| Abstract [eng] |
In this research binocular fixational eye movement were studied. Our eyes continually move even while we fix our gaze on an object. Although these fixational eye movements have a magnitude that should make them visible to us, we are unaware of them. Periodical drifting and flicking eye movements during fixation performs scanning of the perceived visual information. Fixational eye movements reduce an accuracy of the defined target direction in the target pointing tasks, therefore possibilities of filtering them was analyzed. It was found that for both eyes two-dimensional scatter of the fixational eye movements in the horizontal direction is 1.5-2 times smaller than in the vertical. Two-dimensional scatter of the differences of the right and left eyes movements are significantly smaller than scatter of the each eye measured separately. Scatter of the fixational eye movements is smaller when fixation is elicited to the visible spot in comparison to the imaginary target. Differences between means of the two-dimensional probability distribution of the fixational eye movements and the target directions stay within 10 min of arc. Standard deviations of the probability distributions changes only 10% when fixation spot is displaced up and down and changes 100% when it is displaced to the right and to the left. Scatter of the fixational eye movements is under the influence of the psychological concentration and influence of the alcohol of the operator. |
