central artery of retina

n.
  1. The branch of the ophthalmic artery that penetrates the optic nerve behind the eye, enters the eye at the optic papilla in the retina, and divides into superior and inferior temporal and nasal branches.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.