Objective To compare pattern-pulse multifocal visual evoked potential(PPmf VEP) with patternreversal multifocal visual evoked potential(PRmf VEP), and to investigate the symmetry of mf VEP between both eyes in normal individuals. Methods The multifocal Vision Monitor was used to observe the mf VEP. T-test and ANOVA were used to analyze P1 wave, amplitude and signal noise ratios(SNR) of two mf VEPs. Results The SNR and the P1 amplitude reached the maximum at the central visual field and decreased with the in...