Leber hereditary optic neuropathy and dystonia (LDYT) is a maternally-inherited mitochondrial disorder characterized by variable combinations of visual loss and progressive generalized dystonia. LDYT is a unique oxidative phosphorylation disorder caused by mutations in mitochondrial DNA.
A mitochondrial DNA mutation at nucleotide pair 14459 of the NADH dehydrogenase subunit 6 gene associated with maternally inherited Leber hereditary optic neuropathy and dystonia.