Fig. 7. The radial peripapillary capillaries (RPCs). A. Distribution of RPCs. x indicates macula. B. The RPCs originate from intraretinal arterioles that also supply the deeper capillary beds. C. A retinal digest showing the RPCs (arrows). (Henkind P: Microcirculation of the peripapillary retina. Trans Am Acad Ophthalmol Otolaryngol 73:890, 1969)