Demo 2: Continuous Flash Suppression reduces Negative Afterimages

(Experiment 2 in Tsuchiya & Koch.pdf)

Direction: To see these demo, you need a mirror setup. Adjust the angles of mirrors to fuse the images on the left and right.

Baseline afterimage. After adjusting a mirror,start the movie. On your left eye, a pink-green stripe will be shown. If you don't move your eyes, you will see a vivid afterimage when the stripe is replaced by the gray background (after 5 seconds).

The negative afterimage here should be weaker than the one you saw in the above demo. Continuous Flash Suppression reduces the intensity of negative afterimages.