我们的视觉完善到何种程度? 夏天,请您到草地上去看看鹳鸟吧!看看它们在多么认真地用脚爪擦着自己的嘴巴.阳光照射在鹳鸟的身上,又从它身上反射到您的眼睛里.在这里,光线通过水晶体(晶状体),在视网膜上造成一个缩小了的、倒立的鸟像.集中在这个映像里的光能使视网膜上的一些特殊细胞受到刺激.兴奋沿着神经纤维传达到大脑皮质;复杂的反射联系在那儿接通了,这样您就看见了鹳鸟.整个过程还不到一秒钟.由于两只眼睛的协同动作,您可以知觉到鸟的大小,估计到到它那儿的距离.晶状体自动改变它的弯曲度的能力,使得您可以清晰地看见近 To what extent are our visual perfection? In the summer, please go to the meadow and look at the storks! Look how seriously they rub their beaks with their claws. The sun shines on the stork and reflects on it Into your eyes, where light passes through the crystal (lens), causing a reduced, inverted bird on the retina. The light concentrated in this image stimulates some of the special cells in the retina. The nerve fiber is transmitted to the cerebral cortex; the complex reflexes are connected there, so you see the stork and the whole process takes less than a second. As a result of the synergy of the two eyes, you can perceive the size of the bird , To estimate the distance to it.The ability of the lens to automatically change its curvature so that you can clearly see the near