Time on task and blink effects on saccade duration

Article Abstract:

The saccade duration increases with an increase in the time-on-task (TOT) during a two-hour air traffic control stimulating task. The saccade amplitude decreases during the beginning of the two-hour period, increases in the middle, and then decreases again at the end of the task. The increase in the duration decreases the regression line slope, which connects saccade amplitude to duration. A decrease in the slope due to TOT reflects a rise in the number of low velocity saccades occurring with high fatigue. The saccades occurring during an eye blink are slower than those occurring without it.

Observations, Fatigue

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Effects on visual functions during tasks of object handling in virtual environment with a head mounted display

Article Abstract:

An investigation of the effects of a prolonged handling task within the helmet-mounted display (HMD) environment on visual functions revealed sluggishness in version eye movement and accommodative response during the 40-minute task. Both functions were also worsened by delayed presentation of display after head movement. However, the sluggishness of responses was not significantly affected by delayed presentation after hand movement. These results indicate that decreasing time delay after head movement is important in enhancing performance of handling tasks within the HMD environment.

Research, Virtual reality, Vision

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Saccadic velocity and activation: development of a diagnostic tool for assessing energy regulation

Article Abstract:

A study was conducted to analyze the relationships between saccadic eye movements in visual motor tasks and energy regulations. A choice task was given to the subjects and their saccadic peak-velocity of task-relevant eye movements were measured. Results revealed that peak saccadic velocity of task-related eye movements showed energy regulation while performing chosen tasks. Such result may be used as a basis in determining appropriate workload.

Visual evoked response, Visual evoked potentials

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