It is usually assumed that motion perception is actively suppressed during saccadic eye movements. However, we present a new phenomenon which indicates that motion perception is not switched off during saccades. Subjects were required to do horizontal saccadic eye movements of various amplitudes. Observers reported intrasaccadic perception with a key-press. Saccades in the grating direction spread the temporal-frequency spectrum of the effective stimulus toward static channels.
Motion perception is optimal when the spread includes motion channels but leaves out static ones.