Keratomileusis . Surgical correction of the refractive state of the cornea by lifting the front surface of the eye to form a thin, hinged layer under which the shape of the cornea is changed by means of the excimer laser or other surgical device.


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  • 1 Definition
  • 2 Importance
  • 3 Results
  • 4 Possible effects
  • 5 Complications
  • 6 Main risk factor
  • 7 Sources


Refractive surgery process in which, after removing a lamina from the cornea , it is remodeled to be implanted again.



The keratomileusis assisted laser situ, known as LASIK surgery is a procedure that modifies the tissue eye located on the front of the eye , called cornea. This surgery corrects vision problems such as nearsightedness , farsightedness, and astigmatism , reducing or eliminating the need for glasses or contact lenses .

LASIK operation

This procedure in removing the corneal tissue using a laser, in order to shape it. To access the cornea, the surgeon cuts a piece the size of a contact lens. After remodeling the cornea, the surgeon places the segment in place.

Vision often looks great after the operation, but it takes a few weeks for the end result to be evident. In some cases, the first surgery may not completely correct vision, being more common in people who have higher prescriptions.


Long-term positive results are usually more common in patients who have been previously diagnosed for the operation. A medical history, family history, and other existing medical conditions can influence the success of the surgery. The shape and thickness of the cornea should also be evaluated to ensure the procedure can be performed safely.

Possible effects

Possible side effects of the surgery can be flares and halos around the lights, especially at night, which can last from a few days to a few weeks.

Some people experience dry eyes after surgery, which can rarely become a chronic problem after the operation. People who have dry eyes before the procedure are more likely to contract this condition.


The most serious complication that can arise after surgery is post-LASIK ectasia, which changes the shape of the cornea after the procedure. People who suffer from this condition experience weakening of the cornea, but it is much more serious than that. In some cases, ectasia may require a corneal transplant.

Main risk factor

The main risk factor that can cause post-LASIK ectasia is keratoconus . Therefore, people with a family history of this disease are not suitable to undergo this operation.

Another eye problem that can affect vision after the procedure is a clouding of the lens , requiring cataract surgery .

In general, complications from this surgery are rare, especially patients are carefully screened and evaluated to confirm that they are good candidates for the procedure. Herein lies the importance of carrying out an evaluation before the intervention.

The vast majority of people have positive results and are satisfied with the result of the surgery.


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