Term Name:	common tendinous ring
Synonyms:	annulus of Zinn, annulus tendineus communis, anulus tendineus, anulus tendineus communis, common tendinous ring, ligament of Zinn, tendon of Zinn
Definition:	A ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit.
Ontology:	Uberon Ontology [UBERON:0014796]