Since the system dynamics are slow, the effect of these ICs does not die away quickly in a given
segment. Worse, the duration of the slow segments is usually much shorter than the time constants of the slow phase system. So if the ICs are ignored in an analysis, estimation of the VOR dynamics is biased [1], [2]. Moreover, misclassification of the nystagmus segments also results in biased identification of slow (or fast) dynamics.