Figure 3. Eye rotations during stabilization.

(a) The distribution of speeds during periods of stabilization (i.e. eye movements that keep point of gaze approximately stable in the scene). (b) A polar histogram of eye movement directions during these stabilizing movements. 270 deg corresponds to straight down in eye centered coordinates, while 90 deg corresponds to straight up. Stabilizing eye movements are largely in the downward direction, reflecting the forward movement of the body. Some upward eye movements occur and may be due to misclassification of small saccades or variation in head movements relative to the body. Shaded region shows ±1 SEM across 10 subjects.