What primarily drains blood from the inner retinal layers?

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Prepare for the NBEO Ocular Anatomy Posterior Segment and Cranial Nerves Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What primarily drains blood from the inner retinal layers?

Explanation:
Inner retinal blood is collected by the central retinal vein, which drains blood from the inner retinal capillary plexuses (covering layers from the nerve fiber layer through the inner nuclear layer). This vein travels with the central retinal artery through the optic nerve head and, after passing the lamina cribrosa, usually drains into the superior ophthalmic vein, then onward to the cavernous sinus. The outer retina and choroid drain via choroidal and vortex veins, not the central retinal vein, so the inner retina’s primary drainage route is through this central retinal vein.

Inner retinal blood is collected by the central retinal vein, which drains blood from the inner retinal capillary plexuses (covering layers from the nerve fiber layer through the inner nuclear layer). This vein travels with the central retinal artery through the optic nerve head and, after passing the lamina cribrosa, usually drains into the superior ophthalmic vein, then onward to the cavernous sinus. The outer retina and choroid drain via choroidal and vortex veins, not the central retinal vein, so the inner retina’s primary drainage route is through this central retinal vein.

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