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via WeWalk / Twitter

According to the World Health Organization there are about 250 million visually impaired people in the world and about 20% of them use a white cane to get around.

While a white cane can help people avoid obstacles at ground level they are left unprotected from objects from the chest up.

Smartphone technology has made it easier for visually impaired people to navigate streets and sidewalks, especially in unfamiliar areas, but it's tough to use a cane in one hand and smartphone in the other.

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