I recently had a client who had ageotropic nystagmus in the head right position that did not fatigue at 3 minutes. It did abate with fixation, but returned when the fixation light was turned off. After about 20 seconds of vibration, the ageotropic nystagmus abated. Upon rolling to her left side she had geotropic nystagmus. Following 2 360 degree rolls, she no longer had nystagmus in either of the positions. We finished with one more 270 roll.