Author(s):
1. Žaklina Unčanin,
Republic of Srpska, Bosnia and Herzegovina
2. Vesna Ljubojević, Medicinski fakultet Banja Luka ,
Republic of Srpska, Bosnia and Herzegovina
3. Milka Mavija, Klinika za očne bolesti UKC RS Banja Luka,
Republic of Srpska, Bosnia and Herzegovina