Ophthalmic OpticsQuestion 30 of 100
Cylinder power in a lens corrects for what refractive condition?
a.Presbyopia
b.Astigmatism
c.Simple myopia
d.Color blindness
Explanation
Cylinder power corrects astigmatism, in which the eye focuses light at different meridians unequally. The cylinder is oriented at a specified axis to counter the meridian needing correction.
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