Prescription Analysis第 49 / 100 题
Slab-off prism is used to correct what condition in a multifocal wearer?
a.Vertical imbalance at near between the two eyes
b.Horizontal PD error
c.Excess add power
d.A scratched segment
解析
Slab-off grinds prism into one lens to compensate for the vertical prism imbalance created at the reading level when the two eyes have unequal Rx (anisometropia), restoring comfortable near fusion.
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