18 兩個薄透鏡+1.50DS/-0.50DC×080 和+2.00DS/-1.00DC×170 緊密相疊加的屈光度數,下列何者正確?
(A)+2.50DS/+0.50DC×080
(B)+3.00DS/-0.50DC×080
(C)+3.50DS/-0.50DC×170
(D)+3.50DS/-1.00DC×170
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統計: A(241), B(33), C(30), D(13), E(0) #2977877
統計: A(241), B(33), C(30), D(13), E(0) #2977877