A.E. APRELEV, N.P. SETKO, R.V. KORSHUNOVA Orenburg State Medical University, 6 Sovetskaya Str., Orenburg, Russian Federation, 460000  Aprelev A.E. — D. Med. Sc., Head of the Department of Ophthalmology, e-mail: [email protected] Setko N.P. — D. Med. Sc., Professor of the Department of hygiene of children and adolescents, e-mail: [email protected] Korshunova R.V. — postgraduate student of […]