annulus of Zinn

== English == === Etymology === Named after Johann Gottfried Zinn (1727–1759), German anatomist and botanist. === Noun === annulus of Zinn (anatomy) A ring of fibrous tissue surrounding the optic nerve at its entrance at the apex of the orbit. ==== Synonyms ==== anulus tendineus communis, common tendinous ring ==== Related terms ==== circle of Zinn-Haller zonule of Zinn ==== Translations ====