Actor Ian McKellen is shown in a scene from the film "The Hobbit: An Unexpected Journey."
Reuters
3d

New 3-D movie technology: are viewers ready?

Eye up close
Getty Images/Flickr RF
cybernetics

Researchers crack retinal code to deliver artificial vision

Geordi LaForge
CBS via Getty Images
medical-devices

Vision-restoring goggles could help people avoid troublesome retina implants

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