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Better 'Map' of the Lights You See When You Close Your Eyes Can Improve 'Bionic Eye' Outcomes

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The Gennaris cortical implant.

Cortical visual prostheses are devices implanted onto the brain with the aim of restoring sight by directly stimulating the area responsible for vision, the visual cortex.

Credit: Monash University (Australia)

A method of mapping phosphenes developed by researchers at Australia's Monash University could help patients receiving cortical visual protheses achieve better surgical outcomes.

Cortical visual prostheses, which are implanted on the brain to stimulate the visual cortex to restore a patient's eyesight, feature an array of electrodes intended to trigger phosphenes, the visual perception of bright flashes seen when the eyes are closed.

Optimal electrode placement is important, but each patient has a unique phosphene map.

The researchers used a retinotopy dataset based on magnetic resonance imaging scans, consultations with a neurosurgeon regarding realistic electrode implantation sites, and a clustering algorithm to identify the ideal regions for implantation.

From Monash University (Australia)
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Abstracts Copyright © 2023 SmithBucklin, Washington, D.C., USA


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