[The velocity of the fast phase of nystagmus]

For the development of a computer program for nystagmus analysis the characteristics of the parameters duration, amplitude and velocity of the fast nystagmus phase were studied as well as their dependence on stimulus intensity. The results show that the duration is constant and not dependent on strength of stimulus. The amplitude was found to be approximately proportional to the velocity in the range of applied intensities but generally an exponential relation is suggested. Examples for evaluations of nystagmograms by means of a computer are shown. The analysis of these parameters is assumed to be of diagnostic importance.