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Optic nerve atrophy and CT scanning: the target sign
Annals of Ophthalmology
|April 1, 1986
Abstract:
Three patients are described who demonstrate the "target-sign" of optic nerve atrophy on CT scanning. This sign is produced by the centrally located atrophic optic nerve surrounded by a patulous perioptic subarachnoid space. An explanation for this phenomenon is proposed.