Yes, in many cases, LASIK can fully remedy astigmatism, and the effect is irreversible.
Astigmatism is a really typical vision issue. Apart from having a rather scary-sounding name, astigmatism is not an eye disease – it’s simply a refractive error like near-sightedness or myopia and farsightedness or hyperopia – and also it can be corrected with eyeglasses, contact lenses and even LASIK surgical treatment.
Astigmatism generally is brought on by the front surface of the eye ( also called the cornea) having an uneven shape.
An analogy that’s commonly utilized to explain this is to state the cornea is formed like an American football (more like an ellipse) rather than like a baseball, which is completely round. Another is to say that an eye with astigmatism is formed like an egg or the back of a spoon, which are not evenly round, instead of like a ping-pong round ball.
The ultra-precise lasers that are now available in many eye clinics and are used for LASIK corrective surgery can be configured to reshape the cornea as well, so that the front surface area of the eye comes out more evenly shaped after the surgery, thus removing vision issues caused by corneal astigmatism.
When astigmatism is present, it usually does not go beyond 3.0 diopters (D) in magnitude and can be completely remedied with a single LASIK procedure.
Even larger amounts of astigmatism, if present can be corrected with LASIK, though this increases the possibility that a follow-up LASIK enhancement may be needed to fine-tune the improvement or in other words a second LASIK surgery might be needed.
If you have large amounts of astigmatism, this may influence your LASIK surgery expense, based on the surgery plans of the LASIK surgeon and/or clinic you select. If so, this will be talked about with you during your preoperative eye exam and investigation.