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朱晓林老师和饶华光老师提出了关于观察效果问题,笔者想借此机会作些观察细节的补充说明。瞳孔的调节是需要一个过程。因此,当观察瞳孔缩小与扩大的过程时,当镜子近移到与眼一定距离(根据各人视力而定,以至能看清自己的瞳孔物象为限,约十厘米左右)时,必须停止移动,两眼注视自己的瞳孔物象几秒钟,看清已经缩小的瞳孔以后,再把镜子缓慢移到一定的距离(同样以能看
Teachers Zhu Xiaolin and Rao Huaguang raised questions about the effect of observations. I would like to take this opportunity to give some supplementary explanations to observe the details. Pupil adjustment requires a process. Therefore, when observing the process of diminution and enlargement of the pupil, when the mirror is moved close to a certain distance from the eye (according to each person’s eyesight, and the pupil’s image can be seen clearly, about ten centimeters or so), the movement must be stopped. He looked at his pupil for a few seconds. After seeing the narrowed pupil, he slowly moved the mirror to a certain distance.