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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. However, the veins run posteriorly in the sclera exiting the eye well posterior to the equator.
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1. a vein formed by branches from the back surface of the eye and the ciliary body; empties into the ophthalmic veins
(synonym) vortex vein, vena vorticosum
(hypernym) vein, vena, venous blood vessel
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