Quantitative evaluation of the topographical maps of three-dimensional choroidal vascularity index in gestational diabetes mellitus: a cross-sectional observational study

Macular grid CCP-VD increased overall in pregnancy versus NC.In pregnancy, GDM exceeded PC at higher age or AL.3D-CVI differed only in macular grid and nasal-superior, lower in GDM than NC yet not from PC.Given the structural differences between mild-to-moderate GDM and PC may be subtle.3D-CVI may serve as an auxiliary indicator for regional choroidal remodeling, and combined with CCP, it can comprehensively assess the choroidal pathophysiology in GDM.Longitudinal gestation-to-postpartum follow-up is needed.