IFNG and tuberculosis: In most studies, the diagnostic criteria for presumed ocular tuberculosis were: residence or migration from the areas endemic in TB, previous history of contact with TB-infected patients, presence of suggestive ocular findings, exclusion of other known causes of ocular inflammation, corroborative evidence such as a positive TST (tuberculin skin test), positive interferon-gamma release assays (QuantiFERON), and a positive response to conventional ATT without recurrence.