Polymorphous posterior corneal dystrophy HP:0007915 This corneal dystrophy affects the posterior limiting membrane of the cornea and is characterized by polymorphous plaques of calcium deposits in the deep stromal layers of the cornea, and occasionally by vesicular lesions of the endothelium and edema of the deep corneal stroma. SNOMEDCT_US:29504002 UMLS:C0339284 Abnormal migration of corneal endothelium Reduced number of corneal endothelial cells