dard deviation of binocular eye position and along with noise estimates
from monocular videos. Vertical vergence during steady
fixation had a standard deviation of 1–2 arc min in three subjects
for whom we had good quality monocular and binocular video.
Horizontal vergence had more variability, ranging from 2 to
10 arc min.
Estimates of the noise level from analysis of a split field monocular
video on each subject showed differences of less than an arc