Astigmatism is a common refractive error that causes blurred vision due to the irregular curvature of the cornea or lens. People with astigmatism often experience difficulty focusing on objects at various distances, leading to headaches, eye strain, and distorted vision.
For years, glasses and contact lenses have been the go-to solutions for correcting astigmatism, but LASIK eye surgery has emerged as a popular option for those seeking a permanent solution. The question is: does LASIK work for astigmatism? Let’s explore the science behind LASIK and how it helps individuals with astigmatism achieve clear vision.
Understanding Astigmatism
Before diving into how LASIK works for astigmatism, it’s important to understand the condition itself. Unlike nearsightedness (myopia) or farsightedness (hyperopia), astigmatism occurs when the cornea or lens is shaped more like a football than a basketball. This uneven curvature prevents light from being focused evenly on the retina, resulting in blurry or distorted vision.
People with astigmatism may also suffer from other refractive errors, such as myopia or hyperopia, which complicate the vision correction process. That’s where LASIK can be especially helpful, as it addresses multiple refractive issues in one procedure.
How LASIK Corrects Astigmatism
LASIK (Laser-Assisted In Situ Keratomileusis) is a refractive surgery that reshapes the cornea to correct refractive errors, including astigmatism. During the procedure, a highly precise laser is used to remove tiny amounts of corneal tissue to create a more regular curvature. This reshaping allows light entering the eye to be properly focused on the retina, resulting in clear vision.
Here’s how LASIK corrects astigmatism:
1. Pre-surgical Evaluation: Before surgery, your eye surgeon will perform a thorough eye exam to measure the shape and thickness of your cornea, as well as the severity of your astigmatism. This helps to determine whether you are a good candidate for LASIK.
2. Flap Creation: During the procedure, the surgeon creates a thin flap in the cornea using a laser. The flap is then gently lifted to expose the underlying corneal tissue.
3. Corneal Reshaping: A second laser, called an excimer laser, is used to reshape the cornea by removing microscopic amounts of tissue. For patients with astigmatism, the goal is to smooth out the irregularities in the corneal surface to create a more uniform, spherical shape.
4. Flap Repositioning: After the reshaping is complete, the corneal flap is placed back in its original position, where it naturally adheres without the need for stitches. The healing process begins immediately, and most patients notice improved vision within a day or two.
Success Rates of LASIK for Astigmatism
The good news is that LASIK has a high success rate for correcting astigmatism. Studies have shown that LASIK can correct up to 6 diopters of astigmatism, which covers the vast majority of cases. According to data from the American Refractive Surgery Council, “LASIK has an unprecedented 96 percent patient satisfaction rate – the highest of any elective procedure”. (Journal of Cataract & Refractive Surgery, Vol. 42, Issue 8, August 2016, Pages 1224-1234).
Even in cases of more severe astigmatism, patients typically experience significant improvements in their vision.
Is LASIK Right for You?
LASIK is an effective option for many people with astigmatism, but it’s not suitable for everyone. Factors such as the thickness of your cornea, the severity of your astigmatism, and any underlying eye conditions will play a role in determining whether you’re a good candidate for the procedure.
Here are a few things to consider:
1. Stable Prescription: Your eye prescription should be stable for at least a year before undergoing LASIK. Significant changes in your prescription could indicate that your eyes are still changing, which may impact the long-term success of the procedure.
2. Corneal Thickness: LASIK requires a certain amount of corneal tissue to be removed in order to reshape the cornea. People with very thin corneas may not have enough tissue for the procedure and may be better suited for alternative treatments.
3. Overall Eye Health: Conditions like dry eye syndrome, keratoconus (a progressive thinning of the cornea), or glaucoma may disqualify you from LASIK. A comprehensive eye exam will help determine whether you’re a good candidate.
What to Expect After LASIK for Astigmatism
If you’re wondering about LASIK recovery, most patients experience a rapid improvement in their vision, with many achieving 20/20 vision or better within 24 hours.
Your eye surgeon will provide detailed post-operative instructions, which typically include using prescribed eye drops, avoiding rubbing your eyes, and attending follow-up appointments to monitor your healing.
LASIK vs. Other Treatments for Astigmatism
While LASIK is the most popular laser eye surgery for astigmatism, it’s not the only option. Other treatments like PRK and EVO ICL (Implantable Collamer Lens) are also available and may be better suited for individuals with certain eye conditions or high levels of astigmatism.
PRK, for instance, involves reshaping the cornea without creating a flap, making it a good option for people with thin corneas. EVO ICL is a reversible procedure that involves implanting a corrective lens inside the eye without reshaping the cornea, making it an attractive choice for patients who are not ideal LASIK candidates.
So, does LASIK work for astigmatism? Absolutely. LASIK is a safe, effective, and proven method for correcting mild to moderate astigmatism, with the added benefit of addressing other refractive errors at the same time. If you’re tired of relying on glasses or contact lenses to see clearly, LASIK may be the long-term solution you’ve been searching for.
However, it’s important to consult with an experienced eye surgeon who can evaluate your unique situation and determine whether LASIK is the right option for you.
Schedule your Advanced Ocular Analysis with one of our eye doctors at Mueller Vision today!
