Ophthalmic Optics第 20 / 100 题
As the index of refraction of a lens material increases, for a given power the lens can be made which way?
a.Thinner
b.Thicker
c.Softer
d.More curved
解析
Higher-index materials bend light more efficiently, so less material and shallower curves are needed to achieve a given power, producing a thinner and often lighter lens.
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