Fig. 5
From: earEOG via periauricular electrodes to facilitate eye tracking in a natural headphone form factor

Voltage differences for each visual angle and direction of gaze when performing saccades using earEOG and gold-standard EOG. Scatter plots show the mean voltage differences for each visual angle and direction of gaze using earEOG (red/blue) and gold-standard EOG (coral/lightblue). The filled areas around the lines show the standard deviation.