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When a person decides to undergo vision correction to minimize or eliminate nearsightedness, farsightedness or astigmatism, it is to laser vision surgery that they look.
The procedure involves using a laser to reshape the cornea of the eye. Vision correction is needed when light entering the eye does not travel properly to the retina located at the back of the eye. Because of slight distortions in the cornea, the light skews so that the retina picks up blurred images. The person may see well up close, but not at a distance. This is called nearsightedness and is the one condition most easily corrected by laser surgery. Laser eye surgery is also successful in treating astigmatism, the condition of seeing images that are twisted. Farsightedness can be successfully treated in patients who are under 40. With older people who typically become farsighted as a result of aging, correction is often only partial.

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