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During normal vision, light passes through the cornea, the clear covering of the eye, and then through the pupil. Light then passes through the lens, which focuses the image on the retina at the back of the eye.

LASIK surgery is for people who are nearsighted, meaning that distant objects are blurry because the distant images are focused in front of the retina instead of on it.

During LASIK surgery, a laser and a cutting tool ... more