Dystrophy, Corneal

One of a number of inherited diseases—all potentially blinding disorders which frequently require corneal transplantation to improve visual acuity—characterized by the accumulation of abnormal material in the cornea, typically classified depending on which of the three levels of the cornea they primarily affect, including anterior corneal dystrophies (such as map-dot-fingerprint dystrophy and Reis-Bückler’s dystrophy), stromal dystrophies (such as granular, lattice, and Avellino dystrophy), and posterior corneal dystrophy (such as Fuch’s dystrophy and posterior polymorphous dystrophy or PPMD).