A low-cost, wearable, portable EOG recording system

This paper describes a new low-cost, wearable and portable system to acquire Electro-oculogram (EOG) signals. The system comprises of three electrodes for recording EOG, an instrumentation amplifier and signal conditioning unit, and a general purpose computer with a custom made EOG analysis software. A special type of signal acquisition arrangement has been made where the electrodes are embedded in a frame of a spectacle that provides adjustable settings for different head sizes. The electrodes comprise of dry Ag-AgCl sensors for acquiring the data. The software consists of preprocessing options such as sensor noise removal, power line noise removal, blink detection, saccade detection, etc. The system has been tested against a standard commercial Polysomnography system.