Zain Elabdeen, R. H. and Ibrahim, S. M. (2019) “Clinical Study of Vertical Strabismus Among Patients Attending Squint Clinic –Makkah Eye Hospital –Khartoum”, International Research in Medical and Health Sciences, 2(5), pp. 1-19. doi: 10.36437/irmhs.2019.2.5.U.