29 患者處方-3.00DS/-1.75DC×180,角膜散光為-1.00DC×180,配戴後此患者預期的殘餘散光為多少?
(A)-2.75DC×090
(B)-2.75DC×180
(C)-0.75DC×090
(D)-0.75DC×180
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統計: A(2), B(9), C(27), D(249), E(0) #1980635
統計: A(2), B(9), C(27), D(249), E(0) #1980635