Movie 1. Animated version of Fig. 1c, showing an optic simulation of a typical saccade. If the observer’s gaze remains still during the change between the two images, this provides a rough simulation of the optic flow during a typical saccade. Most observers perceive a sideways shift of all points, but also a depth rotation about a vertical axis of all surfaces. The images were created by rotating the camera by ≈10° (typical amplitude of human saccades) about its optical center between the two photographs.

(Credit: 75, rue Vieille du Temple, Paris)