Using a video-based eye tracker to analyse the binocular near-reflex dynamics response
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Título: | Using a video-based eye tracker to analyse the binocular near-reflex dynamics response |
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Autor/es: | Espinosa, Julián | Archid, Kauzar | Pérez Rodríguez, Jorge | Perales, Esther |
Grupo/s de investigación o GITE: | Grupo de Análisis de Imagen, Sistemas Ópticos y Visión (IMAOS+V) | Visión y Color |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Palabras clave: | Accommodation | Convergence | Near-reflex response | Pupillary accommodation | Video-based eye tracker |
Fecha de publicación: | 20-jul-2023 |
Editor: | John Wiley & Sons |
Cita bibliográfica: | Ophthalmic and Physiological Optics. 2023, 43(6): 1540-1549. https://doi.org/10.1111/opo.13203 |
Resumen: | Purpose: This study presents a novel video-based eye-tracking system for analysing the dynamics of the binocular near-reflex response. The system enables the simultaneous measurement of convergence, divergence and pupillary size during accommodation and disaccommodation to aid the comprehensive understanding of the three-component near-reflex. Methods: A high-speed (90 Hz) video-based eye tracker was used to capture changes in eye gaze and pupil radius in 15 participants in response to altering stimulus conditions. An offline analysis involved separating the gaze vector components and pupil radius, which were fitted to a hyperbolic tangent function to characterise the dynamics of the near-reflex process. Results: Significant differences in the temporal parameters of the pupil radius were observed between the near-to-far and far-to-near vision changes, with faster miosis compared with mydriasis. Additionally, differences in response times were found between gaze angle components, with longer convergence times compared to changes in the vertical direction (saccades). The steady-state values of the gaze components and pupil radius were in line with theoretical expectations and previous reports. Conclusions: The proposed system provides a non-invasive, portable and cost-effective method for evaluating near-reflex dynamics under natural viewing conditions using a video-based eye tracker. The sampling rate ensures the accurate assessment of vergence eye movements and pupillary dynamics. By simultaneously measuring eye convergence, divergence and pupil size, the system offers a more comprehensive assessment of the near-reflex response. This makes it a valuable tool for clinical diagnosis, research studies and investigating the effects of near work on the visual system. |
Patrocinador/es: | This work was funded by Universidad de Alicante, participating CRUE-CSIC institution. |
URI: | http://hdl.handle.net/10045/136327 |
ISSN: | 0275-5408 (Print) | 1475-1313 (Online) |
DOI: | 10.1111/opo.13203 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 The Authors. Ophthalmic and Physiological Optics published by John Wiley & Sons Ltd on behalf of College of Optometrists. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1111/opo.13203 |
Aparece en las colecciones: | INV - IMAOS+V - Artículos de Revistas INV - GVC - Artículos de Revistas |
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Espinosa_etal_2023_OphthalmicPhysiolOpt.pdf | 3,48 MB | Adobe PDF | Abrir Vista previa | |
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