当我们正常注视远近目标时,双眼均有不自主的细微运动,这种细微的不自主运动,肉眼一般不能察觉,需要利用特殊的仪器才能发现,这种细微的不自主运动是保证双眼黄斑部感受细胞不致疲劳,使更多的视细胞参与视觉活动的必要条件。双眼所以能稳定地注视一物,主要靠眼外肌神经肌肉的协调,也就是说,靠知觉系统及运动系统来完成:在知觉方面,藉视网膜、前庭系统以及颈部肌肉本体感受终器官的知觉刺激来完成;在运动系统方面,靠支配眼外肌的眼运动神经,控制肌肉张力的小脑,以利于各种反射反应 When we normally focus on the near and far targets, both eyes have involuntary subtle movements, this subtle involuntary movements, the naked eye generally can not be detected, the need to use special instruments to find that this subtle involuntary movement is to ensure the macular eyes Feel the cells do not fatigue, so that more cells as a necessary condition for participation in visual activities. So the eyes can stably look at a thing, mainly by the coordination of extraocular muscle neuromuscular, that is to say, by the perceptual system and exercise system to complete: In perception, the retina, vestibular system and the neck muscle end organ Perceptual stimulation to complete; in the exercise system, the eye motor nerves dominate the extraocular muscles, muscle tone control of the cerebellum, in order to facilitate a variety of reflex reactions