Skip to main content
. Author manuscript; available in PMC: 2015 Apr 1.
Published in final edited form as: J Opt Soc Am A Opt Image Sci Vis. 2014 Apr 1;31(4):A208–A213. doi: 10.1364/JOSAA.31.00A208

Fig. 2.

Fig. 2

This graph contains the main L/M- and S-ERGs generated by the ON–OFF ERG paradigm. (a) Contains both the L/M-cone mediated trace (green) and the S-cone mediated trace (violet). The L/M-cone trace has got many of the features indicative of ON–OFF ERGs in response to white-light stimuli, with the exception that the tight filtering characteristics has removed much of the lower frequency noise not representative of photoreceptor or bipolar mediated responses. (b) Expands the first 100 ms after light onset. +(L+M) a and b waves occur at 17.3 and 30.8 ms, respectively (i, ii), and S-cone a and b waves occur at 26.2 and 40.3 ms, respectively (iii, iv). (c) Expands the first 100 ms after light offset. A −(L+M) d-wave happens at 20.1 ms after light offset (v), and S-cones have no characteristic depolarization indicative of a d wave. In fact, the waveform seen at the light offset for S-cone responses is opposite in polarity to the d wave.