Homozygous and compound heterozygous variants in SLC4A11 cause congenital hereditary endothelial dystrophy (CHED, formerly CHED2) [3,4] and Harboyan syndrome, which combines corneal dystrophy with sensorineural deafness [5,6,7]. The gene discussed is SLC4A11; the disease is congenital hereditary endothelial dystrophy of cornea.