كلية علوم البصريات
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Item Contrast Sensitivity And Colour Vision As Diagnostic Tools In Primary Open angle Glaucoma(Neelain University, 2008) Ahmed Ali Ahmed ElnimryAbstract This is the first clinical study of its kind in Sudan. The purpose of this study is to investigate primary open angle glaucoma by contrast sensitivity and colour vision. Current data consist of (200 sample).There were divided into two groups. Group (A) Comtrol group (100 subjects), their ages ranged between (40 -55) years. Group (B) test group (100 subjects) with family history of glaucoma, their ages ranged between (30 -40) years. Clinical investigation of glaucoma in this study started in June 2004 - July 2006 at Makka Eye Complex Clinic in Khartoum. Functional tests included: vision test - refraction and correction - ophthalmoscopy - tonometry - perimetry - gonioscopy - contrast sensitivity test by Lea Symbol Chart - Colour vision test by (colour vision test made easy) Stoical analysis of data as follows: The results revealed that contrast sensitivity was low in glaucoma about 100% in group (A) The results revealed that contrast sensitivity was low in about 14% in group (B), because the cause is a family history of glaucoma. The results revealed that contrast sensitivity was normal in about 86% in group (B). The correlation between contrast sensitivity and Ovisual field in early and moderate defects was significant. The correlation and Chi-Square with contrast sensitivity and cup disc ratio - IOP - gonioscopy was weak (positive or negative). In addition there were significant relation between contrast sensitivity and refractive state of the eye. The results revealed that, there was not any relation between colour vision and glaucoma in this stage. Contrast sensitivity recommended as a diagnostic tool in primary open angle glaucoma. Keywords: Contrast sensitivity test - Lea symbol chart - Colour vision test - colour _vision test made easy - Primary open angle glaucoma - test group - Control group.Item Contrast Sensitivity And Colour Vision As Diagnostic Tools In Primary Open angle Glaucoma(Neelain University, 2004) Ahmed Ali Ahmed ElnimryAbstract This is the first clinical study of its kind in Sudan. The purpose of this study is to investigate primary open angle glaucoma by contrast sensitivity and colour vision. Current data consist of (200 sample).There were divided into two groups. Group (A) Comtrol group (100 subjects), their ages ranged between (40 -55) years. Group (B) test group (100 subjects) with family history of glaucoma, their ages ranged between (30 -40) years. Clinical investigation of glaucoma in this study started in June 2004 - July 2006 at Makka Eye Complex Clinic in Khartoum. Functional tests included: vision test - refraction and correction - ophthalmoscopy - tonometry - perimetry - gonioscopy - contrast sensitivity test by Lea Symbol Chart - Colour vision test by (colour vision test made easy) Stoical analysis of data as follows: The results revealed that contrast sensitivity was low in glaucoma about 100% in group (A) The results revealed that contrast sensitivity was low in about 14% in group (B), because the cause is a family history of glaucoma. The results revealed that contrast sensitivity was normal in about 86% in group (B). The correlation between contrast sensitivity and Ovisual field in early and moderate defects was significant. The correlation and Chi-Square with contrast sensitivity and cup disc ratio - IOP - gonioscopy was weak (positive or negative). In addition there were significant relation between contrast sensitivity and refractive state of the eye. The results revealed that, there was not any relation between colour vision and glaucoma in this stage. Contrast sensitivity recommended as a diagnostic tool in primary open angle glaucoma. Keywords: Contrast sensitivity test - Lea symbol chart - Colour vision test - colour _vision test made easy - Primary open angle glaucoma - test group - Control group.Item Anisometropic Amblyopia And Contrast Sensitivity Function at Al Walidain Eye Hospital(AL-Neelian University, 2009) Mariam Osman Mohammed AliAbstract The study aimed to detect the affect of anisometropic amblyopia on contrast sensitivity function at Al Walidain Eye Hospital during the period from August to October 2008. Fifty patients, (46%) males and (54%) females were recruited and investigated clinically. Virbal conscent was taken from every patient, their age ranged between 15-35 years. The subjects were students and workers. Data was collected using a specially designed data form which included: age, gender, symptoms, patient and family history, cover test, ocular motility, external eye examination, fundus examination, refraction and contrast sensitivity function test. Statistical analysis of data was done using SPSS (10.0) and the result obtained were presented in form of tables and graphs. The contrast sensitivity function in the amblyopic eye was affected compared to the other eye. The correlation between visual acuity and contrast sensitivity was highly positive ( r = 0.464 ) regardless of the patent’s age. The contrast sensitivity function was more reduced in amblyopic patients with anisohypermetropia than those with anisomyopia or astigmatism. Key words Anisometropia. Amblyopia, Contrast Sensitivity Function, Visual Acuity. الخلاصــة كسل العين الناتج عن اختلاف الانكسار بين العينين ووظيفة حساسية التباين هدفت هذه الدراسة إلى اكتشاف أثر كسل العين الناتج عن اختلاف الانكسار بين العينين على وظيفة حساسية التباين بمستشفى الوالدين للعيون في الفترة من اغسطس الى اكتوبر من العام 2008م. خمسون مريضاً 46% ذكور و 54% أناث تم إختيارهم وإخضاعهم للفحص، تراوحت أعمارهم بين 15-35 سنة. تم جمع البيانات باستخدام تصميم لفورمة طبية تضمنت العمر، النوع، التاريخ المرضي وشكوى المريض، فحص أجزاء العين الداخلية والخارجية، قياس الخطأ الإنكساري للعينين وقياس وظيفة حساسية التباين. تم تحليل البيانات إحصائياً باستخدام برنامج (SPSS (10.0 وتم وضع النتائج في جداول ورسومات بيانية. كان هناك تأثير على وظيفة حساسية التباين في العين المصابة بكسل العين الوظيفي مقارنة بالعين الغير مصابة. حيث أوضحت الدراسة وجود علاقة بين حدة الإبصار ووظيفة حساسية التباين في كل الفئات العمرية. أوضحت الدراسة أن من أكثر مسببات الإصابة بكسل العين الوظيفي الناتج عن إختلاف الإنكسار بين العينين هو طول النظر حيث بلغ 52% من مجموع المرضى أما قصر النظر بلغ 28% واللانقطي 20%. وظيفة حساسية التباين كانت أقل عند الأشخاص الذين يعانون من كسل العين الوظيفي الناتج عن طول النظر أكثر منه عند الأشخاص الذين لديهم قصر نظر أو اللانقطي. كلمات مفتاحية: اختلاف الانكسار بين العينين ، كسل العين ، وظيفة حساسية التباين ، حدة الابصار.