(ALNeelain University, 2008) Mustafa Gamar Eldin Bashir Haj Ahmed
ACKNOWLEDGEMENT
Gratitude and thankfulness to:
0 Professor Hashim Mangiel the supervisor of this study I owed him much for
his atmost attention, guidance, information he oflered regarding the study and
firm directions to be on the way of research..
0 Dr. Mohamed Alhassan Ali Alawad, Dean Faculty of Optometry & Visual
Science for his kind welcoming open doors, and useful instructions to build up
a research.
0 Thanks & gratitude to stafi’ of the Graduate College of the University of Al-
Neelain for the facilities they gave and assistance.
0 Colleagues and library stafl of the Faculty of Opt. & Visual Science for their
endless cooperation and help.
Q Subjects of the study for their patience, cooperation, and immediate consent to
bear the burden of the examinations.
I Many thanks to everyone who gave a hand, to realize this study; I consider
them anyhow, as participants in the creation of this study.
0 Special thanks to Dr. F arouk Suliman for his incredible help and guidance.
