Eye implant helps blind patients 'read' Braille

A new device that allows blind patients to see words by stimulating the light-sensitive part of the eye has been developed by researchers.

Solar-powered chip, battery not required

Solar-powered microelectronics? Not unusual. 

But a solar-powered microchip with no battery - that is to say, a chip with the solar cell integrated into it and running directly off available light - now that's a breakthrough.