Figure 4. ERG. A: Representative ERG waveforms from the buffer-treated (left), control vector-NMDA-treated (middle), and therapeutic vector-NMDA-treated (right) groups. B: Statistical analysis of the a- and b-waves of each group (buffer only, n = 4; control vector-NMDA, n = 8; therapeutic vector-NMDA, n = 12, *p<0.05 and **p<0.01 in SNK test).