Figure 4. Full field electroretinograms (ERGs). A: ERG responses from a control. B: In patient JU#1085, the ERG after 30 min of dark adaptation (DA) shows non-recordable rod and combined responses along with severely decreased cone and 30 Hz flicker responses in the left eye (left, L), whereas marked recovery of the rod and combined responses was observed after 24 h of DA in the right eye (right, R; 26 years of age). C and D: In patient JU#1303, the ERG after 30 min of DA shows non-recordable rod and combined responses along with decreased cone and 30 Hz flicker responses in the left and the right eyes, whereas partial recovery of the combined responses after 24 h of DA are observed in the left and the right eyes (13 years of age).