Abstract
Correlation between Retinal Nerve Fiber Layer Thickness and Cup-to- Disc Ratio in Glaucoma Suspects Using Optical Coherence Tomography at University of Port Harcourt Teaching Hospital, Port Harcourt, Rivers State, Nigeria
Highlights
Glaucoma is described as a group of diseases that have in common a characteristic optic neuropathy with associated visual function loss
Vertical cup disc ratio increased with decreasing Retinal nerve fiber layer (RNFL) thickness (p
There was no strong correlation between vertical cup disc ratio and retinal nerve fiber layer thickness among the glaucoma suspects
Summary
Glaucoma is described as a group of diseases that have in common a characteristic optic neuropathy with associated visual function loss. The prevalence of all glaucoma (open angle and angle closure) varies slightly worldwide. A higher prevalence (3.7%) was reported among the Chinese in Tanjong Pagar Singapore [5] which is probably due to the high prevalence of angle closure glaucoma among the Chinese [6]. The highest prevalence (4.2%) was reported in Africa [7] and this is likely due to the high prevalence of primary open angle glaucoma (POAG) among blacks [7,8,9]. If two or more of these findings are present, the diagnosis of POAG is supported, especially in the presence of other risk factors such as age, a family history of glaucoma and the black race. The angleclosure suspects were based on the following criteria [17]: Posterior trabecular meshwork not visible 180 degrees [18], pigmented trabecular meshwork not visible 270 degrees without indentation [19] or posterior trabecular meshwork not visible 180 degrees and IOP 22 mmHg or higher [20]
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