In a previous report on the etiology of uveitis1 we stated that the importance of sarcoid and of brucellosis could not then be properly evaluated. The significance of these conditions as causes of uveitis was not appreciated until late in this previous study, and search for evidence of these diseases had not been routinely made. The previous study included patients with uveitis admitted to the Wilmer Ophthalmological Institute up to July 1, 1939. A survey of the patients with uveitis admitted from July 1, 1939 to June 30, 1943 revealed that during this period exactly 200 were completely studied, with the idea of establishing the cause of the uveal disease. Included in the general study were searches for any evidence of sarcoidosis or of brucellosis. It is the purpose of this paper to present the results of the etiologic study of these 200 patients and to discuss the general