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. 2011 Feb 17;17:519–525.

Figure 1.

Figure 1

Electroretinograms comparing normal tracings to Case 1 and Case 2. Case 1 shows electroretinogram (ERG) amplitudes similar to the normal dark-adapted combined rod-cone response under both scotopic and photopic conditions (Scale bars show amplitude 500 microvolts, duration 75 ms). The responses from Case 2 have similar waveform, and scotopic-photopic homology, but lower amplitude.