What is the correct setting for EOG filters as per standard practice?

In the context of electrooculography (EOG), the setting of filters plays a crucial role in effectively capturing eye movements while minimizing noise from other physiological signals. The correct setting for EOG filters is typically understood as balancing sensitivity to eye movements with the need to attenuate high-frequency noise.

A filter setting of 0.3 Hz for the low cutoff (high-pass) effectively allows the detection of slow movements, such as those associated with blinks or slow eye movements, while eliminating very low-frequency artifacts. The high cutoff frequency of 35 Hz (low-pass) is appropriate for capturing the relevant frequency components of eye movements without including excessive high-frequency noise that could obscure the signal. This range appropriately captures the dynamics of normal eye movements which generally occur well below this range, thus ensuring clear and reliable EOG data.

Other filter settings may not effectively strike this balance — for example, settings with a low cut-off at 1.0 Hz may allow some unwanted low-frequency drift, whereas a high cut-off at 70 Hz or higher could introduce high-frequency noise that is irrelevant to the eye movement being analyzed. Thus, the 0.3/35 setting is standard practice for EOG filters, ensuring clarity in data concerning eye movements.