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Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System

PURPOSE: To investigate the effect of a wider field-of-view (FOV) of a retinal prosthesis on the users' performance in locating objects. METHODS: One female and four male subjects who were blind due to end-stage retinitis pigmentosa and had been implanted with the Argus II retinal prosthesis pa...

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Autores principales: He, Yingchen, Huang, Natalie T., Caspi, Avi, Roy, Arup, Montezuma, Sandra R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Association for Research in Vision and Ophthalmology 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6701876/
https://www.ncbi.nlm.nih.gov/pubmed/31440426
http://dx.doi.org/10.1167/tvst.8.4.29
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author He, Yingchen
Huang, Natalie T.
Caspi, Avi
Roy, Arup
Montezuma, Sandra R.
author_facet He, Yingchen
Huang, Natalie T.
Caspi, Avi
Roy, Arup
Montezuma, Sandra R.
author_sort He, Yingchen
collection PubMed
description PURPOSE: To investigate the effect of a wider field-of-view (FOV) of a retinal prosthesis on the users' performance in locating objects. METHODS: One female and four male subjects who were blind due to end-stage retinitis pigmentosa and had been implanted with the Argus II retinal prosthesis participated (aged 63.4 ± 15.4). Thermal imaging was captured by an external sensor and converted to electrical stimulation to the retina. Subjects were asked to localize and to reach for heat-emitting objects using two different FOV mappings: a normal 1:1 mapping (no zoom) that provided 18° × 11° FOV and a 3:1 mapping (zoom out) that provided 49° × 35° FOV. Their accuracy and response time were recorded. RESULTS: Subjects were less accurate and took longer to complete the tasks with zoom out compared to no zoom. Localization accuracy decreased from 83% (95% confidence interval, 75%, 90%) with no zoom to 76% (67%, 83%) with zoom out (P = 0.07). Reaching accuracy differed between the two mappings only in one subject. Response time increased by 43% for the localization task (24%, 66%; P < 0.001) and by 20% for the reaching task (0%, 45%; P = 0.055). CONCLUSIONS: Argus II wearers can efficiently find heat-emitting objects with the default 18° × 11° FOV of the current Argus II. For spatial localization, a higher spatial resolution may be preferred over a wider FOV. TRANSLATIONAL RELEVANCE: Understanding the trade-off between FOV and spatial resolution in retinal prosthesis users can guide device optimization.
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spelling pubmed-67018762019-08-22 Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System He, Yingchen Huang, Natalie T. Caspi, Avi Roy, Arup Montezuma, Sandra R. Transl Vis Sci Technol Articles PURPOSE: To investigate the effect of a wider field-of-view (FOV) of a retinal prosthesis on the users' performance in locating objects. METHODS: One female and four male subjects who were blind due to end-stage retinitis pigmentosa and had been implanted with the Argus II retinal prosthesis participated (aged 63.4 ± 15.4). Thermal imaging was captured by an external sensor and converted to electrical stimulation to the retina. Subjects were asked to localize and to reach for heat-emitting objects using two different FOV mappings: a normal 1:1 mapping (no zoom) that provided 18° × 11° FOV and a 3:1 mapping (zoom out) that provided 49° × 35° FOV. Their accuracy and response time were recorded. RESULTS: Subjects were less accurate and took longer to complete the tasks with zoom out compared to no zoom. Localization accuracy decreased from 83% (95% confidence interval, 75%, 90%) with no zoom to 76% (67%, 83%) with zoom out (P = 0.07). Reaching accuracy differed between the two mappings only in one subject. Response time increased by 43% for the localization task (24%, 66%; P < 0.001) and by 20% for the reaching task (0%, 45%; P = 0.055). CONCLUSIONS: Argus II wearers can efficiently find heat-emitting objects with the default 18° × 11° FOV of the current Argus II. For spatial localization, a higher spatial resolution may be preferred over a wider FOV. TRANSLATIONAL RELEVANCE: Understanding the trade-off between FOV and spatial resolution in retinal prosthesis users can guide device optimization. The Association for Research in Vision and Ophthalmology 2019-08-19 /pmc/articles/PMC6701876/ /pubmed/31440426 http://dx.doi.org/10.1167/tvst.8.4.29 Text en Copyright 2019 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
spellingShingle Articles
He, Yingchen
Huang, Natalie T.
Caspi, Avi
Roy, Arup
Montezuma, Sandra R.
Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System
title Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System
title_full Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System
title_fullStr Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System
title_full_unstemmed Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System
title_short Trade-Off Between Field-of-View and Resolution in the Thermal-Integrated Argus II System
title_sort trade-off between field-of-view and resolution in the thermal-integrated argus ii system
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6701876/
https://www.ncbi.nlm.nih.gov/pubmed/31440426
http://dx.doi.org/10.1167/tvst.8.4.29
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