Optical coherence tomography as diagnostic tool in ischemic macular edema of diabetic retinopathy

Abstract

DMI is recognized as an important cause of visual disability, is considered as an important clinical feature of DR. Clinically, DMI is defined by an enlargement of the (FAZ) and para macular areas of capillary non perfusion. DRIL is defined as the horizontal extent in microns for which any boundaries between the ganglion cell–inner plexiform layer complex, inner nuclear layer, and outer plexiform layer could not be identified. DRIL affecting 50% or more of the central 1-mm-widezone centered on the fovea (foveal DRIL) is associated with worse VA. OCT is a rapid, non-invasive imaging modality that uses light waves to render a cross-sectional view of the retina in vivo. It creates high-resolution images of retinal morphology allowing volumetric quantification of retinal and choroidal thickness and macular edema.OCT allows clinicians to detect macular edema in patients before retinal thickening is visible on slit lamp microscopy. This prospective study was carried on 66eyes from 66 patients (42 were male and 24 were female) divided into 3 equal groups,control group, Diabetic ischemic maculopathy and diabetic non ischemic maculopathy.