LASIK eye surgery changes the shape of your cornea—the transparent membrane that arcs over your pupil and the colored part of your eye (iris).
LASIK 眼科手术改变了你的角膜的形状——角膜是覆盖在你的瞳孔和你的眼睛的有色部分（虹膜）上的弧形透明膜。
He engirded him, watched over him, Guarded him as the pupil of his eye.
他就环绕他，看顾他，保护他，如同保护眼中的瞳人。
The pupil of the eye dilates and contracts in response to light.
作为对光线作出的反应，眼睛的瞳孔会放大或缩小。
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