The purpose of study. To investigate efficiency of systematic monitoring of quality of treatment of patients in the ophthalmologic surgery clinic, its impact on minimization of number of cases of deviance from treatment standards. Materials and methods. The continuous statistic observation technique was applied to analyze outcomes of surgical operations and courses of treatment on one or both eyes simultaneously in 126,258 patients implemented in the Khabarovsk branch of the inter-branch scientific and technical complex «S.N. Fedorov Microsurgery of eye» during 2012-2016. The evaluation was applied to maintenance of treatment technology and functional result. The assessment of quality of maintenance of medical documentation was implemented during analysis of 108,143 medical patient records and record charts of patients completed treatment in the Branch during 2012-2016. The results were evaluated by 5 point scale. The assessment of satisfaction of patients by quality of medical care was implemented using anonymous questionnaire survey by evaluation scale. during analyzed period 2000 questionnaires were filled out. Results. During treatment, in the most of patients (99.1%) a maximal clinical result was achieved (10 or 12 points). The deviance from standard of clinical result of treatment was established in 0.9%. The monitoring of assessment of quality of treatment of patients with subsequent clinical analysis permitted to decrease rate of deviance from standard of clinical result of treatment during analyzed period up to 21.1%; rate of intra-operational complications - up to 63.6%. The results of systemic analysis of defects of maintenance of primary medical documentation permitted to decrease their number up to 1.5 times. The degree of satisfaction with quality of treatment according the sampled sociological questionnaire surveys of treated patients turned out high - 99.7%. Conclusion. The single system of assessment of quality of treatment of patients developed in the inter-branch scientific and technical complex «S.N. Fedorov Microsurgery of eye» permits to support a high level of treatment care provision and to detect on-the-fly defects of diagnostic examination and failures in technologies of treatment.