Yang J, et al. - Using swept-source optical coherence tomography (SS OCT), researchers assessed the three-dimensional choroidal vascularity index (CVI) in the eyes with treatment-naïve acute central serous chorioretinopathy (CSC). OCT and OCT angiography covered an area of 12 × 12 mm centered on the fovea in this prospective cross-sectional study. The sample consisted of 32 eyes with treatment-naïve acute CSC, 18 fellow eyes, and 48 control eyes. According to findings, increased three-dimensional CVI in the eyes with CSC and in fellow eyes indicated an increased vascular component. The three-dimensional CVI is a valuable choroidal disease imaging marker that volumetrically tests the choroidal vasculature and may advance the understanding of the pathophysiology of CSC.