1. Department of Ophthalmology, Kornel Gibiński University Clinical Center, Medical University of Silesia, 40-752 Katowice, Poland
2. OPTOMED Ophthalmological Center for Children and Adults, 41-500 Chorzów, Poland
3. Department of Ophthalmology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, 40-752 Katowice, Poland