Retinal optic flow during natural locomotion
Fig 8
Deviation from initial fixation location over the course of fixation.
Initial fixation location is computed and tracked over the course of each fixation, and compared to current fixation for duration of each fixation. Median deviation value is calculated for each fixation. The histogram captures the extent of variability of initially fixated locations relative to the fovea over the course of fixations, with most initially fixated locations never deviating more than 2 degrees of visual angle within the fixation. Long tail of distribution likely arises from erroneously labeled fixations where there are multiple small saccades. Fig 1B. Histogram of directions of retinal slip during a fixation. Most of the values are downward, as expected by a gain of less than 1.0.