She X, et al. - Experts assessed the reliability of vessel density measurements in the peripapillary retina using optical coherence tomography angiography (OCT-A) and evaluated the association with retinal nerve fiber layer (RNFL) thickness in healthy subjects. Good repeatability and reproducibility by OCT-A in the peripapillary retina were demonstrated by vessel density measurements. Findings suggested a positive relation between the vessel density to RNFL thickness and negative relation with optic disc area and rim area.