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Proceedings 2017, 1(4), 315;

Protuberant Electrode Structures for New Retinal Implants

University Paris Est, ESYCOM-ESIEE-MLV, France
Institute of Vision, Paris, France
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 9 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
PDF [608 KB, uploaded 14 August 2017]


Focal stimulation of neural tissue is a challenge in retinal prosthetic devices in which the aim is to improve the spatial resolution of the stimulation and therefore increase the electrode density of the prosthetic devices. Our work intends to create a new implant able to enhance the focalisation of the stimulation signal through protuberant electrodes. These electrodes are micro fabricated on a soft polyimide substrate using classical metal electrodeposition techniques. Before proceeding with fabrication a FEM model of the electrode’s current density was done to select the best-performing structures and geometries in terms of local stimulation. Based on these models, several prototypes were fabricated and implanted in vivo into a rat’s eye to verify the adaptation to the retina tissue.
Keywords: microfabrication; retinal prostheses; implantable device; 3D electrode; retinal stimulation microfabrication; retinal prostheses; implantable device; 3D electrode; retinal stimulation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Losada, P.G.; Rousseau, L.; Grzeskowiak, M.; Degardin, J.; Berhanu, S.; Dubus, E.; Picaud, S.; Lissorgues, G. Protuberant Electrode Structures for New Retinal Implants. Proceedings 2017, 1, 315.

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