Journal article

Global activity shaping strategies for a retinal implant

Martin J Spencer, Tatiana Kameneva, David B Grayden, Hamish Meffin, Anthony N Burkitt

Journal of Neural Engineering | IOP Publishing | Published : 2019

Abstract

Objective. Retinal prostheses provide visual perception via electrical stimulation of the retina using an implanted array of electrodes. The retinal activation resulting from each electrode is not point-like; instead each electrode introduces a spread of retinal activation that may overlap with activations from other electrodes. With most conventional stimulation strategies this overlap leads to image blur. Here we propose a 'shaping' algorithm that uses multiple electrodes to manipulate the current between electrodes in a desired way. Approach. We assume a forward model for the conversion of electrode strengths to retinal activation. Three alternative global shaping algorithms are developed..

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Grants

Awarded by Australian Research Council


Awarded by Australian Research Council Centre of Excellence for Integrative Brain Function


Awarded by NHMRC


Funding Acknowledgements

This project was supported by the Australian Research Council's Discovery Projects funding scheme (Project DP140104533). HM acknowledges funding from the Australian Research Council Centre of Excellence for Integrative Brain Function (Project CE140100007). HM, TK, DBG, and ANB acknowledge partial support of NHMRC Project grant 1106390.