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Related Experiment Video

Updated: Jul 19, 2026

How to Build a Dichoptic Presentation System That Includes an Eye Tracker
05:48

How to Build a Dichoptic Presentation System That Includes an Eye Tracker

Published on: September 6, 2017

A new method for eye location tracking.

Eugene Paperno1, Dmitry Semyonov

  • 1Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel. paperno@ee.bgu.ac.il

IEEE Transactions on Bio-Medical Engineering
|October 17, 2003
PubMed
Summary

This study introduces a novel scleral search coil (SSC) system for precise eye tracking. The new method directly computes eye location, reducing errors and improving accuracy for eye movement research.

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Minimizing crosstalk in three-axial induction magnetometers.

The Review of scientific instruments·2011
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Magnetic eye tracking: a new approach employing a planar transmitter.

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Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Neuroscience

Background:

  • Standard scleral search coil (SSC) systems rely on indirect eye location computation using transitional magnetic sensors.
  • These traditional methods are prone to systematic errors due to sensor placement and orthogonality inaccuracies.
  • Accurate eye tracking is crucial for understanding visual perception and neurological disorders.

Purpose of the Study:

  • To develop and validate a novel eye tracking method using direct magnetic coupling with a scleral search coil (SSC).
  • To eliminate systematic errors associated with indirect measurement techniques in eye movement recording.
  • To assess the accuracy and operating range of the proposed SSC system.

Main Methods:

  • Utilized direct magnetic coupling between transmitting coils and the SSC for eye location computation.

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Last Updated: Jul 19, 2026

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  • Incorporated SSC orientation components into the location-tracking algorithm.
  • Compared a single-transmitter system (with limited orientation freedom) against a triad-transmitter system (for full orientation freedom).
  • Validated analytical results through computer simulations.

    • Main Results:

    • The novel method eliminates systematic errors from transitional sensor inaccuracies and imperfect orthogonality.
    • Accurate eye location tracking is achievable with a single transmitter if eye orientation is limited.
    • A triad of transmitters enables precise eye tracking without orientation limitations.
    • Achieved accuracy of +/- 1 mm within a 200-Hz bandwidth over a 0.5 x 0.5 x 0.5 m operating region.

    Conclusions:

    • The direct magnetic coupling method offers a significant improvement over traditional indirect eye tracking techniques.
    • The proposed SSC system provides high accuracy and a substantial operating volume for eye movement analysis.
    • This advancement has implications for research in vision science, neuroscience, and clinical ophthalmology.