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The contact lens that sees double

13 April 2012 Last updated at 00:43 BST

The human eye can only focus on one distance at once, which makes it hard for people to read a heads-up display while looking at the real world.

Glasses with built-in screens allow users to see displays directly in front of them, but the field of vision is narrow.

But now a company has developed a contact lens that promises a much wider field of vision.

Click's LJ Rich explains.

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