Virtual reality leaves you virtually reeling

 作者:柴卢     |      日期:2019-03-08 06:01:00
By Jeff Hecht in Boston JANNICK Rolland knew there was something wrong when she took off a virtual reality helmet and tried to drink a soda. She brought the can to the top of her head instead of her mouth, and a colleague had to stop her before she poured the soda all over herself. The experience got Rolland, of the University of Central Florida in Orlando, and her colleague Frank Biocca of Michigan State University, thinking about the side effects of immersive environments. In a series of experiments, the pair found that although users quickly adapt to working with virtual reality displays, it takes about half an hour for their hand-eye coordination to return to normal afterwards. The researchers found that users regularly misjudge the positions of real world targets after removing the displays. Such mistakes could be catastrophic for surgeons trying to perform operations with the assistance of virtual reality tools, they say. Virtual reality displays shift perspective, and therefore depth perception, because one of the cues our brains use to judge distance is the difference between the images each eye sees. However, the cameras—whether real or part of a computer program—that produce the images projected onto each side of a virtual reality headset are seldom the same distance apart as the viewer’s eyes. Rolland says that one way around the problem is to use simple image-splitting mirrors that overlay video or computer-generated images on the real world: “You see the real world as it is,