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The inferior ophthalmic vein is a vein of the orbit around the eye. It receives veins from many structures. It divides into two branches, one of which ends in the pterygoid plexus through the inferior orbital fissure, and the other which ends in the cavernous sinus through the superior orbital fissure. It drains blood from the inferior rectus muscle, the inferior oblique muscle, the lateral rectus muscle, the inferior conjunctiva, and the lacrimal sac. It can be affected in periorbital cellulitis.
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