The relationship between perifoveal outer retinal thickness and perifoveal vessel density in the superficial vascular complex (SVC, Top), intermediate capillary plexus (ICP, Middle), and deep capillary plexus (DCP, Bottom). Scatter plots were generated from retinitis pigmentosa (RP) patients with history of cystoid macular edema (CME, red) and without history of CME (No CME, blue). Spearman’s rho and p values of the slope are based on Spearman’s rank correlation test. No significant correlation was observed between the SVC and the outer retinal thickness. Moderate/strong correlations were found between the ICP/DCP vessel densities and outer retinal thickness in RP eyes without CME but not in patients with CME.