Supplementary information for:
M. Wexler (2005). Anticipating the three-dimensional consequences of eye movements. Proc. Natl. Acad. Sci. USA, 102, 1246-1251.

Movie 1

Movie 2. Animated version of Fig. 2a, showing a two-frame SfM sequence, similar to stimuli used in the experiments. The 2D optic flow produces an impression of 3D structure and motion (stronger in most observers with one eye closed, as in the experiments). However, this stimulus is ambiguous, being compatible with either the interpretation shown in Fig. 2c or the one in Fig. 2d. In the absence of any movement, observers perceive the two interpretations equally often. However, it is shown here that in the moments before performing an ocular saccade to the right (for example), observers perceive the interpretation in Fig. 2d more often, and before performing an ocular saccade to the left they perceive the interpretation of Fig. 2c more often. In general, the interpretation whose 3D rotation is opposite to that of the eye is the one that is preferred ≈100 ms before the start of the eye movement.