A simple device for detecting departures from visual fixation |
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| Authors: | Michel Treisman S. Fearnley |
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| Affiliation: | 1. Department of Experimental Psychology, University of Oxford, South Parks Road, OX1 3UD, Oxford, Great Britain
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| Abstract: | A device for detecting departures from visual fixation is described. The principle is to present control targets to one or both eyes at the projected position of the blind spot. When fixation is maintained the control target or targets are not seen. Departures from fixation manifest themselves by the reappearance of the target or targets in the visual field. The system allows approximately 1 deg of movement or less away from the fixation point in either direction. |
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