Circle of Zinn Haller

  • It is an anastomotic ring formed by the branches of short posterior ciliary arteries anastomosing with each other around the optic disc
  • Branches pass to the optic nerve, choroid and the pial network
  • Alternate names :
    • Peripapillary circle of Zinn-Haller
    • Circle of Zinn
    • Circle of Haller