How Lasik Works

The real basic description of lasik eye surgery, and understanding how lasik works is that a laser is reshaping the cornea of the eye, and it resets the focal point of the eye straight to the retina, just like a normal eye.

Laser eye surgery works by pulsing a tightly-focused beam of light onto the surface of the eye. Upon contact with the surface of the cornea, the laser vaporizes a microscopic portion of the cornea. By controlling the size, position and number of laser pulses, the surgeon can precisely control how much of the cornea is removed.

LASIK combines the best features of ALK and PRK (see above). Like ALK, LASIK uses a microkeratome to create a "flap" of the outer corneal tissue that can be folded out of the way and then replaced. Once the flap is folded out of the way, LASIK uses the same Excimer laser used in PRK to reshape the underlying corneal tissue. Then the flap is replaced over the reshaped area and conforms to the new shape.

The great thing about the cornea is how quickly it heals. As soon as that flap is replaced, it begins to naturally seal itself to the rest of the cornea. This approach greatly speeds the overall healing process when compared to PRK, which leaves the reshaped area open.

Once your eyes are prepped for the surgery, by keeping them from closing. A shield will placed over one of your eyes, the laser will be calibrated for each of your eyes. The eye doctor will then make two small marks on the cornea to keep the cornea flap aligned.

The corneal flap is created using a device called a microkeratome. The doctor then uses a small suction ring to hold the eye steady and will quickly cut with the microkeratome. The microkeratome fits onto the suction ring and slices through the top part of the cornea to create a small flap that could be folded out of the way and then put back in place after the laser was done.

During the surgery the doctor will ask you to focus on a light, usually red or orange, this keeps your eye focused, with a less chance that your eye moves.

Once you are focused on the blinking light, the laser will be activated. The laser will usually only pulsate for 15 to 20 seconds, it will seem much longer when you are lying on the table, but it is over very fast. Once the laser has completed it's tasks, the cornea flap will be replaced, a small amount of antibiotic will be applied, and the cool thing about the cornea is that it heals remarkably fast.

Once the doctor is done with the first eye, the same procedure will be done to the other eye, and you are all done with the actual procedure.

Moving on answering how lasik works, we will discuss what happens immediately after the lasik eye surgery.

Once the lasik eye surgery is complete, you will most likely be taken to a post op room. What is really amazing is that you will notice while you are being escorted to the post op room is that you can already see SO much better than you could before you laid on the table.

Once in the post op room, the doctor will place a series of drops in your eyes, these drops are:

• Rewetting drops - like the ones used by people who wear contacts to keep the eyes from drying out


• Antibiotic drops - that reduce the chance of infection


• Moisturizing gel - that is placed on the inside of your bottom eyelid just before you go to bed. It provides moisture through the night like the rewetting drops do during the day.
  
  

You will also be given some kind of covering for your eyes, this can be a type of goggles, or glasses that cover the entire eye, and have small holes to allow you to see enough to get around. You will most likely be required to wear these for 24 hours, and for two week while you sleep. These are very important to keep things our of your eyes, including your fingers, and will also keep your eyes moist, which is very important for the recovery from your lasik eye surgery.

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