Histologic examination revealed acid-fast organisms in a granulomatous
lesion involving the cornea of an eye of a Maximilian's Parrot. Disse
minated mycobacteriosis was also diagnosed. Antemortem attempts at det
ermining the cause of the corneal lesion had been unsuccessful. Ocular
involvement in birds with avian tuberculosis is uncommon. The corneal
lesion in the parrot was likely initiated by a dysfunctional third ey
elid.