Figure 7
From: Humans use Optokinetic Eye Movements to Track Waypoints for Steering

An example of typical locations of the calibration points in the driver visual field (red crosses). Instead of multiple targets, we used a single target on a tripod about 7 m in front of the car (calibration point 1), and the participant was instructed to turn their head and hold fixation in a pre-determined sequence, which brought the calibration target into different parts of the head-referenced visual field.