Diseases, dysfunctions, or disorders of or located in the iris.

The most anterior portion of the uveal layer, separating the anterior chamber from the posterior. It consists of two layers - the stroma and the pigmented epithelium. Color of the iris depends on the amount of melanin in the stroma on reflection from the pigmented epithelium.

A plant genus of the family IRIDACEAE that contains IRIP, a type-1 ribosome-inactivating protein, and iridals (TRITERPENES).