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Lasik

What is.. LASIK ?

 

Laser assisted in situ keratomileusis, or LASIK, is an outpatient surgical procedure that treats myopia (nearsightedness), hyperopia (farsightedness), and astigmatism. LASIK uses a microkeratome and a laser to reshape the cornea (the clear covering of the eye) to improve the way the eye focuses light rays on to the retina.
LASIK eliminates your dependence on glasses and contact lens. Most people who have this procedure are corrected to better than 20/40 vision with a majority of people achieving 20/20 vision or better.

Lasik At Thai Eye Center

WaveLight EX500 Excimer Laser

Precise, Fast, and Safe

We use the latest FDA approved WaveLight EX500 Excimer Laser which delivers the fastest laser vision correction procedures available. The EX500 is the next generation in Wavefront Optimized technology designed to increase efficiency and enhance patient comfort.

Built for Speed and Superb Outcomes
Featuring a 500 Hz repetition rate, the WaveLight EX500 Excimer Laser delivers the world’s fastest ablation times at only about 1.4 seconds per diopter, resulting in consistent outcomes. This innovative engineering helps reduce the potential for:
1. Stromal dehydration of the cornea
2. Flap shrinkage
3. Sensitivity to eye movements
4. Patient fixation fatigue

Built for Speed and Superb Outcomes
With a powerful 1050 Hz multi-dimensional eye tracker, the WaveLight EX500 Excimer Laser offers exceptional precision and safety:
1. Movement tracking with just 2 milliseconds of latency
2. Dynamic pupil tracking with active pupil centroid shift correction
3. NeuroTrack to compensate for cyclotorsion

Optimized Shot Distribution
Utilizing proprietary PerfectPulse Technology, the WaveLight EX500 Excimer Laser maintains a high pulse frequency with a minimized thermal load:
1. Only 1 pulse in 5 is allowed to overlap
2. Optimizes temporal and spatial shot distribution
3. Reduces the potential for nighttime glare and halos

Its proven state-of-the-art technology provides excellent results that is customized to every eye through Wavefront Optimized®, Wavefront-Guided, and Topography-Guided laser procedures. The EX500 provides the physician and patient with the utmost safety and reliability.

Bladeless Femtosecond Lasik

WaveLight FS200 Femtosecond Laser

The latest revolution in lasik surgery

Femtosecond Laser Lasik
Creating the flap is a standard step in LASIK. With traditional LASIK, your surgeon used a mechanical instrument containing a blade to create the flap. Now, laser vision correction features a second laser specially designed for faster and safer flap creations. This new laser gives your surgeon complete control for personalized treatments, precise and predictable procedures, and the most consistent results.

WaveLight® FS200 Femtosecond Laser   
The WaveLight® FS200 femtosecond laser helps doctors produce more reliable outcomes during refractive procedures. By combining optimal energy including low-pulse energy during sharp-cutting edging and spacing parameters through a highly precise scanning algorithm, the WaveLight® FS200 laser makes it possible for surgeons to create consistent, high-quality "flaps."

Advantages of Femtosecond Lasers in Lasik
1. Significant improvement in safety with minimized occurences of flap complications
2. Bladeless procedure
3. Precise and customizable flap perfectly tailored to each individual patient's procedure
4. Creates a smooth and fast healing flap allowing for a faster recovery
5. Creates a flap in just 6 seconds

Am I ... a good candidate for LASIK?

 

People who want to minimize their dependence on glasses or contact lenses make good candidates for LASIK. Lifestyle, hobbies, and amount of correction needed are all factors that may determine whether you are a good candidate.

The ideal candidate for LASIK should

  • be over 18 years of age
  • has a stable vision for at least one year. You should not have had a change in your prescription in the last year, and should have a refractive error within the range of correction for LASIK
  • not have Sjogren's Syndrome, Lupus or previous herpes of eyes
  • not have a present scarring on the cornea
  • not be nursing or pregnant on the date of surgery
  • not have pupils that dilate beyond seven millimeters in the dark

You must also be willing to accept the potential risks and side effects.

 

What happens before surgery?

Topography Measurement Machine

Your ophthalmologist will perform a thorough eye exam to measure your prescription and check for any abnormalities to determine if your eyes are healthy and suitable for the treatment.
If you wear contact lenses, you should stop wearing them at least 5-7 days before the actual treatment, depending on the type of contact lens that you are wearing. Your doctor will check your eyes for unusual dryness, which could cause dry eye symptoms post-operatively, or unusually large pupils, which could affect night or low-light vision.

How is LASIK done ?

Step 1

A flap is created in the upper layer of the eye and carefully folded back.

Step 2

Next, laserlight gently reshapes the cornea

Step 3

The flap is then put back into its original position, where it completely adheres.

Preparation

Your physician will conduct and extensive examination of your eye before the laser treatment in order to precisely determine its health, come al thickness and the degree of your visual defect. Once the examination is completed on the day of treatment, you will lie down on the laser bed. The physician will then apply eye drops to numb your eye..

After

You will already be able to see your surroundings with improved visual acuity, but for a few hours after the treatment your eye may itch or burn and you experience sensitivity to light. You should try to rest and avoid strenuous visual activities like reading or watching TV while your eye continues the healing process.

Treatment

In the first step of the procedure, the physician creates a thin flap in the upper layer of your cornea. During this time your sight will be briefly interrupted due to increased ocular pressure in your eye. Then the flap is carefully folded back to expose the lower corneal layer. At this point you will be able to see, but everything will be blurry.

For the next step, the physician will ask you to concentrate your sight on a green light. Then the actual laser treatment begins. Due to the high speed of the laser system, the average treatment will only take a few seconds.

Once the laser treatment is finished, the flap is returned to its original position where it completely adheres and works like a natural band-aid. Your eye will then receive antibiotic eye drops to prevent infections. The treatment is now fully completed.

 

What happens after surgery?

WaveLight Refractive Suite

A see-through shield protects the eye for the first night. It is normal for the eye to burn or feel scratchy. This usually disappears in a few hours. Plan on going home and taking a nap or just relaxing after the procedure. You will be given eyedrops to help heal and alleviate dryness. Healing after LASIK is usually less uncomfortable than with other methods of refractive surgery because the laser removes tissue from the inside of the cornea and not the more sensitive corneal surface.

The follow up exams during recovery are required to ensure that your eyes heal properly.
Do not rub your eyes. You may wear protective eye shields for the first 1-2 nights.
Don’t let the water directly getting in your eyes for the first 5-7 days. Use a face cloth and be careful not to rub your eyes
Wear sunglasses after surgery if you experience sensitivity to bright lights
Avoid eye makeup and smoky or dusty environments for a week.
Patients are able to return to work and other daily activities the day after the procedure. It is recommended that you go to sleep right after LASIK surgery to reduce post-operative pain. When you wake up, you should already notice improved vision.

Risks, Complications and Side Effects

Ieyesis Machine

LASIK has small risks and complications that should be carefully considered. There is small chance that LASIK can result in undercorrection or overcorrection. Most complications can be treated without any loss of vision. Many people experience some dryness in the eyes and fluctuating vision during the day. These symptoms usually fade within one month, although some people will continue to have symptoms for a longer period of time.