Пинар Ч. Оздаль, Илкнур Тугал-ТуткунPinar Ç. Özdal, Department of Ophthalmology, University of Health Sciences, Ulucanlar Eye Research and Training Hospital, Ankara, Turkey, Ilknur Tugal-Tutkun*, Department of Ophthalmology, Istanbul University Faculty of Medicine, Istanbul, Turkey, e-mail: itutkun@istanbul.edu.tr