“…OCTA utilizes specific algorithms to image only moving red blood cells in the vessels, providing three-dimensional (3D) visualization and quantitative analysis of the blood flow status across different vascular membrane layers of the retina and choroid ( Lommatzsch, 2020 ; Koutsiaris et al, 2023 ). With the continual advancement in AI algorithms and ophthalmic imaging technology, several quantitative models for retinal blood vessels have been established, with high levels of sensitivity and specificity ( Nguyen et al, 2013 ; Nunez do Rio et al, 2020 ; Comin et al, 2021 ; Liefers et al, 2021 ; Zhou et al, 2022 ; Nardini et al, 2023 ). Retinal vessel quantification is crucial in studying ocular and systemic diseases.…”