1. Department of Pediatric Ophthalmology and Strabismus, Medical University of Bialystok, Waszyngtona 17, 15-274 Bialystok, Poland
2. Department of Pediatric Ophthalmology and Strabismus, Waszyngtona 17, 15-274 Bialystok, Poland
3. Bialystok University of Technology, Wiejska 45A, 15-351 Bialystok, Poland