This mini computer has been designed for pressure measurement and being implanted in eye of patients suffering from glaucoma.

The computer is equipped with a pressure sensor, a lithium battery, a 4086-bit memory, a solar cell of 400 millivolts, a radio antenna (wireless) and a small 100 kilohertz processor.

For having extremely low power consumption, the processor has been built on 180-nanometer technology and not currently 32-nanometer one, in which case would need a bigger battery.

To conserve energy, the processor goes almost entirely in standby and is reactivated every 15 minutes to check the pressure. When is active, it consumes up to 5.3 nanowatts, monitoring almost in real-time the patient's eye pressure.

Battery, measuring only 0.07 square millimeters, can be loaded through the photovoltaic cells outside in about 1.5 hours of sunlight exposure and inside in 10 hours. The biggest challenge was to reduce the power consumption of each component, not the size.

Once a few days, with an external device, a doctor can download data from this small computer by wireless. The range of transmission is reduced up to 10 inches, all for conserving energy. However, such a distance is more than enough to retrieve data.

Scientists already are thinking how limitless are the situations in which could be assembled those mini computers.