Tags: Anatomical Structure, Vein.
The vorticose veins referred to clinically as the vortex veins drain the ocular choroid. The number of vortex veins is known to vary from 4 to 8 with about 65% of the normal population having 4 or 5. In most cases there is at least one vortex vein in each quadrant. Typically the entrances to the vortex veins in the outer layer of the choroid (lamina vasculosa) can be observed funduscopically and provide an important clinical landmarks identifying the ocular equator.
