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範例:視力矯正[91預試卷]

人眼可以看清楚的物體與眼睛最接近的距離,稱為明視近點。正常人眼的明視近點約為25.0cm處,但此距離會隨著年齡增大而變得愈遠。李先生不戴眼鏡時,須將報紙置於眼前50.0cm處,方可清楚閱讀報紙上的文字。他需要配戴下列何種規格的眼鏡,才能和常人一樣閱讀報紙? [91大考中心]


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Posted in 光學儀器, 指考模擬試題, 指考預試卷.

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