Fig. 2: FFA imaging in a patient with abnormal congenital vascular development in the right eye who underwent the oral FFA protocol.

Each panel shows the stages of the oral FFA imaging at different time (T) intervals. As can be seen, the choroidal flush and cilioretinal/optic disc vessels show early filling. This is followed by the arterial and capillary phases, as time continues showing the venous phase. In this patient, we can see normal vessel filling and perfusion throughout the FFA imaging in the left eye, in the right eye, marked vascular tortuosity is observed with excessive vessels. In the capillary and venous phases, in the far temporal periphery (Zone 3) there is a large avascular zone (red arrows), with some anastomosis of the retinal vessels.