The in-built bio amplifier in the PowerLab 15T and 26T consists of an electrically isolated, AC-coupled, differential amplifier, whereas the Electrooculogram (EOG) is a DC signal. Therefore, to monitor eye movement accurately, especially to record the stationary intervals when the eyes are fixated on a point, the amplifier must be DC-coupled.
We recommend using an EOG Pod, a DC-coupled biopotential amplifier specifically designed for this application.
Note: This is only applicable to teaching systems. For EOG research, we recommend the research-grade Bio-Amp, which has a DC mode.
For further technical assistance with this or any other issue, please contact ADInstruments Technical Support by clicking HERE.