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