title: Study for analysis of the multifocal visual evoked potential.
abstract: OBJECTIVE
  To introduce the clinical utility of the absolute value of the reconstructed waveform method in the analysis of multifocal visual evoked potential (mfVEP).
  
  
  METHODS
  The mfVEP with 4-channel recording was performed using RETIscan® on 10 eyes of 10 normal subjects. Amplitudes were obtained from ring-shaped 6 areas and 4 sectors. The best visual evoked potential (VEP) response method and the absolute value of the reconstructed waveform method were compared in terms of analysis of the amplitudes. In order to assess the false positive rate of the examination, stimuli were administered with one-half of the cathode ray tube (CRT) monitor completely covered and the results were compared using 2 methods.
  
  
  RESULTS
  The amplitudes in 6 areas and 4 sectors analyzed with the best VEP response method and the absolute value of the reconstructed waveform method showed no statistical difference (p > 0.05). The amplitude in the stimuli-blocked area of the absolute value of the reconstructed waveform method was smaller than that of the best VEP response method (p < 0.05) and the amplitude of the stimuli area showed no substantial difference between two methods (p > 0.05).
  
  
  CONCLUSIONS
  The absolute value of the reconstructed waveform method has similar reproducibility and lower level of false positives relative to the best VEP response method. Therefore, it can be considered as a useful method in the analysis of the mfVEP.
authors: Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
authors: Saemi
authors: S
authors: Park
authors: Sang Hyouk
authors: SH
authors: Park
authors: Jee Ho
authors: JH
authors: Chang
authors: Young-Hoon
authors: YH
authors: Ohn
mesh_terms: D000328:Adult; D001330:Electronic Data Processing; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D012016:Reference Values; D015203:Reproducibility of Results; D012160:Retina / Q000502:physiology*; D012189:Retrospective Studies; D014794:Visual Fields