Scientists have created a new device which will help blind people to see – by using their tongue. The Tongue Display Unit…..


, developed by researchers at the University of Wisconsin, can activate areas which are normally reserved for visual information and are unused when someone suffers from congenital blindness.



Within the first few minutes of testing the prototype, subjects are able to build up a fairly clear picture of the letters placed in various positions and transmitted by electrical impulses to the device on their tongue.



Professor Maurice Ptito, who validated tests on the device, said: “The tongue will never replace the eye, but for people born blind the cerebral cortex, which is normally used for vision, is reactivated by this device. The electrical activity, recorded by a scan, is very clear about this.”



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