Ophthalmic Optics第 30 / 100 题
Cylinder power in a lens corrects for what refractive condition?
a.Presbyopia
b.Astigmatism
c.Simple myopia
d.Color blindness
解析
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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