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'Seeing' through virtual touch is believing

Surprising results research could lead to new ways to help the visually impaired better navigate everyday life. A handheld torch uses infra-red sensors to "see" objects in front of it. When the torch detects an object, it emits a vibration -- similar to a cellphone alert -- through an attached wristband. The gentle buzz increases in intensity as the torch nears the object, letting the user make judgments about where to move based on a virtual touch.
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