LASIK Laser Eye Surgery

Laser Eye Surgery Lasik Video, Part 1

Laser Eye Surgery Lasik Video, Part 2

What are the Benefits of LASIK?

LASIK is used to reduce nearsightedness and farsightedness. It is most successful for people who are mildly to moderately nearsighted, and it is also used to correct astigmatism. Farsightedness is more difficult to treat, and recovery time is longer. The procedure involves minimal operative and postoperative pain. Recovery is rapid and final results are usually achieved within three months. LASIK has fewer complications associated with it than other refractive eye surgeries.

How is the LASIK Procedure Performed?

Before the procedure, a sedative may be given. Anesthetic and antibacterial drops are also placed in the eye, and the doctor retracts the eyelids using titanium eyelid retractors. During the LASIK (laser in situ keratomileusis) procedure, the doctor uses a special machine called a microkeratome to cut the cornea so that there is a flap of cornea which is peeled back and held in place for the rest of the procedure. Suction is first applied to the eye ball during the first phase so that the cornea flattens, making it possible to cut the flap of cornea. Then, a computer-controlled excimer laser is used to shape the cornea as needed to correct vision. The doctor uses a mathematical calculation called the Munnerlyn formula to determine what the future eyesight will be. The flap is then placed back over the eye. The reshaping of the cornea changes how the eye refracts light, and therefore, changes vision. The entire procedure takes approximately ten minutes.

Is the LASIK Procedure Safe?

While there are no guarantees with an elective procedure, LASIK is considered safe if done by a skilled LASIK surgeon.

How Important is the Excimer Laser?

The laser uses pulses of ultraviolet light to remove microscopic amounts of the cornea. It is very important for the surgeon to be highly skilled with the laser and to be knowledgeable concerning factors that can alter the precision of the laser. Temperature, humidity, and altitude affect the precision of these lasers. It is also crucial that the surgeon does a pretest to verify that the laser is working properly.

What are the Risks Associated with LASIK?

During the LASIK procedure, suction is applied to the eye. This suction causes increased pressure, cutting off blood supply to the eye, and can therefore, cause permanent damage. However, there is not usually damaged because the suction is released as soon as the cornea is cut. LASIK can also cause the following problems:

• eye loss
• loss of cornea
• infection
• perforation
• deterioration
• undercorrection and overcorrection
• halos and glare
• displaced corneal flap
• vision regression

Can the LASIK Procedure be Repeated if Results Were not Optimal for the Patient?

Yes, enhancements can be done later. However, there is a greater risk for complications with subsequent operations.

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