The BrainPort operates by acquiring an image stream from a camera, similar to a camcorder. Like a camcorder, the moving images are sent to a display, which, in this case, is the electrode array on the tongue. The image stream is displayed on the tongue by converting light information to electrical stimulation, which feels like microscopic bubbles to the user. With minimal training, users learn to interpret the images on their tongue as information about the scene in front of them.
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