Schnyder corneal dystrophy (SCD) is a rare form of stromal corneal dystrophy characterized by corneal clouding or crystals within the corneal stroma, and a progressive decrease in visual acuity. The disease is MONDO_0007374 (Schnyder corneal dystrophy). Also known as: SCCD, SCD, Schnyder crystalline corneal dystrophy, Schnyder crystalline dystrophy sine crystals, corneal dystrophy crystalline of Schnyder, corneal dystrophy, Schnyder type, crystalline stromal dystrophy, hereditary crystalline stromal dystrophy of Schnyder.