要回答这个问题,首先要讲明白什么是“花眼”。最浅显的比喻莫过于用照相机的功能来作解答。我们知道,照相机拍照时需要调节镜头的焦距,才能摄下清晰的画面,拍5米远的景物和拍1米远的景物所用的焦距是不同的,调节焦距的任务是由拍摄者来完成的。人的眼睛与照相机的成像原理基本是相同的。为了看清不同距离的物体,人眼同样需要不停地调节焦距,当然,人眼调节焦距是通过调节晶状体的凸 To answer this question, we must first understand what is “flamboyant.” The most obvious analogy than using the camera’s function to answer. We know that the camera needs to adjust the focal length of the lens in order to take a clear picture. The focal length of the scene at 5 meters and the scene at 1 meter are different. The task of adjusting the focus is done by the photographer . People’s eyes and camera imaging principle is basically the same. In order to see the different distances of objects, the human eye also need to constantly adjust the focal length, of course, the human eye to adjust the focal length by adjusting the lens convex