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

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CZH – Acronym

CZH stands for: Circle of Zinn Haller (anastamotic ring formed by the short posterior ciliary arteries around optic disc)