Figure 3. Fluorescent dye angiography of the choriocapillaris, taken with permission from Hayreh⁶²,⁶³.

The scale bars are missing from the original publication. The mosaic pattern observed during the filling of the choriocapillaris with a passive fluorescent dye is shown in (a). Images (b–d) show the segmentation pattern at different time points as the passive dye fills (b,c) and drains (d) the choriocapillaris within the area delineated in (a). The fluorescent units forming the mosaic displayed in (a) have been described as ‘functional lobules’, and consist of one or a group of functional vascular segments as defined in the present work.