1. Faculty of Mathematics and Computer Science, University of Warmia and Mazury, 10-710 Olsztyn, Poland
2. Department of Ophthalmology, Poznan City Hospital, 61-285 Poznań, Poland
3. Faculty of Design, SWPS University of Social Sciences and Humanities, Chodakowska 19/31, 03-815 Warsaw, Poland
4. Institute for Research in Ophthalmology, Foundation for Ophthalmology Development, 60-836 Poznań, Poland