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Multifocal visual evoked potential in nonorganic visual field loss
Emma C Massicotte1, Linda Semela, Thomas R Hedges
1Tufts University, New England Eye Center, Tufts -- New England Medical Center, Boston, Mass, USA.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|March 16, 2005
Summary
Multifocal visual evoked potentials (MFVEP) testing may help diagnose nonorganic visual field loss when other tests are inconclusive. MFVEP showed normal results in patients with unexplained visual field deficits.
Area of Science:
- Ophthalmology
- Neuroscience
Background:
- Nonorganic visual field loss presents diagnostic challenges.
- Objective methods are needed to confirm functional deficits.
Observation:
- Five patients with unexplained visual field loss were studied.
- Neuro-ophthalmic examination and Humphrey visual field testing were performed.
- Multifocal visual evoked potential (MFVEP) testing was utilized.
Findings:
- Ophthalmic examination findings did not correlate with Humphrey visual field test results.
- MFVEP testing demonstrated normal electrophysiological tracings in all cases.
Implications:
- MFVEP may serve as a valuable tool in diagnosing functional visual field loss.
- Objective documentation of normal visual function can be achieved with MFVEP.
- This technique aids in differentiating organic from nonorganic visual impairments.