Astigmatism can lead people to rule out LASIK before they even set foot in their eye doctor’s office for an evaluation, and it shouldn’t.
Astigmatism is common among people considering LASIK, and having it does not automatically make someone ineligible for laser vision correction. Candidacy depends on factors such as the amount of astigmatism, the overall health of the eyes, and what is causing the irregularity in the cornea.
Keep reading to learn more about LASIK with astigmatism.
Yes, LASIK Can Correct Astigmatism
LASIK works by reshaping the cornea so light focuses correctly on the retina.
In an eye with astigmatism, the cornea curves more steeply in one direction than another, closer to the surface of a football than a basketball. During surgery, the laser removes microscopic amounts of tissue in a precise pattern calculated from your own measurements, evening out the mismatch between the two curves. In nearsighted astigmatism, that means flattening the steeper curve. In farsighted astigmatism, the flatter curve gets steepened instead. Light rays that used to scatter across multiple focal points then converge properly, and the blur or distortion clears up.
The same applies whether astigmatism shows up on its own or alongside nearsightedness or farsightedness, which is often the case. Astigmatism sits near the top of the list of conditions LASIK can treat.
What Astigmatism Actually Does to Your Vision
Astigmatism blurs vision at every distance, not just up close or far away, which separates it from simple nearsightedness or farsightedness. Objects can look stretched, doubled, or hazy no matter how much you squint. Headaches and eye strain often come along with it, especially after reading or screen time, because your eyes work harder to compensate for the irregular shape. Most astigmatism is present from birth and stays fairly stable, though it can shift with age or with certain corneal conditions.
Where Astigmatism Gets Complicated
Mild to moderate astigmatism responds well to standard LASIK. Higher degrees of astigmatism change the calculation, as does astigmatism caused by an irregular condition like keratoconus rather than a simple mismatched curve. Corneal thickness matters here too, since LASIK requires enough tissue to reshape safely without weakening the eye’s structure.
A thorough LASIK safety evaluation looks closely at corneal mapping and thickness before anyone is cleared for surgery, and the purpose is to match the right procedure to the right cornea rather than to disqualify people.
Other Options If LASIK Isn’t the Right Match
When LASIK isn’t the ideal fit, vision correction is still very much on the table.
Several vision correction procedures exist for exactly this reason. PRK treats the corneal surface differently and often works better for thinner corneas. Patients who aren’t corneal candidates at all sometimes turn to EVO ICL, which places a lens inside the eye and corrects astigmatism without removing corneal tissue.
- LASIK reshapes the cornea directly and suits mild to moderate astigmatism with adequate corneal thickness
- PRK treats the corneal surface and is often the better choice for thinner corneas
- EVO ICL implants a lens inside the eye when corneal-based procedures aren’t a good fit
Cataract patients with astigmatism have their own solution. Toric lenses correct astigmatism at the same time cataracts are removed, addressing both conditions in a single procedure.
How to Know for Sure
Only a proper evaluation can tell you which category you fall into. Corneal topography maps the exact shape and steepness of your cornea, while pachymetry measures how thick it is. Together, those results show your surgeon whether standard LASIK is the right call, whether PRK makes more sense, or whether a lens-based option fits your eyes better.
Astigmatism on its own rarely rules anyone out. It simply means your evaluation carries a little more detail.
Curious whether your astigmatism qualifies you for LASIK? Schedule a LASIK evaluation at Fichte, Endl & Elmer Eyecare in Buffalo, NY, or call us at 1-800-309-2020 today.
