Eye movement controlled portable human computer interface for the disabled

This paper aims at the analysis and design of an interface to control the Mouse Pointer of a PC using the eye movements of the user. The potential difference between cornea and retina is measured and the movements of eyes were detected. The horizontal and vertical eye movement signals were recorded by the five electrodes placed on various locations surrounding the eye and were processed by horizontal and vertical channel amplifiers which consist of bio-potential amplifiers, band-pass filters and dc level shift circuits. Based on the kind of signal, an appropriate data is sent from the microcontroller to the PC serially. Mouse pointer movement in the PC is achieved based on the data received via serial port.