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7 March 2022 Electric field shaping for high resolution in photovoltaic retinal prosthesis
Zhijie Charles Chen, Bing-Yi Wang, Mohajeet Bhuckory, Andrew Shin, Elton Ho, Valentina Zuckerman, Ludwig Galambos, Theodore Kamins, Keith Mathieson, Daniel Palanker
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Proceedings Volume PC11941, Ophthalmic Technologies XXXII; PC119410J (2022) https://doi.org/10.1117/12.2608973
Event: SPIE BiOS, 2022, San Francisco, California, United States
Abstract
Sight can be restored in patients who lost photoreceptors due to atrophic AMD by substituting them with a photovoltaic array. Subretinal pixels convert pulsed NIR light projected from augmented-reality glasses into electric current, stimulating the nearby inner retinal neurons. Patients with such implants can simultaneously use their residual peripheral sight and central prosthetic vision, and its acuity closely matches the 100um pixel size of the implant. We present two approaches to selective neural stimulation with pixel sizes down to 20um – optically configurable current steering and 3-dimensional honeycomb-shaped electrodes, both providing prosthetic acuity matching the natural resolution in rats.
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Zhijie Charles Chen, Bing-Yi Wang, Mohajeet Bhuckory, Andrew Shin, Elton Ho, Valentina Zuckerman, Ludwig Galambos, Theodore Kamins, Keith Mathieson, and Daniel Palanker "Electric field shaping for high resolution in photovoltaic retinal prosthesis", Proc. SPIE PC11941, Ophthalmic Technologies XXXII, PC119410J (7 March 2022); https://doi.org/10.1117/12.2608973
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KEYWORDS
Photovoltaics
Visualization
Electrodes
Information visualization
Neurons
Retina
Image resolution
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