Opening Duration of Spontaneous Blink and Experimental Visual Load

Abstract

This study proposes a new method to estimate the visual load objectively and briefly. The closing and opening durations of the spontaneous blink were used as physiological indices, which were derived from the initiation and peak points of the electro-oculography waveform. Three experiments were carried out: the changes of the closing and opening durations due to the experimental visual load, due to the biological rhythm, and due to the width of palpebral fissure, were investigated respectively. It became clear that the opening duration of a spontaneous blink prolongs by the visual load, which is not sensitive to the biological rhythm, the interindivisual variations, and the initial width of palpebral fissure.