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Related Experiment Video

Updated: Mar 25, 2026

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

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

Published on: March 18, 2019

Monocular microsaccades are visual-task related.

Josselin Gautier, Harold E Bedell, John Siderov

Journal of Vision

|February 26, 2016

Summary

This summary is machine-generated.

This study reveals monocular microsaccades, distinct eye movements, occur during visual tasks. These movements differ from binocular microsaccades and may aid fine visual corrections.

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Last Updated: Mar 25, 2026

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Recording Horizontal Saccade Performances Accurately in Neurological Patients Using Electro-oculogram

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Published on: March 13, 2018

Area of Science:

Neuroscience
Ophthalmology
Vision Science

Background:

During visual fixation, the eyes exhibit constant microscopic movements including tremor, drift, and microsaccades.
Previous research indicated microsaccades are binocular and conjugate, aligning with Hering's law of equal innervation.

Purpose of the Study:

To document the existence and characteristics of monocular microsaccades.
To investigate the functional role of monocular microsaccades in visual tasks, particularly during fixation and discrimination.

Main Methods:

Observation of eye movements during visual fixation and a letter C gap discrimination task.
Analysis of microsaccade frequency, amplitude, and peak velocity, differentiating between monocular and binocular movements.
Robustness checks using varied velocity and duration criteria for microsaccade identification.

Main Results:

Monocular microsaccades were identified and shown to differ significantly from binocular microsaccades in frequency, amplitude, and peak velocity.
The frequency of monocular microsaccades varied with task demands, occurring more during fixation than discrimination.
During discrimination, monocular microsaccades were more prevalent near the discrimination threshold, especially in the dominant eye and during successful trials.

Conclusions:

Monocular microsaccades represent a distinct class of eye movements with unique properties.
These movements appear to play a functional role in fine-tuning eye position and vergence during challenging visual tasks.