circle of Zinn(redirected from circle of Haller)
Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
circle of Zinn
Anastomosing circle of short ciliary arteries which have pierced the sclera about the optic nerve. Branches pass forward to the choroid, inward to the optic nerve and backward to the pial network. Syn. circle of Haller.