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Related Experiment Video

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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

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The spatial pattern of peri-saccadic compression for small saccades.

Louisa Lavergne¹, Dorine Vergilino-Perez, Markus Lappe

¹Paris Descartes University, Laboratoire de Psychologie et Neuropsychologie cognitives, FRE3292 CNRS and IUPDP, Boulogne Billancourt, France. louisa.lavergne@parisdescartes.fr

Journal of Vision

|December 18, 2010

Summary

Visual perception is distorted during eye movements. This study reveals that peri-saccadic compression, a visual mislocalization effect, is weaker for smaller saccades and depends on stimulus position relative to the saccade target.

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Using Saccadometry with Deep Brain Stimulation to Study Normal and Pathological Brain Function

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Published on: July 14, 2016

Area of Science:

Neuroscience
Visual Perception
Ophthalmology

Background:

During eye movements (saccades), visual perception is transiently disrupted.
Briefly flashed stimuli near saccade onset are systematically mislocalized towards the saccade endpoint, an effect known as peri-saccadic compression.
Previous research primarily examined large saccade amplitudes.

Purpose of the Study:

To systematically investigate peri-saccadic compression for small saccade amplitudes (2°-10°).
To analyze the influence of saccade amplitude and stimulus position on perceptual errors.
To determine how stimulus location relative to the saccade target affects compression strength.

Main Methods:

Participants performed saccades with amplitudes ranging from 2° to 10°.
Brief visual stimuli were flashed at 11 different positions (1°-12°).
Localization judgments of flashed stimuli were collected and analyzed in relation to saccade parameters.

Main Results:

A weaker peri-saccadic compression effect was observed for smaller saccade amplitudes.
The magnitude of compression was found to be dependent on both the stimulus's position relative to the saccade path and its distance from the saccade target.
Stimulus side and relative distance to the saccade target significantly modulated the compression strength.

Conclusions:

Peri-saccadic compression is not uniform across all saccade sizes, being less pronounced for smaller saccades.
The spatial relationship between the stimulus and the saccade parameters (amplitude, target) critically influences visual mislocalization.
These findings refine our understanding of visual stability and spatial updating during naturalistic eye movements.