A British soldier blinded by a grenade can now "see" using his tongue. A prototype system called the BrainPort converts images to electrical signals which are sent to a plastic "lolly pop" that the user puts in their mouth. The learning curve—users have to be taught to translate an electric "pins and needles" sensation into meaningful information—sounds a bit rough, and you can't use the BrainPort while eating or talking. But the soldier can now locate and pick up objects without help or fumbling.
Wounded vet gets seeing-eye tongue
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