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Seeing with Your Tongue | The New Yorker

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Sensory-substitution devices help blind and deaf people, but that’s just the beginning.

Save this story Save this story According to one scientist, “You don’t see with the eyes. You see with the brain.” Illustration by Chad Hagen The climbers at Earth Treks gym, in Golden, Colorado, were warming up: stretching, strapping themselves into harnesses, and chalking their hands as they prepared to scale walls stippled with multicolored plastic holds. Seated off to one side, with a slim gray plastic band wrapped around his brow, Erik Weihenmayer was warming up, too—by reading flash cards. “I see an ‘E’ at the end,” he said, sweeping his head over the top card, from side to side and up a

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