1. Department of Ophthalmology, Trauma Centre, St. Barbara Hospital, Sosnowiec, Poland
2. Optegra Clinic in Poznań, Poznań, Poland
3. Department of Histology, Cytophysiology and Embryology, Faculty of Medicine, Academy of Silesia, Katowice, Poland
4. Chair and Clinical Department of Ophthalmology, Division of Medical Science in Zabrze, Medical University of Silesia in Katowice, Zabrze, Poland