Tongue device helps blind soldier 'see'

A soldier blinded by a grenade in Iraq today described how his life has been transformed by ground-breaking technology that enables him to "see" with his tongue.

Lance Corporal Craig Lundberg, 24, from Walton, Liverpool, can read words, identify shapes and walk around unaided thanks to the BrainPort device, despite being totally blind.

The Liverpool fan, who plays blind football for England, lost his sight after being struck by a rocket propelled grenade while serving in Basra in 2007.

He was faced with the prospect of relying on a guide dog or cane for the rest of his life.

But he was chosen by the Ministry of Defence (MoD) to be the first person to trial a pioneering device - the BrainPort, which could revolutionise treatment for the blind.

The BrainPort converts visual images into a series of electrical pulses which are sent to the tongue, the different strength of the tingles can be read or interpreted so the user can mentally visualise their surroundings and navigate around objects.

The device is comprised of a tiny video camera attached to a pair of sunglasses which are linked to a plastic "lolly pop" which the user places on their tongue to read the electrical pulses.

L/Cpl Lundberg explained: "It feels like licking a nine volt battery or like popping candy.

"The camera sends signals down onto the lolly pop and onto your tongue, you can then determine what they mean and transfer it to shapes.

"You get lines and shapes of things, it sees in black and white so you get a two dimensional image on your tongue, it's a bit like a pins and needles sensation.

"It's only a prototype, but the potential to change my life is massive, it's got a lot of potential to advance things for blind people.

"One of the things it has enabled me to do is pick up objects straight away, I can reach out and pick them up when before I would be fumbling around to feel for them."

The BrainPort was created in the US.

L/Cpl Lundberg added: "There no way I'm getting rid of my guide dog Hugo though - I love him.

"This is another mobility device, it's not the be all and end all of my disability.

The MoD said it expected to pay the US around £18,000 for the device and training to enable the trial to take place.

Unveiling the BrainPort at the MoD headquarters in Whitehall, US Major General Gale Pollock who worked on the scheme, said the BrainPort has 400 points sending information to the tongue connection.

Designers plan to expand this to 4,000 points which would vastly upgrade the clarity of the image.

Users cannot speak or eat while using the BrainPort so designers are hoping to create a smaller device that could be permanently fixed behind the teeth or to the roof of the mouth enabling more natural use.

She explained: "It's just so exciting to finally be able to say to people here is a tool that may help you and start to restore hope to the visually impaired community, it's just wonderful."

Group Captain Rob Scott who is L/Cpl Lundberg's eye doctor, travelled to the US for the BrainPort trials.

Explaining the workings of the BrainPort, he said: "It is certainly a device with absolutely huge potential.

"The BrainPort is a device that effectively lets blind people see through their tongue. What it uses is electro-tactile stimulation as a sensory substitution for vision.

"An image is captured by a camera mounted on a pair of spectacles and that pixilated image is translated onto an array of electrodes that's placed on the tongue so something that is darker could be made to tingle more and that sensation on the tongue corresponds to the image that is picked up by the individual and they have to learn what that image actually represents.

"It allows an image of their surroundings to be experienced and helps find your way about a place, it is designed to help orientation in an unfamiliar environment."