annulus of Zinn
(redirected from Anulus tendineus)annulus of Zinn
The common tendon from which arise the four recti muscles of the eye. It surrounds the optic foramen and a part of the medial end of the superior orbital fissure. Syn. tendon of Zinn. See muscle cone.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann