Toward higher resolution in photovoltaic restoration of sight

Zhijie Charles Chen; Bing-Yi Wang; Tiffany Huang; Mohajeet Bhuckory; Elton Ho; Emma Butt; Andrew Shin; Ted Kamins; Ludwig Galambos; Keith Mathieson; Daniel Palanker

doi:10.1117/12.2583337

5 March 2021 Toward higher resolution in photovoltaic restoration of sight

Zhijie Charles Chen, Bing-Yi Wang, Tiffany Huang, Mohajeet Bhuckory, Elton Ho, Emma Butt, Andrew Shin, Ted Kamins, Ludwig Galambos, Keith Mathieson, Daniel Palanker

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Proceedings Volume 11623, Ophthalmic Technologies XXXI; 116230W (2021) https://doi.org/10.1117/12.2583337
Event: SPIE BiOS, 2021, Online Only

Abstract

Photovoltaic retinal prosthesis is designed to restore sight in patients who lost central vision due to atrophic AMD. Subretinal pixels convert pulsed NIR light projected from augmented-reality glasses into electric current, stimulating the nearby inner retinal neurons. In patients with geographic atrophy, such prosthetic central vision coexists with natural peripheral sight, and its acuity closely matches the 100um pixel pitch of the implant. We present a progress toward 20um pixels based on honeycomb configuration of the stimulating arrays with return electrodes elevated on vertical walls, designed to leverage retinal migration for decoupling the stimulation threshold from pixel size.

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Zhijie Charles Chen, Bing-Yi Wang, Tiffany Huang, Mohajeet Bhuckory, Elton Ho, Emma Butt, Andrew Shin, Ted Kamins, Ludwig Galambos, Keith Mathieson, and Daniel Palanker "Toward higher resolution in photovoltaic restoration of sight", Proc. SPIE 11623, Ophthalmic Technologies XXXI, 116230W (5 March 2021); https://doi.org/10.1117/12.2583337

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