optic atrophy 9 https://www.malacards.org/card/optic_atrophy_9 MEDGEN:898858 OPA9 ACO2 autosomal recessive isolated optic atrophy UMLS:C4225384 autosomal recessive isolated optic atrophy caused by mutation in ACO2 DOID:0111442 optic atrophy 9 OMIM:616289 GARD:0018199 MONDO:0014571 ACO2-related optic atrophy with or without extraocular features