During LASIK surgery, a special type of cutting laser is used to precisely change the shape of the dome-shaped clear tissue at the front of your eye (cornea) to improve vision.
In eyes with normal vision, the cornea bends (refracts) light precisely onto the retina at the back of the eye. But with nearsightedness (myopia), farsightedness (hyperopia) or astigmatism, the light is bent incorrectly, resulting in blurred vision.
Glasses or contact lenses can correct vision, but reshaping the cornea itself also will provide the necessary refraction.
These usually clear up after a few weeks or months, and very few people consider them to be a long-term problem.
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