Double disc sign

File number: 99790

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Appears in: Miscellaneous
Condition/keywords: Pseudoduplication of optic disc
Photographer: Priyal Mistry
Imaging device: Fundus camera
Description: Double disc sign Doubling of the optic disc is rare and can manifest as true or pseudo doubling. Duke-Elder describes duplication of the optic disc as a rare anomaly wherein two discs, each provided with retinal vessels are seen in an otherwise normal eye. Rare cases of true duplication of optic discs with separation of optic nerve into two or more strands have been reported, based either on incidental necropsy findings, demonstration of two optic foramina in the same orbit on x ray, or angioscotomas as indirect evidence of the existence of double optic nerves. Pseudo doubling of the optic discs caused by lesions such as optic disc coloboma, peripapillary chorioretinal coloboma, or inflammatory foci are more common. Our case had Ipsilateral isolated ectatic peripapillary chorioretinal coloboma simulating double optic discs.