ScienceDaily (May 28, 2012) — People with moderate visual impairment, particularly those who have difficulty perceiving the full extent of their surroundings, could use the ingenious device that these UC3M scientists have created. "This device is aimed at people who would bump into everything that they fail to see because of their loss of visual field, caused by glaucoma, retinal pathologies, etc.," states the head of the project Professor Ricardo Vergaz, of UC3M's Electronics Technology Department.The prototype was developed using an HMD device (Head Mounted Display), a virtual reality helmet that includes two cameras to which a small computer has been attached; the computer processes all of the images that it receives. Then, thanks to an algorithm that the researchers have developed, the system determines the distance and outline of the objects and communicates the information to the user in real time using two micro screens, highlighting the silhouette of the elements in the scene and varying the colors according to their distance.
"It detects objects and people who move within the visual field that a person with no visual pathologies would have. Very often the patient does not detect them due to problems of contrast," explains Professor Vergaz. "The information regarding depth is what is most missed by patients who use this type of technical aid," he adds.
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