Documents eye examination 3 results

Previous research using punctuate reaction time and counting tasks has found that the startle eyeblink reflex is sensitive to attentional demands. The present experiment explored whether startle eyeblink is also modulated during a complex continuous task and is sensitive to different levels of mental workload. Participants (N = 14) performed a visual horizontal tracking task either alone (single-task condition) or in combination with a visual gauge monitoring task (multiple-task condition) for three minutes. On some task trials, the startle eyeblink reflex was elicited by a noise burst. Results showed that startle eyeblink was attenuated during both tasks and that the attenuation was greater during the multiple-task condition than during the single-task condition. Subjective ratings, endogenous eyeblink rate, heart period, and heart period variability provided convergent validity of the workload manipulations. The findings suggest that the startle eyeblink is sensitive to the workload demands associated with a continuous visual task. The application of startle eyeblink modulation as a workload metric and the possibility that it may be diagnostic of workload demands in different stimulus modalities is discussed.

"Now most of the fatigue objective evaluation methods require a head-mounted eye tracker, electrical testing equipment, etc., and these devices are difficult to use in aircraft cockpit. Thus, a simple and practical method of detecting pilots fatigue is brought forward in this paper. This method firstly judges the open or close state of eyes by accurately finding out the frame of eyelid, and applies it to the PERCLOS detection. Secondly, the essay will explain the calculation of the spatial location of three key points. Thirdly, the essay will describe the face angle, which between the plane of these three points with the plane of human body. Finally, according to the PERCLOS parameters and the angle of human face, it is easier to determine the fatigue state. The research result in this paper is significance for the field of fatigue monitoring and eye gaze tracking."