Prescription AnalysisPregunta 33 de 100
In the Rx -2.50 -0.75 x 180, what does the 180 represent?
a.The sphere power
b.The axis of the cylinder
c.The add power
d.The prism base
Explicación
The number after the 'x' is the cylinder axis, expressed 1 to 180 degrees, indicating the orientation of the cylinder correction. Here the axis is 180 degrees.
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