Aniridia-intellectual disability syndrome (Orphanet rare-disease nomenclature identifier Orphanet_1068) is an extremely rare autosomal dominant developmental defect of the eye described in several members of one family that is characterized by the association of moderate intellectual disability with aniridia, lens dislocation, optic nerve hypoplasia (see this term) and cataracts. There have been no further descriptions in the literature since 1974. Also known as: Walker-Dyson syndrome.