Sun Y, Ng JK, Gaynon MW., Retin Cases Brief Rep. 5(2):144-5. doi: 10.1097/ICB.0b013e3181cc2135., 2011 Apr 01
PURPOSE: The purpose of this study was to report a case of a chorioretinal coloboma mimicking a second optic disk in an asymptomatic 12-year-old boy.
METHODS: This is a case report.
RESULTS: An asymptomatic 12-year-old boy presented with a chorioretinal coloboma of the right eye giving the impression of a second optic disk. The patient also had a superior visual field defect.
CONCLUSION: True optic nerve duplication is a rare entity that can be mimicked by other etiologies, including choroidal colobomas and postinflammatory lesions, requiring careful examination by clinicians.