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High-resolution eye-tracking via digital imaging of Purkinje reflections

Reliably measuring eye movements and determining where the observer looks are fundamental needs in vision science. A classical approach to achieve high-resolution oculomotor measurements is the so-called dual Purkinje image (DPI) method, a technique that relies on the relative motion of the reflecti...

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Autores principales: Wu, Ruei-Jr, Clark, Ashley M., Cox, Michele A., Intoy, Janis, Jolly, Paul C., Zhao, Zhetuo, Rucci, Michele
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Association for Research in Vision and Ophthalmology 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10166114/
https://www.ncbi.nlm.nih.gov/pubmed/37140912
http://dx.doi.org/10.1167/jov.23.5.4
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author Wu, Ruei-Jr
Clark, Ashley M.
Cox, Michele A.
Intoy, Janis
Jolly, Paul C.
Zhao, Zhetuo
Rucci, Michele
author_facet Wu, Ruei-Jr
Clark, Ashley M.
Cox, Michele A.
Intoy, Janis
Jolly, Paul C.
Zhao, Zhetuo
Rucci, Michele
author_sort Wu, Ruei-Jr
collection PubMed
description Reliably measuring eye movements and determining where the observer looks are fundamental needs in vision science. A classical approach to achieve high-resolution oculomotor measurements is the so-called dual Purkinje image (DPI) method, a technique that relies on the relative motion of the reflections generated by two distinct surfaces in the eye, the cornea and the back of the lens. This technique has been traditionally implemented in fragile and difficult to operate analog devices, which have remained exclusive use of specialized oculomotor laboratories. Here we describe progress on the development of a digital DPI, a system that builds on recent advances in digital imaging to enable fast, highly precise eye-tracking without the complications of previous analog devices. This system integrates an optical setup with no moving components with a digital imaging module and dedicated software on a fast processing unit. Data from both artificial and human eyes demonstrate subarcminute resolution at 1 kHz. Furthermore, when coupled with previously developed gaze-contingent calibration methods, this system enables localization of the line of sight within a few arcminutes.
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spelling pubmed-101661142023-05-09 High-resolution eye-tracking via digital imaging of Purkinje reflections Wu, Ruei-Jr Clark, Ashley M. Cox, Michele A. Intoy, Janis Jolly, Paul C. Zhao, Zhetuo Rucci, Michele J Vis Methods Reliably measuring eye movements and determining where the observer looks are fundamental needs in vision science. A classical approach to achieve high-resolution oculomotor measurements is the so-called dual Purkinje image (DPI) method, a technique that relies on the relative motion of the reflections generated by two distinct surfaces in the eye, the cornea and the back of the lens. This technique has been traditionally implemented in fragile and difficult to operate analog devices, which have remained exclusive use of specialized oculomotor laboratories. Here we describe progress on the development of a digital DPI, a system that builds on recent advances in digital imaging to enable fast, highly precise eye-tracking without the complications of previous analog devices. This system integrates an optical setup with no moving components with a digital imaging module and dedicated software on a fast processing unit. Data from both artificial and human eyes demonstrate subarcminute resolution at 1 kHz. Furthermore, when coupled with previously developed gaze-contingent calibration methods, this system enables localization of the line of sight within a few arcminutes. The Association for Research in Vision and Ophthalmology 2023-05-04 /pmc/articles/PMC10166114/ /pubmed/37140912 http://dx.doi.org/10.1167/jov.23.5.4 Text en Copyright 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
spellingShingle Methods
Wu, Ruei-Jr
Clark, Ashley M.
Cox, Michele A.
Intoy, Janis
Jolly, Paul C.
Zhao, Zhetuo
Rucci, Michele
High-resolution eye-tracking via digital imaging of Purkinje reflections
title High-resolution eye-tracking via digital imaging of Purkinje reflections
title_full High-resolution eye-tracking via digital imaging of Purkinje reflections
title_fullStr High-resolution eye-tracking via digital imaging of Purkinje reflections
title_full_unstemmed High-resolution eye-tracking via digital imaging of Purkinje reflections
title_short High-resolution eye-tracking via digital imaging of Purkinje reflections
title_sort high-resolution eye-tracking via digital imaging of purkinje reflections
topic Methods
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10166114/
https://www.ncbi.nlm.nih.gov/pubmed/37140912
http://dx.doi.org/10.1167/jov.23.5.4
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