Affiliation: | (1) Department of Ophthalmology, University of Tripoli, Tripoli Eye Hospital, Tripoli, Libya;(2) Department of Ophthalmology, Queens University Belfast, Royal Victoria Hospital, Grosvenor Road, Belfast, Northern Ireland;(3) Dept. of Ophthalmology, Eye and Ear Clinic, Royal Victoria Hosspital, BT12 6BA Belfast, Northern Ireland |