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    Virtual reality on the horizon for treatment of glaucoma


    The nGoggle consists of a head-mounted display for visual stimulus provided by a smartphone, and dry electrodes to provide a wireless electroencephalogram. It can output its results either to a tablet or via a Wifi gateway to the internet.

    If a person looks at a stimulus flickering at a given frequency, the brain will emulate that frequency, he explained. By displaying letters flickering at different frequencies, the researchers found they could use electroencephalography to determine which letter a subject was looking at, and in this way they could determine what the subject could see.

    Comparing this approach as a method of measuring visual field defects, the nGoggle was more accurate than standard perimetry, he said, citing a 2017 report in JAMA Ophthalmology.

    The device could be used to measure visual field loss, contrast sensitivity, spatial acuity and face recognition and the ability to carry out tasks in virtual reality, Dr. Medeiros said.

    It is objective, has the potential to be used at home, could be used frequently to detect change, and could screen for functional loss in remote locations, he said.

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