S.F. Shkol’nik, A.Yu. Vasil’eva Cheboksary branch of S. Fedorov Eye Microsurgery Federal State Institution, 10 Traktorostroiteley Pr., Cheboksary, Russian Federation, 428028  Shkol’nik S.F. — PhD (medicine), Head of the Dacryology group, Head of the Operating unit, e-mail: s_shkolnik@mail.ru, ORCID ID: 0000-0002-3495-1598 Vasil’eva A.Yu. — ophthalmologist of the 3rd Ophthalmology Department, member of the Dacryology group, […]