"If you're walking down the sidewalk and you're anticipating a corner, it's hard to beat a guide dog that knows you and can help you travel long distances," he said. Having access to a portfolio of complementary navigational tools is often ideal, according to Dave Power, the president and chief executive of Perkins School for the Blind, the nation's first school for the blind. A vibrating cane might help a user detect large obstacles ahead of them, for example, but it can also numb the delicate sensations that allow someone's fingertips to perceive subtle changes on the ground below, Albertorio said.īecause of the variety of navigational challenges visually impaired people face, there is no single solution for getting around, experts say. The challenge for engineers, Albertorio said, is creating technology that isn't obtrusive, distracting the user from the sensations and sounds visually impaired people rely upon. By clicking, Daniel Kish, who lost both eyes to cancer as a toddler, can even ride a bike on city streets. And at least one man, known as "the real life batman," trains visually impaired people to create a rudimentary form of echolocation by clicking his tongue against the roof of his mouth - a tactic he learned on his own.
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