Retinal optic flow during natural locomotion
Fig 7
The relationship between curl, divergence, and the angle between the eye’s velocity vector and the fixation point.
The x-axis in A & B shows the angle between the vertical projection of the eye’s velocity vector and the fixation point, with zero denoting that the eye’s instantaneous velocity vector passes directly through the point of fixation on the ground, negative values mean the eye will pass to the left of the fixation point, and positive values mean the eye will pass to the right. The Y-axis of (A) represents the curl of the retinal flow field at the fovea (foveal curl). Each dot represents a single recorded frame from S10 Video, with the different colors denoting data from the three subjects. The Y-axis of (B) shows the angle between the point of maximum divergence in the retinal flow field and the point of fixation, measured similarly to the angle between the eye vector and the fixation point on the x-axis.