Perception and Eye Movements

Over the last decade or so, revolution in our understanding of the neural processing underlying oculomotor behavior has begun. Here we review recent evidence that nonretinal signals related to perception and cognition serve as core components of the visual drive for voluntary eye movements. Older models that merely manipulate raw retinal signals within quasilinear negative feedback loops in retinal coordinates cannot expain a host of revealing new findings. New models of pursuit and saccades that incorporate nonlinear processing of signals more closely related the properties of target objects, within coordinate system more closely related to head or world coordinates, are needed to explain how top-down cognitive factors and bottom-up retinal data combine to drive both perception and oculomotor action.

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