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Definition: a fibrous anulus that surrounds the optic canal and the medial part of the superior orbital fissure; it gives origin to the four rectus muscles of the eye and is partially fused with the sheath of the optic nerve.
Synonym(s): anulus tendineus communisTA, anulus of Zinn, Zinn ligament, Zinn ring, Zinn tendon
Examples: glitazone, GI cocktail, etc.
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