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What is Astigmatism and How Can LASIK Help?

Astigmatism is a common refractive error that occurs when the eye’s cornea or lens has an irregular shape. Under normal conditions, the cornea and lens are smooth and uniformly curved, like a ball, allowing light to focus properly on the retina at the back of the eye. However, when astigmatism is present, the cornea or lens is shaped more like a football or the back of a spoon, causing light to scatter and distort vision.

People with astigmatism often experience blurred or distorted vision at all distances. This condition can accompany other refractive errors such as myopia (nearsightedness) or hyperopia (farsightedness), but it can also occur independently.

Symptoms of Astigmatism:

  • Blurred or distorted vision
  • Eye strain or discomfort
  • Headaches
  • Difficulty seeing at night
  • Frequent changes in prescription glasses or contact lenses

Diagnosing Astigmatism: A comprehensive eye examination by an optometrist or ophthalmologist can diagnose astigmatism. The exam typically includes tests that measure how your eyes focus light and determine the curvature of your cornea.

How Can LASIK Help?

LASIK (Laser-Assisted In Situ Keratomileusis) is a popular and effective surgical option for treating astigmatism. The procedure reshapes the cornea to correct the irregular curvature, allowing light to focus properly on the retina and providing clearer vision. At Washington University, Dr. Wexler, a skilled LASIK surgeon, has performed over 70,000 LASIK surgeries, bringing extensive experience and expertise to the procedure.

Stephen A. Wexler, MD

Stephen A. Wexler, MD

Professor of Ophthalmology and Visual Sciences

 Medical Director Washington University LASIK Surgery Center

The LASIK Procedure:

  1. Preparation: Before the procedure, numbing eye drops are administered to ensure comfort. The surgeon places a lid holder to keep your eyes open and prevent blinking.
  2. Creating a Flap: A specialized laser or microkeratome creates a thin flap in the cornea. The surgeon gently lifts this flap to access the underlying corneal tissue.
  3. Reshaping the Cornea: Another laser, called an excimer laser, precisely removes tiny amounts of tissue from the cornea to reshape it. For astigmatism, the goal is to create a more uniform curvature.
  4. Repositioning the Flap: After reshaping the cornea, the surgeon repositions the flap, which naturally adheres without the need for stitches.

Benefits of LASIK for Astigmatism:

  • Improved Vision: LASIK can significantly improve vision, often reducing or eliminating the need for glasses or contact lenses.
  • Quick Recovery: Many patients experience improved vision within 24 hours of the procedure, with minimal discomfort.
  • Long-Term Results: LASIK offers lasting results for most individuals, providing a permanent solution for astigmatism.

While LASIK is an excellent option for many, it is not suitable for everyone. A thorough pre-operative evaluation is necessary to determine if you’re a good candidate for the procedure. Factors such as corneal thickness, overall eye health, and individual vision needs are taken into account.

Eric Polk, OD, FAAO

Eric Polk, OD, FAAO

Staff Optometrist, Ophthalmology and Visual Sciences

Dr. Eric Polk, a skilled optometrist at WashU, can help determine if you’re a good candidate for LASIK. Dr. Polk has extensive experience in evaluating patients for LASIK surgery and can provide a thorough pre-operative assessment. To learn more or to book a free consultation, click here.

Astigmatism is a common condition that can cause significant visual impairment, but with advancements in corrective surgery like LASIK, patients now have more options than ever to achieve clear vision. If you’re experiencing symptoms of astigmatism and are interested in learning more about LASIK, consider scheduling a consultation with an eye care professional to discuss your options.

For a visual explanation and to see LASIK in action, check out this insightful video: Watch Here. It provides a quick overview of how LASIK can help correct astigmatism and improve vision.