Walsh & Hoyt: Doubling of the Optic Disc

Doubling of the optic discs is a rare anomaly in which two optic discs are seen ophthalmoscopically and presumed to be associated with a duplication or separation of the distal optic nerve into two fasciculi. Collier described a case and reviewed eight such reports in the literature. Although these anomalies varied considerably, most had a main disc and a satellite disc, each with its own vascular system. Most cases occur unilaterally and are associated with decreased acuity in the affected eye. ince Colliers report, several other cases have been reported which appear to represent pseudodoubling of the optic disc.