A B C D E F G H I K L M N O P R S T U V W X Corneal Edema Synonym(s) - Edema, Corneal Definition: An excessive amount of fluid in the cornea due to damage of the epithelium or endothelium causing decreased visual acuity. Broader term(s) Eye Diseases Corneal Diseases Corneal Edema MeSH © U.S. National Library of Medicine®.