THE ETIOLOGY OF IRITIS

Abstract
This is a continuation of the study of iritis, of which a series of 100 cases was reported in 1916. The present report includes 100 cases which have been studied by the same methods as in the previous series. These included a careful history and physical examination to determine the presence or absence of syphilis, tuberculosis, gonococcal infection, and infections of the teeth, tonsils, sinuses, prostate, pelvis, or other structures which might give rise to metastatic lesions in joints or eyes. The possibility of invasion of the body by infection entering through mucous membranes without previous residence in a local lesion in the body was considered, and will be discussed below. Laboratory examinations included Wassermann tests, usually controlled by a second laboratory, complement fixation tests for gonococcal infection, roentgenograms of the teeth and sinuses, and of the lungs when there was any question of pulmonary disease. Blood counts and blood

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