"A computer as large as a speck of dust has been created, according to researchers at the University of Michigan. It's the prototype of a millimeter-sized computing system that can hold up to a week's worth of data and can be implanted in an area as small as the human eye.
It's been dubbed the Phoenix chip and is one cubic millimeter in size. It was originally designed to measure eye pressure in glaucoma patients. Within the computer is a low-power microprocessor, a pressure sensor, memory, a thin-film battery, a solar cell and wireless radio with an antenna to transmit data to an external reader device held near the eye.