19 依照光學十字處方:90 度方向的屈光度+6.00 D,180 度方向的屈光度+3.50 D,其驗光處方為下列何者? (A)+9.50DS/+3.50DC×090 (B)+3.50DS/+2.50DC×180 (C)+6.00DS/+3.50DC×090 (D)+3.50DS/+1.50DC×180