Update on choroidal vascular imaging using optical coherence tomography

The choroid being the most vascular tissue plays an important role in nutrition of outer retinal structures as well as the visual function. Recent literature provides information about the choroidal thickness and its change in various chorioretinal diseases. Detailed assessment of choroidal vasculature is yet to be explored. This review evaluates the undergoing research in choroidal vascular imaging using various optical coherence tomography techniques such as en-face, phase variance, and swept-source. The authors also discuss automated segmentation of choroidal vessels and its application in choroidal assessment as well as future directions.