Fig. 4.
Pigment accumulation and ERG a-wave amplitudes. Pigment accumulation and a-wave responses were plotted against time of complete dark adaptation. Data from 2- and 13-month-old animals were combined for this analysis. Pigment accumulation (○) and the increase in a-wave amplitude (•) were found to be linear over time (R = 0.974 and 0.918, respectively).