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.

Management

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