Age-related distribution of mean choroidal thickness (MCT), choroidal vessel volume (CVV), choroidal stromal volume (CSV), and choroid vascularity index (CVI). (A, C, E, G) Correlation between age and choroidal metrics was analyzed through Pearson’s correlation analysis. (B, D, F, H) Distribution of choroid metrics with a series of age groups. (*, P<0.05, two-tailed t-test).