Virtual reality validation of naturalistic modulation strategies to counteract fading in retinal stimulation.

Détails

ID Serval
serval:BIB_A294E910A5EF
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Virtual reality validation of naturalistic modulation strategies to counteract fading in retinal stimulation.
Périodique
Journal of neural engineering
Auteur⸱e⸱s
Thorn J.T., Chenais NAL, Hinrichs S., Chatelain M., Ghezzi D.
ISSN
1741-2552 (Electronic)
ISSN-L
1741-2552
Statut éditorial
Publié
Date de publication
29/03/2022
Peer-reviewed
Oui
Volume
19
Numéro
2
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Résumé
Objective. Temporal resolution is a key challenge in artificial vision. Several prosthetic approaches are limited by the perceptual fading of evoked phosphenes upon repeated stimulation from the same electrode. Therefore, implanted patients are forced to perform active scanning, via head movements, to refresh the visual field viewed by the camera. However, active scanning is a draining task, and it is crucial to find compensatory strategies to reduce it.Approach. To address this question, we implemented perceptual fading in simulated prosthetic vision using virtual reality. Then, we quantified the effect of fading on two indicators: the time to complete a reading task and the head rotation during the task. We also tested if stimulation strategies previously proposed to increase the persistence of responses in retinal ganglion cells to electrical stimulation could improve these indicators.Main results. This study shows that stimulation strategies based on interrupted pulse trains and randomisation of the pulse duration allows significant reduction of both the time to complete the task and the head rotation during the task.Significance. The stimulation strategy used in retinal implants is crucial to counteract perceptual fading and to reduce active head scanning during prosthetic vision. In turn, less active scanning might improve the patient's comfort in artificial vision.
Mots-clé
Electric Stimulation, Humans, Phosphenes, Retina, Retinal Ganglion Cells, Virtual Reality, Vision, Ocular, Visual Prosthesis, artificial vision, fading, retinal prostheses, scanning, simulated prosthetic vision, virtual reality
Pubmed
Web of science
Open Access
Oui
Création de la notice
21/03/2024 13:00
Dernière modification de la notice
22/03/2024 8:25
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