Gaze-angle dependency of pupil-size measurements in head-mounted eye tracking

• Published in: Behavior research methods Vol. 54; no. 2; pp. 763 - 779
• Main Authors: Petersch, Bernhard, Dierkes, Kai
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.04.2022
• Subjects: Behavioral Science and Psychology; Cognitive Psychology; Eye Movement Measurements; Eye Movements; Eye-Tracking Technology; Humans; Psychology; Pupil - physiology; Corneal refraction; Eye tracking; Pupil foreshortening error; PFE; Pupillometry; 3D eye model
• ISSN: 1554-3528; 1554-351X; 1554-3528
• DOI: 10.3758/s13428-021-01657-8

Pupillometry - the study of temporal changes in pupil diameter as a function of external light stimuli or cognitive processing - requires the accurate and gaze-angle independent measurement of pupil dilation. Expected response amplitudes often are only a few percent relative to a pre-stimulus baseli...