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Related Experiment Video

Updated: Apr 17, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

Published on: August 4, 2018

Binocular eye tracking with the Tracking Scanning Laser Ophthalmoscope.

S B Stevenson¹, C K Sheehy¹, A Roorda¹

¹University of Houston College of Optometry, Berkeley School of Optometry, USA; University of California, Berkeley School of Optometry, USA.

Vision Research

|February 14, 2015

Summary

This study introduces a novel binocular retinal imaging technique for precise eye motion tracking. The system achieves high temporal and spatial resolution, enabling detailed analysis of ocular motility.

Keywords:

Binocular coordination Fixational eye movements Retinal imaging

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Area of Science:

Ophthalmology
Biomedical Engineering
Neuroscience

Background:

High-magnification retinal imaging allows precise eye motion tracking (<1 arc minute).
Existing systems typically provide only monocular recordings.
Simultaneous binocular tracking offers enhanced data for studying ocular motility.

Purpose of the Study:

To describe a modification of the Tracking Scanning Laser Ophthalmoscope for simultaneous binocular retinal scanning.
To evaluate the precision and resolution of this new binocular eye-tracking system.
To compare binocular tracking results with existing monocular techniques.

Main Methods:

A modified Tracking Scanning Laser Ophthalmoscope splits the optical path to scan both retinas simultaneously.
A mirror redirects half of each horizontal scan line to the fellow eye, creating a split-image video.
Fast Fourier Transform (FFT)-based image analysis in Matlab extracts eye position from recorded videos.

Main Results:

The binocular system achieves high temporal and spatial resolution for eye movement traces.
Tracking noise levels were estimated between 0.25–0.5 arcmin SD for individual subjects.
Binocular recordings showed left/right eye differences of 1–2 arcmin SD vertically and 10–15 arcmin SD horizontally.

Conclusions:

The developed binocular retinal imaging system enables simultaneous, high-resolution tracking of eye motion.
This technique provides valuable data for understanding binocular ocular motility.
The results align with established values from other eye-tracking methodologies.