Figure 3.

ERG trace from a Manduca sexta retina in response to a grey disc presented for 2 frames (33.33 ms). During a single frame (based on the 60 Hz information-update framerate), the projector goes through two cycles of flickering in each individual color channel (I frame = RGBRGB flickers). The average luminance is shown by the solid black trace under photoreceptor responses. The flicker of the individual color channels is shown by the colored hash marks beneath the luminance trace. The single ERG in response to the flash indicates the moth's retina did not resolve the 120 Hz flicker present in each color channel, nor did it resolve the overall 360 Hz flicker of the projector.