[Stages of introduction of endonasal microendoscopic dacryocystorhinostomy into ophthalmological clinical practice].

Endonasal microendoscopic dacryocystorhinostomy has a number of important advantages over external dacryocystorhinostomy and needs to be introduced into routine practical work of all ophthalmological clinics having a dacryiologist on the staff. At the initial stage of mastering of the endonasal technique, cooperation between health-care professionals representing different disciplines, e.g. rhinologist and ophthalmologist, is of importance to ensure differential diagnosis of concomitant nasal pathologies and treatment of the affected nasolacrimal passages. At later stages, patients with lacrimal problems should be placed under the supervision of a dacryologist well trained in different surgical procedures and having an excellent knowledge of anatomical structure and physiological functions of the lacrimal apparatus as well as good understanding of mechanisms underlying its pathology.