Automated pupil size determination for evaluating fluctuations in physiological arousal

摘要

Measurement of pupil diameter and the rate of pupil diameter fluctuation have been found to be a possible determinant of measures of physiological vigilance. This paper reviews an initial study of an imaging method for pupillometric analysis. The pupil parameter determination is based on a dynamic threshold approach, which accurately segments the pupil from the retina. A video camera is used to capture the pupil while the patient is attending to a vigilance task. Accuracy of pupil radii and area measurements were found to be in the order of 5