This is called a horizontal gaze nystagmus test.

这是凝视水平震颤测试。

One common trio of multiple sclerosis symptoms is called Charcot's neurologic triad and it includes dysarthria, which is difficulty or unclear speech, nystagmus, which is involuntary rapid eye movements, and an intention tremor.

常见的MS三联征，Charcot神经三主征包括构音障碍（说话困难或不清）、眼球震颤（不自主的快速眼球运动）以及意向性震颤。