Sensation and Perception 9th Edition by Bruce Goldstein

Exercise 3

Stark and Bridgeman explained the perception of movement that occurs when pushing gently on the eyelid by a corollary discharge signal generated when muscles are pushing back to counteract the push on the side of the eye. What if the push on the eyelid causes the eye to move, and the person sees the scene move? How would perception of the scene's movement in this situation be explained by corollary discharge theory?
Figure

Why is this woman smiling? Because when she pushes on her eyelid, while keeping her eye fixed on one place, she sees the world jiggle.