Uveitis is a heterogeneous polyetiological immune-mediated disease. Its common feature is inflammation of the choroid. The total prevalence of uveitis of various etiologies in the population varies from 15 to 38 people per 100 000. The cause of this pathology can be any infectious or somatic diseases (both endo- and exogenous in nature), when the body’s immune system is activated. The prevalence of the most common endogenous uveitis, caused by secondary foci of infection, is about 3% of the total number of diseases of this etiology. Uveitis, caused by Streptococcus bacteria, affects eyes due to dissemination from the foci of infection, being transmitted through the blood and lymph vessels. An important stage in the clinical diagnosis of uveitis is the determination of the etiological factor, which allows using of pathogenetic treatment regimens. The diagnosis is performed based on the totality of signs characterizing the specificity of the inflammatory process. Treatment and diagnosis of inflammation of the choroid are still one of the urgent tasks of modern ophthalmology.