Multifocal Visual Evoked Potential in Normal Subjects.
10.3341/jkos.2010.51.4.532
- Author:
Hoon Dong KIM
1
;
Sang Hyouk PARK
;
Young Hoon OHN
Author Information
1. Department of Ophthalmology, Soonchunhyang University College of Medicine, Bucheon, Korea. yhohn@schbc.ac.kr
- Publication Type:Original Article
- Keywords:
Amplitude;
Area;
Multifocal visual evoked potential;
Implicit time;
Sector
- MeSH:
Evoked Potentials, Visual;
Eye;
Noise;
Optic Nerve;
Organothiophosphorus Compounds;
Patient Compliance;
Visual Fields
- From:Journal of the Korean Ophthalmological Society
2010;51(4):532-541
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To introduce the clinical utility of multifocal visual evoked potential (mfVEP) and to assess the waveform from normal Korean subjects. METHODS: mfVEP with 4 channel recording was performed using the RETIscan(R) system (Roland Consult, Wiesbaden, Germany) for 25 eyes of 25 normal subjects. Amplitudes and implicit times were obtained from ring-shaped 6 areas and 4 sectors. To investigate the false-positive ratio of the examination, stimuli were given with one-half of the CRT monitor completely covered and the results were compared. RESULTS: Amplitudes of P1, N2 were larger in the central 10degrees area than other areas (p<0.001). Amplitudes were reduced and implicit times were prolonged on peripheral areas. P1 amplitudes were larger in the inferior field. Waves with large amplitudes by noise were recorded in 13.7% of covered areas. CONCLUSIONS: mfVEP is useful tool to detect local optic nerve damage and rule out the non-organic cause of visual field defect. However, mfVEP results are difficult to interpret due to noise and poor patient cooperation. Standardization of mfVEP is necessary for its application.
