Lasik is begun by using a surgical tool or laser to create a thin circular flap in the cornea. Then a cool ultraviolet light beam is used to remove tissue and reshape the cornea. This improves vision by allowing the cornea to more accurately focus light on the retina. The incision in the cornea is allowed to heal naturally after the cornea reshaping. LASIK can also treat astigmatism by correcting irregularities in the cornea. After the surgery, topical anesthetic drops are used, and there is no post-operative bandaging or eye patch.
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