Chorioretinal Coloboma

Chorioretinal Coloboma
  • Congenital lesion, characterized by absence of normal retina, RPE and choroid.

Clinical Features

  • Symptoms: depend on the location of the coloboma and ocular structures involved.
  • Signs:
    • Typically located in inferotemporal area
    • Can be unilateral or bilateral
    • May extend and involve the macula
    • Maybe associate with coloboma of other ocular structures along the embryonic fissure i.e. optic nerve, iris or lid
    • Choroidal neovascularization may develop at the margin of the coloboma
  • Associated with higher incidence of retina detachment.


Surgical retinal reattachment procedures include scleral buckling, vitrectomy and silicone oil tamponade.