Elon Musk’s Neuralink and others are developing devices that could provide blind people with a crude sense of sight.
Brian Bussard has 25 tiny chips in his brain. They were installed in February 2022 as part of a study testing a wireless device designed to produce rudimentary vision in blind people. Bussard is the first participant. Bussard, who’s 56, lost vision in his left eye at age 17 after his retina detached. The right eye followed in 2016, leaving him completely blind. He remembers the exact moment it happened. “It was the hardest thing I’ve ever gone through,” he says. Eventually, he learned to adapt.
When they tested the system in monkeys, it allowed the animals to recognize artificially generated letters. To restore low vision in people, estimates of the number of electrodes needed range in the hundreds to thousands. But Troyk thinks it’s not so much the number of electrodes but their location that’s important; spreading them out across the visual cortex could produce more spots of light across a larger visual field. The tradeoff though, is that that could mean a more invasive surgery.
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