Figure 1. Scotopic electroretinographic recordings in albino and pigmented rats. Examples of the ERG traces recorded in an albino (A) and pigmented (B) rats in response to flash stimuli of increasing intensity. Thin traces correspond to recordings obtained from the right eye and bold traces correspond to recordings obtained from the left eye. The intensity of the flash stimuli is indicated in log cd·s/m² units at the left of the recording traces. The scotopic threshold responses were elicited by weak light stimuli from −4.60 to −5.40 log cd·s/m². Rod and mixed responses were elicited by light intensities from −3.96 to 2.03 log cd·s/m². No significant difference in the ERG amplitudes between left and right eyes was observed in any of the studied animals. Examples for the measurement of wave amplitudes are shown in the albino rat recordings.