Effects of age and binarising area on choroidal vascularity index in healthy eyes: an optical coherence tomography study

摘要

urpose To investigate the changes in the choroidal vascularity index (CVI) with age and to compare the effect of the binarised area on CVI in healthy eyes using spectral-domain optical coherence tomography (SD-OCT).Materials and methods Two hundred and twenty-four eyes of 224 healthy subjects were included in this prospective cross-sectional study. The eyes were divided into different age groups to analyse the possible age-related choroidal structural changes. Subfoveal choroidal thickness (SFCT), CVI, total choroidal area (TCA), stromal area (SA), luminal area (LA), and CVI within the central 1500 lm of the macula were analysed using enhanced depth imaging SD-OCT. The CVI was defined as the proportion of the LA to the TCA, and its values for the two binarised areas were compared (CVItotal vs. CVI1500).