Prescription AnalysisQuestion 41 of 100
Compensated (effective) power differs from the prescribed power mainly due to what?
a.Frame color
b.Lens tint
c.Vertex distance and lens tilt
d.Bridge size
Explanation
When a high-powered lens sits at a vertex distance or tilt different from where it was refracted, its effective power on the eye changes, so a compensated power is calculated to preserve the intended correction.
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