The human eyes move rapidly and repeatedly , focusing on a single point for only a short period of time before moving  to the next point. These rapid eye movements are called saccades. If a video camera were to perform such high speed changes in focal points, the image on screen would be a blurry, nauseating mess. Despite this rapidly changing input to the visual system, the normal experience is of a stable visual world; an example of perceptual constancy. Transsaccadic memory is a system that contributes to this stability.
In many situations, human eyes move repeatedly in rapid, discontinuous steps, focusing on a single point for only a short period of time before moving abruptly to the next point. Rapid eye movements of this type are called saccades. If a video camera were to perform such high speed changes in focal points, the image on screen would be disorienting for a human viewer. In contrast, despite the rapidly changing sensory input to the visual system, the normal experience is of a stable visual world; an example of perceptual constancy. Transsaccadic memory is a system that contributes to this stability.
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The
In many situations,
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rapidly and repeatedly ,
repeatedly in rapid, discontinuous steps,
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abruptly
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These rapid eye movements
Rapid eye movements of this type
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a blurry, nauseating mess. Despite this rapidly changing
disorienting for a human viewer. In contrast, despite the rapidly changing sensory