Fig. 2

Grid-based vessel density maps of the retinal capillary plexus obtained from the Optovue AngioVue OCTA system. (a) Superficial retinal vessel density map and (b) deep retinal vessel density map of a normal subject. (c) and (d) represent the corresponding maps from an SLE patient with nephritis, while (e) and (f) represent those from an SLE patient without nephritis. The dotted lines divide the maps into nine quadrants, with vessel density percentages calculated for each quadrant. Hot colors (red, orange, and yellow) indicate areas of high vessel density, whereas cold colors (green and blue) represent areas of lower vessel density