Visual perception during movements of the eyes and head

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The goal of this ongoing research program is to develop a rigorous understanding of the interaction between gaze shifts and visual perception. Behavioral experiments conducted over the last 100 years have noted a wide range of changes in visual perception around the time of fast eye movements called saccades. These include illusory changes in stimulus position, timing, and even shape. A similar range of perceptual effects has been found for slower eye movements known as smooth pursuit. Together these effects reveal a clear influence of oculomotor signals on visual perception. Yet they have typically been studied under rather artificial conditions, in which subjects are instructed to make a single eye movement, while an isolated visual stimulus is presented.