Influence of head orientation on eye position distribution.

<p>(A) Distribution of eye positions with different head orientations is shown in different panels. The horizontal head orientation is binned into 15 groups and eye position data are analyzed for each group. The range of head orientation for each group is shown at the top of each panel. The ordinate shows the percentage of fixations from all head directions and the abscissa shows horizontal eye position relative to the head. The red line shows a Gaussian function fitted by a least square method. (B) The average of the peaks of the Gaussian functions fitted to each data set from seven subjects as a function of head orientation. Error bars represent standard error.