[Comparison of Pattern-pulse and Pattern-reversal Multifocal Visual Evoked Potentials in Normal Individuals].
OBJECTIVE
To compare pattern-pulse multifocal visual evoked potential (PPmfVEP) with pattern-reversal multifocal visual evoked potential (PRmfVEP), and to investigate the symmetry of mfVEP between both eyes in normal individuals.


METHODS
The multifocal Vision Monitor was used to observe the mfVEP. T-test and ANOVA were used to analyze P1 wave, amplitude and signal noise ratios (SNR) of two mfVEPs.


RESULTS
The SNR and the P1 amplitude reached the maximum at the central visual field and decreased with the increase of eccentricity, and then decreased slowly. The amplitude of the PPmfVEP was significantly smaller than the PRmfVEP in the central retina, while in the peripheral retina the result was exactly the opposite. SNR and amplitude of the PRmfVEP showed no statistical difference in both eyes (P > 0.05). The variance of the amplitude at the same side of visual field was larger than that at the symmetrical visual quadrant.


CONCLUSIONS
mfVEP can reflect the visual function in different parts of retina objectively and exactly. PPmfVEP reflect the vision function of the central retina better than PRmfVEP. The stability of PPmfVEP is better than PRmfVEP in the central retina, while the result is opposite in the peripheral retina. The mfVEP is symmetrical in both eyes of the same individual.
Rong-ting
RT
Zhu
Xing-ben
XB
Liu
Xiao-ming
XM
Xu
Chuan-fei
CF
Zheng
D005074:Evoked Potentials, Visual / Q000502:physiology*; D006801:Humans; D009460:Neurologic Examination; D012016:Reference Values; D012160:Retina; D012680:Sensitivity and Specificity; D014794:Visual Fields / Q000502:physiology*