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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2023
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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. |
format | Online Article Text |
id | pubmed-10166114 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
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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