Prepapillary Vascular Loops

Bilateral prepapillary vascular loops. 

  • Can be arterial or venous.
  • Usually congenital and most commonly unilateral.

Clinical features:

  • Usually gives no symptoms, unless it is complicated with vascular obstruction
  • Signs:
    • May appear as simple hairpin loops, in a figure eight, or in a corkscrew configuration
    • The loops usually project from the optic disc to the vitreous cavity and return to the optic disc
    • Can be associated with persistent posterior hyaloid vessel where the loops extend into Cloquet's canal