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According to the British "Times" report, the United States has introduced a special brain vision device that relies on the nerves on the surface of the blind tongue to transmit light signals to the brain, thus helping the blind to "see" the world. Researchers say this could revolutionize the lives of the blind.
The Brain Vision, called BrainPort, was developed by Wicab of Wisconsin, USA. The main accessories include a pair of sunglasses with hidden cameras, a handheld controller, a central processor and a stick. A sugar-like electrode sheet. "Lollipop" is a 9 square centimeter, matrix-arranged electrode set that will fit directly over the tongue.
The miniature concealed camera on the glasses is responsible for collecting visible light data. After the user wears the special glasses, the visible light data will bypass the eyes and be transmitted to the handheld controller. The central processor is responsible for converting the digital signals into electronic pulses. The posterior signal is transmitted to the tongue through the "lollipop" electrode piece, allowing the tongue to sense the image of the object, which is then transmitted to the brain by the nerves on the tongue.
The electronic pulses are coded in space, which means that the tongue can sense depth, angle, size and shape when receiving these signals. This information is then converted into images by the human brain, but due to the low resolution, the images currently produced are still blurred.
The 24-year-old Craig Lundberg became the user of the first "brain port" device. In 2007, Lundberg was attacked by a grenade during the Iraq war, causing his right eye to be completely blind. He desperately thought that he had to rely on the guidance of a guide dog or others for the rest of his life. However, he was fortunate enough to be selected by the British Ministry of Defence and became the first experiencer. With this device, Lundberg was able to correctly read the three-letter words on the card 1 meter away, such as CAT; he could also see the outline of the object and walk independently.
Lundeb said that the device would allow him to clear the "roadblock" on the way forward, not to be tripped, and greatly change his life, but it is just a mobile device, not a panacea, nor will it Let him be exactly the same as a normal person.
Researchers say that at present, the "brain port" "lollipop" electrode device has 400 points that can send information to the tongue. They want to expand the number of points to 4000 to greatly improve the accuracy of the image.
However, the shortcoming of the "brain port" is that blind users can't talk or eat while "seeing" the world around them. Designers hope to make smaller devices that can be permanently placed. The back of the teeth or the upper part of the mouth makes it easier for people to use.
(Source: Technology Daily)
