London: Scientists have created what they claim is the world's smallest computer system that is just one square millimetre in size and can fit into one's eyeball.

Developed by a team at the University of Michigan, the unnamed tiny device is a pressure monitor that can be implanted in a person's eye to treat glaucoma.

It may be just one square millimetre in size but it packs a hefty punch, containing an ultra low-power microprocessor, a pressure sensor, memory and a thin film battery.

It also has a solar cell and a wireless radio with an antenna that can transmit data to an external reader device, the researchers said.

The device is already being touted as the future of the computing industry, although it needs several more years to be commercially available.