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December's Case of The Month

Choroidal colobomas are caused by failure of the optic vesicle and choroidal fissure to close during fetal development. Choroidal coloboma can present as solitary or multiple lesions as in this case. Visual prognosis depends on the location and involvement of the optic nerve and macula. These patients are at risk for retinal detachment and choroidal neovascularization. Choroidal neovascularization has an increased tendency to develop at the superotemporal edge of the coloboma, which is thought to be caused by abnormal architecture of the RPE and Bruch’s membrane. Our patient is being followed yearly. [This case can be found on www.retinarocks.org in the Coloboma Non-optic nerve folder, Coloboma GSL-20181009]