Torsion is the rotation of the eye-ball about the line of sight, i.e. rotation about the z-axis. ViewPoint measures torsion in degrees of rotation and stores the values in the ASCII format data file. Data can also be accessed real-time from other applications. Real-time feed-back is displayed in the PenPlot window.
Torsion from head roll
Torsion from saccades
Torsion Measurement is available as an additional option. Item 0035 $1,998.
