Cited by 111Neuroscience and Neural EngineeringRetinal Development and DisordersAdvanced Memory and Neural Computing

Photovoltaic retinal prosthesis restores high-resolution responses to single-pixel stimulation in blind retinas

Open access
Chenais, Naïg Aurelia Ludmilla, Airaghi Leccardi, Marta Jole Ildelfonsa, Ghezzi, Diego·2021·Communications Materials

Published version of a preprint

Abstract

Abstract Retinal prostheses hold the promise of restoring vision in totally blind people. However, a decade of clinical trials highlighted quantitative limitations hampering the possibility of reaching this goal. A key challenge in retinal stimulation is to independently activate retinal neurons over a large portion of the subject’s visual field. Reaching such a goal would significantly improve the perception accuracy in retinal implants’ users, along with their spatial cognition, attention, ambient mapping and interaction with the environment. Here we show a wide-field, high-density and high-resolution photovoltaic epiretinal prosthesis for artificial vision (POLYRETINA). The prosthesis embeds 10,498 physically and functionally independent photovoltaic pixels, allowing for wide retinal coverage and high-resolution stimulation. Single-pixel illumination reproducibly induced network-mediated responses from retinal ganglion cells at safe irradiance levels. Furthermore, POLYRETINA allowed response discrimination with a high spatial resolution equivalent to the pixel pitch (120 µm) thanks to the network-mediated stimulation mechanism. This approach could allow mid-peripheral artificial vision in patients with retinitis pigmentosa.

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Crossref · 10.1038/s43246-021-00133-2

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  • POLYRETINA reported ex-vivo a spatial resolution of 120 μm (or 20/480) equivalent to the electrode separation.

    “POLYRETINA reported ex-vivo a spatial resolution of 120 µm (or 20/480) equivalent to the electrode separation [132].”
  • POLYRETINA is a high-density wide-field epiretinal prosthesis containing 10,498 photovoltaic pixels distributed over an active area of approximately 43°.

    “POLYRETINA is a high-density wide-field epiretinal prosthesis containing 10 498 photovoltaic pixels distributed over an active area of approximately 43 • [38,39,131,132].”

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Cites

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Research works printed but not linked: 3

  1. Gabel, V. P.) 29-45 (Springer International Publishing, 2017).
  2. Gabel, V. P.) 65-83 (Springer International Publishing, 2017).
  3. Chuang, A. T., Margo, C. E. & Greenberg, P. B. Retinal implants: a systematic review. Br. J. Ophthalmol. 98, 2013 (2014).

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Authors
Chenais, N. A. L., Airaghi Leccardi, M. J. I., & Ghezzi, D.
Affiliations
École Polytechnique Fédérale de Lausanne (CH)
Corresponding author
Ghezzi, Diego
Venue
Communications Materials
Published
2021-03-05
Volume
2
Issue
1
ISSN
2662-4443 (ISSN-L)
OpenAlex
W3134642074
Cited by
110
References
107
Citations by year
2026: 11 · 2025: 20 · 2024: 32 · 2023: 17 · 2022: 18 · 2021: 10 · 2020: 2
FWCI
8.90
Type
journal article
Language
en
Open access
Locations
  • Communications Materials (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Velux Stiftung (1102)
  • Gebert Rüf Stiftung (GRS-035/17)
  • Fondation Pierre Mercier pour la Science Fondation Pro Visu
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Memory and Neural Computing
Keywords
retinal prosthesis, epiretinal implants, retinitis pigmentosa, retinal ganglion cells, spatial resolution, artificial vision

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