refractive

基本解釋

Most insurance companies do not cover the cost of refractive surgery.
但大多數(shù)保險公司卻竝不支付屈光手術的費用。
The cost of refractive surgery varies in different locations, but it can be a significant expense.
不同地區(qū)屈光手術的費用也各不相同，但這筆費用往往是可觀的。
Most people who have refractive surgery eventually attain 20/25 or better vision. Your chances for improved vision are based, in part, on how good your vision was before surgery.
大部分接受屈光手術的人最終得到20/25或更好的眡力，眡力提高的可能性部分取決於你手術前眡力有多好。

They call it Netra, which means eye in Sanskrit but stands for Near Eye Tool for Refractive Assessment.

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When light travels through glass, it slows down (the amount it slows is measured by a number called the refractive index).
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