1.Jumping type: The eye is moving back and forth with different speeds obviously, when the eye slowly turns to plus one direction to a certain degree, and then suddenly returns with a sharp jumping movement. So this type of nystagmus has the performance of chronic and pleasant phase, chronic is the physiological phase, fast phase is the corrective movement of slow phase, fast phase direction as the direction of nystagmus, fast phase is related to the cause of the disease. 2, oscillation type: The oscillation of the eye is like a pendulum, there is no fast phase and slow phase. Its speed and amplitude are both equal. It is mostly seen in patients with binocular dark blindness and amblyopia.