Modeling and Analysis of Electrodes for Electrooculography

Selection of suitable electrodes for practical applications in electrooculography (EOG) is an open research problem. The present paper compares electrodes made of various materials (Copper, gold, silver and Ag-Ag-Cl) in terms of SNR, shape and surface area and employs statistical analysis to address the issue of choice of electrodes. A low-cost dry electrode assembly for EOG has also been proposed. The preliminary findings suggest that the proposed set of electrodes improve the quality of EOG recordings and are thus suitable for a wide range of EOG studies and BCI applications. Besides, the design of the electrodes has been tested on a number of subjects and found to ensure a more comfortable fit compared to the conventional electrodes and may hence be suitable for use over a long period of time.