A B C D E F G H I K L M N O P R S T U V W X Iris Diseases Synonym(s) - Disease, Iris Definition: Diseases, dysfunctions, or disorders of or located in the iris. Broader term(s) Eye Diseases Uveal Diseases Iris Diseases See also Aniridia Exfoliation Syndrome Iridocyclitis Iris Neoplasms Iritis MeSH © U.S. National Library of Medicine®.