كلية علوم البصريات
Permanent URI for this communityhttps://repository.neelain.edu.sd/handle/123456789/613
Browse
3 results
Search Results
Item CROWDING PHENOMENON (In Unilateral Aniso-hypormotropic Amblyopia) (Analytlcal Study(ALNeelain University, 2008) Mustafa Gamar Eldin Bashir Haj AhmedACKNOWLEDGEMENT 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.Item Theffect of redued binocular visual Acuitt on stereoacuity(AL-Neelain University, 2002-09) EL-BASHIR ‘EL-SAEED EL-BASHIRAbstract This study investigated the effect of optical blur (defocus) on stereoacuity measured by Titmus stereotest. 1n 60 subjects (30 males and 30 females) with nomqal visual acuity and demonstrated near stereoacuity of 40 seconds of arc. Ages enrolled were from 18 to 36 years. The subjects were selected randomly from Faculty of Optometry and Visual Science Clinic (In Khartoum). All subjects were enrolled in the experiment, in which the visual acuity of each subject was blurred (positive and negative blur was conducted), by (1,2 and 3D.Sph) lenses first binocularly and second monocularly, then the stereoacuity was measured by using Titmus stereotest. The drop of stereoacuity was found to be greater with monocular than binocular blur. The average drops due to binocular blur were found to be 49.7 seconds (of arc) with -1.00 D.Sph, 54.2 seconds with -2.00 D.Sph, 189.2 seconds. with -3.00 D.Sph, 50 seconds with +1.00 D.Sph, 260.8 seconds with +2.00 D.Sph and 2180.3 seconds with +3.00 D.Sph. The average drops of monocular blur were 143.8 seconds with —1.00 D.Sph, 1333.7 seconds with —2.00 D.Sph, 2712.3 seconds with -3.00 D.Sph, 92.2 seconds with +1.00 D.Sph, 1701.7 seconds with +2.00 D.Sph and 3000 seconds with +3.00 D.Sph. From this study the positive optical blur was found to cause more drop in the sterescopic acuity than negative optical blur. Key words: Visual acuity, binocular vision, stereoacuity, optical blurs.Item The Effect of UV and Temperature on Darkening Photochromic Lenses(Al-Neelain University, 2009) Sayed Fadol Sayed