Objective detection of the flicker fusion threshold with pupil diameter and visual evoked magnetic field

Abstract

Objective detection of a flicker fusion threshold was investigated by examining the differences in responses of pupil diameter and the visual evoked magnetic field (VEF) for flickering visual stimulation with a frequency over or under the flicker fusion threshold. The pupil diameter increment was larger and the decrement was smaller in frequencies over 7.5 Hz. The amplitude of OFF responses increased with an increase in the frequency of flickering. Differences in pupil diameter and OFF responses for VEF demonstrated the frequency of the flicker fusion threshold in a non-arbitrary way. © Springer-Verlag 2010.