1. 2nd Department of Ophthalmology, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland
2. K. Marcinkowski University Hospital in Zielona Góra, 65-046 Zielona Góra, Poland
3. Scientific Association of Students, 2nd Department of Ophthalmology, Pomeranian Medical University in Szczecin, Powstańców Wielkopolskich 72, 70-111 Szczecin, Poland