"Crucially, we have achieved two things: we have built a 3D eye tracking system hundreds of times cheaper than commercial systems and used it to build a real-time brain machine interface that allows patients to interact more smoothly and more quickly than existing invasive technologies that are tens of thousands of times more expensive," he said. It is believed that this could allow people to control an electronic wheelchair simply by looking where they want to go or control a robotic prosthetic arm.ĭr Aldo Faisal, lecturer in Neurotechnology at Imperial's Department of Bioengineering and the Department of Computing, said he was confident in the ability to utilise eye movements given that six of the subjects, who had never used their eyes as a control input before, could still register a respectable score within 20 per cent of the able bodied users after just 10 minutes of using the device for the first time. The cameras constantly take pictures of the eye, working out where the pupil is pointing, and from this the researchers can use a set of calibrations to work out exactly where a person is looking on the screen.Įven more impressively, the researchers are also able to use more detailed calibrations to work out the 3D gaze of the subjects – in other words, how far into the distance they were looking. The GT3D device is made up of two fast video game console cameras, costing less than £20 each, that are attached, outside of the line of vision, to a pair of glasses that cost just £3. In this game, the subject used his or her eyes to move a bat to hit a ball that was bouncing around the screen – a feat that is difficult to accomplish with other read-out mechanisms such as brain waves (EEG). Its functionality was demonstrated by getting a group of people to play the computer game Pong without any kind of handset, as well as getting them to browse the web and write emails "hands-off". They say it could help people suffering from Multiple Sclerosis, Parkinson’s, muscular dystrophy, spinal cord injuries or amputees could soon interact with their computers and surroundings using just their eyes. The researchers have published their findings in IOP Publishing’s Journal of Neural Engineering. ![]() The GT3D device, which costs less than £40, was developed by researchers at Imperial College London and comprises an eye-tracking device and “smart” software.
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