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Perceived position and saccadic eye movements.

A Mack, R Fendrich, D Chambers

    Vision Research
    |January 1, 1985
    PubMed
    Summary
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    Saccades, or rapid eye movements, occurring 600 milliseconds after a visual stimulus are directed toward the perceived location of the target. This eye movement behavior occurs even when the perceived position differs from the actual retinal and spatial location.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Ophthalmology

    Background:

    • Understanding the control mechanisms of human eye movements is crucial for diagnosing and treating visual disorders.
    • Saccades are rapid, ballistic eye movements that shift the fovea to new locations.
    • Previous research has explored the relationship between visual stimuli and saccadic eye movements, but the role of perceived location remains an area of active investigation.

    Purpose of the Study:

    • To investigate whether saccades are directed to the perceived location of a visual target.
    • To determine if this occurs even when the perceived location deviates from the actual retinal and spatial position of the stimulus.

    Main Methods:

    • Participants were presented with brief visual stimuli.
    • Saccadic eye movements were recorded using precise eye-tracking technology.

    Related Experiment Videos

  • Data analysis focused on saccades occurring 600 milliseconds or more after stimulus presentation.

    • Main Results:

    • Saccades occurring 600 milliseconds or more after stimulus onset were consistently directed towards the perceived location of the target.
    • This finding held true even when the perceived target location differed significantly from its actual retinal and spatial coordinates.

    Conclusions:

    • The human visual system can direct saccadic eye movements to a perceived location that is not aligned with the physical stimulus.
    • This suggests a complex interplay between sensory input, perceptual processing, and motor output in guiding eye movements.