测量视力时利用平面镜成像特点可以节省空间.如图1所示让被测者面对着镜子背对视力表此人看到视力表的像离他的距离是5m5m如图2所示是在 Template




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tomski测量视力时利用平面镜成像特点可以节省空间.如图1所示让被测者面对着镜子背对视力表此人看到视力表的像离他的距离是5m5m如图2所示是在 coloring