Abstract
Context: Diabetic macular ischemia affects visual function to a variable degree. Aims: This study aims to find whether parameters of ischemia measured on optical coherence tomography angiography (OCTA) correlate with best spectacle-corrected visual acuity (BCVA). Settings and Design: A cross-sectional study was done on 33 eyes with diabetic retinopathy (DR) and 11 nondiabetic control eyes. Subjects and Methods: A 3 mm × 3 mm OCTA images of the superficial capillary plexus (SCP), intermediate capillary plexus (ICP), deep capillary plexus (DCP), and full-thickness retinal slabs were obtained and used to measure foveal avascular zone (FAZ) area and circularity index (CI) manually. Statistical Analysis Used: Statistical comparison between the diabetic and control groups and correlation with BCVA was calculated. Results: CI was significantly higher in controls in each of the SCP (P > 0.001), ICP (P > 0.05), DCP (P = 0.005), and full retinal thickness (P
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