Cited by 289Neuroscience and Neural EngineeringTactile and Sensory InteractionsAssistive Technology in Communication and Mobility

Blind subjects implanted with the Argus II retinal prosthesis are able to improve performance in a spatial-motor task

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Ahuja, A. K., Dorn, J. D., Caspi, A., McMahon, M. J., Dagnelie, G., daCruz, L., Stanga, P., Humayun, M. S. +2 more·2011·British Journal of Ophthalmology

Abstract

BACKGROUND/AIMS: To determine to what extent subjects implanted with the Argus II retinal prosthesis can improve performance compared with residual native vision in a spatial-motor task. METHODS: High-contrast square stimuli (5.85 cm sides) were displayed in random locations on a 19″ (48.3 cm) touch screen monitor located 12″ (30.5 cm) in front of the subject. Subjects were instructed to locate and touch the square centre with the system on and then off (40 trials each). The coordinates of the square centre and location touched were recorded. RESULTS: Ninety-six percent (26/27) of subjects showed a significant improvement in accuracy and 93% (25/27) show a significant improvement in repeatability with the system on compared with off (p<0.05, Student t test). A group of five subjects that had both accuracy and repeatability values <250 pixels (7.4 cm) with the system off (ie, using only their residual vision) was significantly more accurate and repeatable than the remainder of the cohort (p<0.01). Of this group, four subjects showed a significant improvement in both accuracy and repeatability with the system on. CONCLUSION: In a study on the largest cohort of visual prosthesis recipients to date, we found that artificial vision augments information from existing vision in a spatial-motor task. Clinical trials registry no NCT00407602.

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Authors
Ahuja, A. K., Dorn, J. D., Caspi, A., McMahon, M. J., Dagnelie, G., daCruz, L., Stanga, P., Humayun, M. S., Greenberg, R. J., & Argus II Study Group
Affiliations
  • Second Sight Medical Products (US)
  • Moorfields Eye Hospital (GB)
  • Manchester Royal Eye Hospital (GB)
  • Doheny Eye Institute (US)
Corresponding author
Ahuja, A. K.
Venue
British Journal of Ophthalmology
Publisher
BMJ
Published
2010-09-29
Volume
95
Issue
4
Pages
539-543
ISSN
0007-1161 (ISSN-L)
OpenAlex
W2171460754
Cited by
289
References
19
Citations by year
2026: 7 · 2025: 9 · 2024: 7 · 2023: 8 · 2022: 14 · 2021: 15 · 2020: 17 · 2019: 17 · 2018: 25 · 2017: 21 · 2016: 24 · 2015: 20 · 2014: 27 · 2013: 27 · 2012: 26
FWCI
9.94
Type
journal article
Language
en
Open access
Locations
  • British Journal of Ophthalmology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
National Eye Institute (R01EY012893, 5R01EY12893)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
  • Health Sciences › Health Professions › Occupational Therapy › Assistive Technology in Communication and Mobility
Keywords
Argus II retinal prosthesis, retinal prosthesis, visual prosthesis, visual augmentation, blind subjects, residual vision, visual acuity, task accuracy
MeSH terms
Adult, Aged, Aged, 80 and over, Blindness, Female, Humans, Male, Middle Aged, Motor Activity, Orientation, Prosthesis Design, Retina, Task Performance and Analysis, Touch, Treatment Outcome, Visual Prosthesis

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