Prescription AnalysisCâu 46 / 100
An Rx reads OD +1.50 -0.50 x 090, OS +1.50 -0.50 x 090, Add +2.25. What is the near power in each eye?
a.+3.75 -0.50 x 090
b.+1.50 -0.50 x 090
c.+2.25 -0.50 x 090
d.+3.75 -2.75 x 090
Giải thích
Near sphere = distance sphere + add = +1.50 + 2.25 = +3.75. The cylinder and axis carry through unchanged. Near Rx: +3.75 -0.50 x 090 in each eye.
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