Résumé
The concern of this study is to measure the retinal nerve fiber layer thickness [RNFLT] in diabetic patients with different stages of diabetic retinopathy. Descriptive study. Sixty eyes of 48 of diabetic patients [type I and type II] attending the ophthalmology department, faculty of medicine, Suez canal university, a twenty aged matched normal subject was taken as control for RNFLT measurement by optical coherent tomography OCT. Patients were divided into three groups each consists of 20 eyes. Group 1 with mild and moderate background diabetic retinopathy [BDR], group 2 severe and very severe BDR and group 3 proliferative diabetic retinopathy [PDR]. The results of RNFLT in all stages of diabetic retinopathy indicate a marked loss mainly in the inferior and superior quadrants copared to the control group especially in all groups. Diabetes decrease RNFLT in all stages of diabetic retinopathy especially in the superior and inferior quadrants