“…Known autoimmune diseases etiologies of OPN include sarcoidosis (10,11), GAP (12, 13), giant cell arteritis (14, 15), Crohn's disease (16), IgG-4 (17), Behcet's disease (9), and SLE (2). Infectious etiologies of OPN have been associated with acute retinal necrosis (18), syphilis (19,20), herpes zoster (21), tuberculosis (22,23), and Mycoplasma pneumoniae (24). In our study we found the primary causes of OPN were Graves' diseases (12), IgG-4 (10), GPA (4), SLE (2), sarcoidosis (1), Rheumatoid arthritis(1), scleroderma (1), Behcet's disease (1), gout (1), tuberculosis (5), sparganosis (1), ocular Toxoplasmosis (1), bacterial meningitis (1), fungal meningitis (1), and Cytomegalovirus (1).…”