a statistical trendp = 0.052
During the treatment phase, no significant differences were observed between groups at mid-treatment (W4) and at the end of the treatment (W8) for: i) a- and b- wave amplitudes or implicit times in ffERG; ii) N35, P50 and N95 wave parameters in PERG − although a statistical trend was noted for N95 implicit time at W8 (p = 0.052, Mann Whitney U test); and iii) N1 and P1 amplitudes or implicit times in any concentric retinal regions (<2°, 2-5°, 5-10° and 10-15° around the fovea) in mfERG ( Table 3 ). 4.