Position metrics panel
The Position metrics panel shows the horizontal and vertical position of the eyes throughout the recording. The location of the centre of the pupils is shown in mm at the top of the graphic. This is measure relative to an axis from the centre of the screen and normal to the plane of the screen.
A variety of metrics are shown at the bottom of the graphic:
HPD: Horizontal Pupillary Distance in mm
VPD: Vertical Pupillary Distance in mm
Dist: Viewing distance in mm