Astigmatic keratotomy eye surgery -- or AK -- and the more commonly performed limbal relaxing incision, or LRI, surgery are safe and effective. In recent years, AK, has been largely replaced by LASIK.
The cornea of people who have astigmatism is shaped like a football. Astigmatic keratotomy eye surgery corrects astigmatism by making one or two incisions at the steepest part of the cornea. These incisions cause the cornea to relax and take a more rounded shape, thereby reducing astigmatism.
People usually complain of blurred vision, or children may not pass their vision exam at school before they’re diagnosed with astigmatism.
The doctor may use one or more of these four tests to diagnose astigmatism and measure its severity:
Vision test. Using a standardized chart, patients read the letters they can see from 20 feet away. If your vision is 20/20, you can see at 20 feet what a normal eye can see from 20 feet. If your vision is 20/80, you can only see at 20 feet what a normal...
People with mild eyeglass or contact lens prescriptions generally have the most success in obtaining normal vision after astigmatic keratotomy eye surgery. People with more severe astigmatisms may still require glasses or contact lenses after astigmatic keratotomy eye surgery.
What Are the Advantages of Limbal Relaxing Incision Eye Surgery?
Limbal relaxing incision eye surgery is a safe and effective way to correct astigmatism and it's often used in conjunction with other vision correction procedures.
What Are the Disadvantages of Limbal Relaxing Incision Eye Surgery?
There are disadvantages of limbal relaxing incisions. They include:
Discomfort (usually mild and lasting 1 to 2 days).
Results, both good and bad, are permanent.
What Are the Potential Side Effects of Limbal Relaxing Incision Eye Surgery?
Although rare, side effects from limbal relaxing incision eye surgery can occur. They may include:
Fluctuating vision, especially during the first few months after surgery
A weakened cornea, more vulnerable to rupture if hit directly
How Should I Prepare for Limbal Relazing Incision?
Before deciding on LRI, your medical history will be evaluated, and your eyes will be tested. Likely tests include measuring corneal thickness, refraction, corneal mapping, eye pressure, and pupil dilation. Once you have gone through your evaluation, your surgeon will tell you what to expect before, during, and after surgery and answer any questions you may have. Afterwards, you can schedule an appointment for astigmatic keratotomy.
If you wear rigid gas permeable contact lenses, you should not wear them during the three weeks before your evaluation. Other types of contact lenses shouldn't be worn for at least three days prior to the evaluation.
On the day of your eye surgery, eat a light meal before going to the doctor's office, and take all of your prescribed medications. Do not wear eye makeup or have any bulky accessories in your hair that will interfere with positioning your head under the laser. If you do not feel well that morning, call the doctor's office to determine whether the surgery needs to be postponed.