal (r-dl, r-), i·ridi·al (-rd-l, -rd-), i·ridi·an adj.

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Iris (plural, irides)

The circular pigmented membrane behind the cornea of the eye that gives the eye its color. The iris surrounds a central opening called the pupil.

Mentioned in: Eye Cancer, Eye Examination, Glaucoma, Hyperopia, Radial Keratotomy, Retinal Vein Occlusion, Trabeculectomy, Uveitis, Vitiligo

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iris,

n a circular, contractile disc suspended in aqueous humor between the cornea and the crystalline lens of the eye and perforated by a circular pupil. It regulates the amount of light passing into the chambers of the eye.

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Iris

a European plant genus of the Iridaceae family; contain cardiac glycosides. Cause sudden death, diarrhea. Includes I. foetidissima (wild iris), I. germanica (cultivated iris), I. missouriensis, I. pseudacorus (yellow flag), I. versicolor.