Orphanet rare-disease nomenclature identifier Orphanet_98961 (Reis-Bücklers corneal dystrophy) (RBCD), also known as granular corneal dystrophy type III, is a rare form of superficial corneal dystrophy characterized by bilateral symmetrical reticular opacities in the superficial central cornea, with progressive visual impairment. Also known as: Anterior limiting membrane dystrophy type I, Atypical granular corneal dystrophy, Corneal dystrophy of Bowman layer type I, Geographic corneal dystrophy, Granular corneal dystrophy type III, RBCD, Superficial granular corneal dystrophy.