الفهرس | Only 14 pages are availabe for public view |
Abstract Amongst various ocular complications caused by DM, diabetic macular edema (DME) is a leading cause of severe visual loss in patients with diabetic retinopathy (Browning and Fraser 2005). DME is diagnosed with ophthalmoscopy or stereoscopic biomicroscopy as defined by the Early Treatment Diabetic Retinopathy Study (ETDRS) Research group (1985).These methods do not give an objective quantitative measurement of DME. Fluorescein angiography (FA) can explain some dynamics of the pathophysiological aspects of DME but it is an invasive technique. OCT is a non invasive technique which shows us the anatomical structures of the retina such as the extent of the retinal thickening. The aim of this study was to correlate the mean macular thickness, using optical coherence tomography, to the Snellen’s visual acuity in diabetic patients. This study was carried out on 100 eyes. All of them have early non proliferative diabetic retinopathy (mild and moderate) with and without macular edema. Patients were excluded in the current study if they had macular edema due to causes other than diabetic retinopathy, media opacity making optical coherence tomography imaging impossible such as vitreous hemorrhage and cataract and if they had epiretinal membrane and traction at the macula and Patients with neurosensory detachment. Patients were subjected to detailed ophthalmic evaluation including best corrected Snellen’s visual acuity, slit lamp examination, fundus biomicroscopy. Measurement of mean macular thickness using optical coherence tomography (OCT). There was a statistically significant negative correlation between mean macular thickness and best corrected visual acuity (decimal) and a statistically significant association between visual acuity and moderate non proliferative diabetic retinopathy. |