부산대학교 도서관

Abstract Background  In order to measure blinking, we developped a dynamic device consisting of a CCD camera connected to a videonystagmography machine. We developed an artificial pupil that allowed the camera to track movements of the upper eyelid. Methods  Blinking parameters were measured in eight healthy volunteers, studying spontaneous blinking (SB) and voluntary blinking (VB) responses. Closing time, opening time, closing speed, vertical amplitude, horizontal amplitude and frequency of spontaneous blinking were recorded. Results  In SB, opening time (0.21 � 0.04 s) was significantly longer than closing time (0.10 � 0.02 s) (p p p  Conclusions  Computer-assisted video acquisition provides real-time measurement of eyeblink dynamics. On healthy volunteers, this method enables accurate measurement of opening and closing responses as well as associated horizontal movement, and enables differentiating spontaneous and voluntary blinking. [ABSTRACT FROM AUTHOR]