<unk>  (PPCD; sometimes also Schlichting dystrophy) is a type of corneal dystrophy, characterised by changes in Descemet's membrane and endothelial layer. Symptoms mainly consist of decreased vision due to corneal edema. In some cases they are present from birth, other patients are asymptomatic. Histopathological analysis shows that the cells of endothelium have some characteristics of epithelial cells and have become multilayered. The disease was first described in 1916 by Koeppe as keratitis bullosa interna.
Posterior polymorphous corneal dystrophy
Granular corneal dystrophy
Lattice corneal dystrophy
Subepithelial mucinous corneal dystrophy
Macular corneal dystrophy
Schnyder crystalline corneal dystrophy
Meesmann corneal dystrophy
Neurotrophic keratitis