I went blind for a day to try Microsoft's headset for the visually impaired

Microsoft is developing technology that allows blind pedestrians to know where they are using headphones and GPS. James Titcomb tests out the project's latest phase. It’s a cold, wet Tuesday morning in the middle of Reading town centre, and my world has gone pitch black. Somebody grabs my arm, to demonstrate how the walking stick I’m holding for the first time works, and I’m ordered to make it to the local shopping centre.

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