O.R. Shangina - Dr.Sc. (Biol.), Leading Research Scientist, FSBI «Russian Eye and Plastic Surgery Centre» of the Russian Federation Ministry of Health, Ufa, Russia. E-mail: alloolga@mail.ru L.A. Musina - Dr.Sc. (Biol.), Leading Research Scientist, FSBI «Russian Eye and Plastic Surgery Centre» of the Russian Federation Ministry of Health, Ufa, Russia. E-mail: morphoplant@mail.ru L.A. Bulgakova - Ph.D. (Biol.)., Research Scientist, FSBI «Russian Eye and Plastic Surgery Centre» of the Russian Federation Ministry of Health, Ufa, Russia