Contrast Sensitivity And Colour Vision As Diagnostic Tools In Primary Open angle Glaucoma

Abstract

Abstract 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.