Abstract
Abstract: :
Purpose: To evaluate the use of multifocal evoked potentials (mfVEP) in the diagnosis of functional visual field loss. Methods: Five patients with unexplained visual field loss underwent full neuro–ophthalmic examination, automated visual field testing and mfVEP testing with the Accumap perimeter. Results: In all 5 cases, the ophthalmic examination did not correlate with the degree of visual field loss seen on automated visual field testing. The mfVEP testing showed essentially normal tracings in all patients, including those with co–existing optic nerve pathology (papilledema). Conclusions: Multifocal VEP may be useful in cases of difficult to prove, functional visual field loss or in cases where objective documentatioon of normal function is needed.
Keywords: electrophysiology: clinical • visual fields • neuro–ophthalmology: diagnosis