That could soon become a reality thanks to a group of researchers in the US.
The add-on gadget for smartphones could potentially help millions of people around the world.
Al Jazeera's Scott Heidler reports from Cambridge, Massachusetts.
That could soon become a reality thanks to a group of researchers in the US.
The add-on gadget for smartphones could potentially help millions of people around the world.
Al Jazeera's Scott Heidler reports from Cambridge, Massachusetts.
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