Trade-off between field-of-view and resolution in the thermal-integrated argus II system

Yingchen He; Natalie T. Huang; Avi Caspi; Arup Roy; Sandra R. Montezuma

doi:10.1167/tvst.8.4.29

Trade-off between field-of-view and resolution in the thermal-integrated argus II system

Yingchen He, Natalie T. Huang, Avi Caspi, Arup Roy, Sandra R. Montezuma

Ophthalmology & Visual Neurosciences

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

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 188 ☓118 FOV and a 3:1 mapping (zoom out) that provided 498 ☓358 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 ¼ 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 ¼ 0.055). Conclusions: Argus II wearers can efficiently find heat-emitting objects with the default 188 ☓118 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.

Original language	English (US)
Article number	29
Journal	Translational Vision Science and Technology
Volume	8
Issue number	4
DOIs	https://doi.org/10.1167/tvst.8.4.29
State	Published - Jul 2019

Bibliographical note

Funding Information:
The authors thank Jessy Dorn for her generous help in critically reviewing the manuscript. Sponsorship and article processing charges for this study were funded by the Center for Applied Translational Sensory Science at the University of Minnesota, the Minnesota Lions Vision Foundation, the VitreoRet-inal Surgery Foundation, and an unrestricted grant to the Department of Ophthalmology and Visual Neurosciences from the Research to Prevent Blindness (RPB), New York, NY, USA.

Publisher Copyright:
© 2019 The Authors.

Keywords

Field-of-view
Rehabilitation
Spatial resolution
Ultralow vision
Visual prosthesis

Access

10.1167/tvst.8.4.29

OpenUrl availability

Full text

Cite this

@article{d367364c94994a0186ad1405291d84de,

title = "Trade-off between field-of-view and resolution in the thermal-integrated argus II system",

abstract = "Purpose: To investigate the effect of a wider field-of-view (FOV) of a retinal prosthesis on the users{\textquoteright} 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 188 ☓118 FOV and a 3:1 mapping (zoom out) that provided 498 ☓358 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 ¼ 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 ¼ 0.055). Conclusions: Argus II wearers can efficiently find heat-emitting objects with the default 188 ☓118 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.",

keywords = "Field-of-view, Rehabilitation, Spatial resolution, Ultralow vision, Visual prosthesis",

author = "Yingchen He and Huang, {Natalie T.} and Avi Caspi and Arup Roy and Montezuma, {Sandra R.}",

note = "Funding Information: The authors thank Jessy Dorn for her generous help in critically reviewing the manuscript. Sponsorship and article processing charges for this study were funded by the Center for Applied Translational Sensory Science at the University of Minnesota, the Minnesota Lions Vision Foundation, the VitreoRet-inal Surgery Foundation, and an unrestricted grant to the Department of Ophthalmology and Visual Neurosciences from the Research to Prevent Blindness (RPB), New York, NY, USA. Publisher Copyright: {\textcopyright} 2019 The Authors.",

year = "2019",

month = jul,

doi = "10.1167/tvst.8.4.29",

language = "English (US)",

volume = "8",

journal = "Translational Vision Science and Technology",

issn = "2164-2591",

publisher = "Association for Research in Vision and Ophthalmology Inc.",

number = "4",

}

TY - JOUR

T1 - Trade-off between field-of-view and resolution in the thermal-integrated argus II system

AU - He, Yingchen

AU - Huang, Natalie T.

AU - Caspi, Avi

AU - Roy, Arup

AU - Montezuma, Sandra R.

N1 - Funding Information: The authors thank Jessy Dorn for her generous help in critically reviewing the manuscript. Sponsorship and article processing charges for this study were funded by the Center for Applied Translational Sensory Science at the University of Minnesota, the Minnesota Lions Vision Foundation, the VitreoRet-inal Surgery Foundation, and an unrestricted grant to the Department of Ophthalmology and Visual Neurosciences from the Research to Prevent Blindness (RPB), New York, NY, USA. Publisher Copyright: © 2019 The Authors.

PY - 2019/7

Y1 - 2019/7

N2 - 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 188 ☓118 FOV and a 3:1 mapping (zoom out) that provided 498 ☓358 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 ¼ 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 ¼ 0.055). Conclusions: Argus II wearers can efficiently find heat-emitting objects with the default 188 ☓118 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.

AB - 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 188 ☓118 FOV and a 3:1 mapping (zoom out) that provided 498 ☓358 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 ¼ 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 ¼ 0.055). Conclusions: Argus II wearers can efficiently find heat-emitting objects with the default 188 ☓118 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.

KW - Field-of-view

KW - Rehabilitation

KW - Spatial resolution

KW - Ultralow vision

KW - Visual prosthesis

UR - http://www.scopus.com/inward/record.url?scp=85071431385&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071431385&partnerID=8YFLogxK

U2 - 10.1167/tvst.8.4.29

DO - 10.1167/tvst.8.4.29

M3 - Article

C2 - 31440426

AN - SCOPUS:85071431385

SN - 2164-2591

VL - 8

JO - Translational Vision Science and Technology

JF - Translational Vision Science and Technology

IS - 4

M1 - 29

ER -

Trade-off between field-of-view and resolution in the thermal-integrated argus II system

Abstract

Bibliographical note

Keywords

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this