Retinal masqueraders of optic nerve disease.

Electrophysiologic testing of the visual system and ancillary imaging investigations may be crucial aids for correctly diagnosing patients with unexplained visual loss or isolated disc pallor. These patients may harbor a retinal disease process and not an optic neuropathy. A diverse range of retinal conditions may present in this manner, and misdiagnosis may lead to unnecessary neurologic investigation and subsequent delay in therapeutic intervention.