Astigmatism can’t be “removed” the way you’d remove a splinter, but it can be fully corrected so you see clearly without blur or distortion. Your options range from glasses and specialty contact lenses to laser surgery that permanently reshapes the cornea. The right choice depends on how much astigmatism you have, whether it’s stable, and whether you want a temporary or permanent fix.
What Causes Astigmatism in the First Place
In a normal eye, the cornea (the clear front surface) is curved evenly like a basketball, focusing light to a single point on the retina. With astigmatism, the cornea is curved more like a football, steeper in one direction than the other. This means light doesn’t land on a single focal point. Instead, it creates two separate focal lines, producing blurry or stretched-out vision at all distances.
Most astigmatism is corneal, meaning the irregular shape is in the cornea itself. Less commonly, the lens inside the eye can be tilted, displaced, or unevenly curved, which produces lenticular astigmatism. A small number of people have both types at once. Knowing which kind you have matters because it affects which correction methods work best. Your eye doctor can distinguish between the two using corneal mapping technology that measures the shape of the front surface separately from the lens.
Glasses and Contact Lenses
The simplest correction is a pair of glasses with a cylindrical lens prescription. This compensates for the uneven curvature by bending light differently along the axis where your cornea is steepest. Glasses work for any amount of astigmatism and carry zero risk, but they obviously only correct your vision while you’re wearing them.
Contact lenses for astigmatism are called toric lenses. Unlike regular contacts, toric lenses have different focusing powers built into different zones of the lens, so they need to stay in a specific orientation on your eye to work properly. Most use a design called prism ballast, where the bottom of the lens is slightly thicker and heavier so gravity keeps it from rotating. Studies show prism-ballasted toric lenses stay stable on corneas with up to about 3.5 diopters of astigmatism. If your astigmatism is higher than that, or if soft toric lenses keep rotating on your eye, rigid gas-permeable lenses are an alternative. Their firm surface essentially overrides your cornea’s irregular shape, creating a smooth refracting surface with a tear film underneath.
Orthokeratology: Temporary Reshaping Overnight
Orthokeratology (ortho-K) uses firm, gas-permeable lenses worn only while you sleep. The lenses gently press the cornea into a more even shape overnight, giving you clear vision during the day without glasses or contacts. You can notice results after a single night of wear, though the best outcomes come with consistent nightly use over several weeks.
The catch is that ortho-K is not permanent. Your cornea gradually returns to its original shape if you stop wearing the lenses, so you need seven to eight hours of sleep in them every night to maintain the effect. Think of it as a middle ground: no daytime eyewear, but still a nightly routine. It works well for mild to moderate astigmatism and is popular with parents looking to slow prescription changes in children.
LASIK and SMILE: Permanent Laser Correction
Laser surgery is the closest thing to truly “removing” astigmatism. LASIK uses a laser to reshape the cornea by removing microscopic amounts of tissue, flattening the steeper areas so light focuses evenly. It’s effective, widely available, and has decades of outcome data behind it.
SMILE is a newer procedure that removes a small disc of tissue through a tiny incision, without creating the flap that LASIK requires. The FDA has approved SMILE for astigmatism up to 3.0 diopters. LASIK can treat similar or slightly higher levels. For astigmatism above 3.0 diopters, both procedures carry a higher chance of undercorrection, meaning you might still need thin glasses or a touch-up procedure afterward.
PRK is a third laser option, sometimes preferred for people with thinner corneas. It reshapes the surface directly without a flap or incision but has a longer, more uncomfortable recovery in the first week.
All three procedures share the same general recovery arc. You’ll typically notice sharper vision within a day or two, but according to the FDA, it can take three to six months for your vision to fully stabilize. During that window, mild fluctuations in clarity are normal, especially in the first few weeks.
Correction During Cataract Surgery
If you’re over 50 and developing cataracts, you have a built-in opportunity to correct astigmatism at the same time. During cataract surgery, the clouded natural lens is replaced with an artificial one. If you choose a toric intraocular lens (IOL), that replacement lens is designed to counteract your specific amount of astigmatism. Toric IOLs are available in cylindrical powers ranging from 1.5 to 6.0 diopters, covering mild through significant astigmatism.
Outcomes are strong. More than 78% of patients in clinical studies achieved 20/40 or better uncorrected distance vision, which is the threshold for driving without glasses. At six months, roughly 80% of patients had their remaining astigmatism reduced to 1.0 diopter or less.
Another option during cataract surgery is limbal relaxing incisions, where the surgeon makes small cuts at the edge of the cornea to allow it to settle into a rounder shape. These incisions reduce astigmatism by about 40% on average, though results vary. Studies show the target correction is often not fully reached, with reductions reported anywhere from 25% to 52% depending on the technique. Toric IOLs generally deliver more predictable results, but limbal relaxing incisions can be useful for lower amounts of astigmatism or as a supplement.
When Astigmatism Is Getting Worse: Keratoconus
Most astigmatism is stable and simply needs to be corrected. But if your astigmatism is increasing over time, especially during your teens or twenties, the cause may be keratoconus, a condition where the cornea progressively thins and bulges into a cone shape. Standard laser surgery is not safe for keratoconus because removing tissue from an already-thinning cornea can make it weaker.
The first-line treatment to stop keratoconus from progressing is corneal cross-linking. During the procedure, vitamin B2 drops are applied to the cornea and then activated with ultraviolet light, which strengthens the chemical bonds between collagen fibers in the corneal tissue. A seven-year follow-up study found that no treated eyes progressed after cross-linking, and both corrected and uncorrected vision continued to improve over the full follow-up period. Corneal steepness decreased by nearly 1.0 diopter at seven years compared to before treatment. Cross-linking doesn’t eliminate existing astigmatism, but it locks the cornea in place so the astigmatism stops getting worse, and in many cases the cornea actually flattens slightly over time.
After cross-linking stabilizes the cornea, rigid gas-permeable lenses or specialty scleral lenses can correct the remaining irregular astigmatism. Some patients eventually become candidates for additional procedures, but stabilization always comes first.
Do Eye Exercises Work?
Astigmatism is a physical shape issue in the cornea or lens. No amount of eye exercises, palming, or “vision therapy” will reshape the cornea’s curvature. A systematic review of all published evidence on eye exercises found no clear scientific support for their use in correcting refractive errors like astigmatism. The exercises that do have evidence behind them treat coordination problems between the two eyes, which is an entirely different issue. If you see a program claiming to cure astigmatism naturally, it’s not backed by science.
Choosing the Right Option
For mild astigmatism that doesn’t bother you much, glasses or toric contacts are the simplest path. If you want freedom from daytime eyewear but aren’t ready for surgery, ortho-K is worth discussing with your eye doctor. For a permanent fix, LASIK, SMILE, or PRK can reshape the cornea in minutes with a recovery period of a few months. And if cataract surgery is already on the horizon, a toric IOL lets you address both problems in a single procedure.
The amount of astigmatism you have plays a role in what’s realistic. Laser procedures work best for astigmatism up to about 3.0 diopters, with diminishing precision above that. Toric IOLs can handle up to 6.0 diopters. For very high or irregular astigmatism, rigid contact lenses often provide the sharpest vision of any option. Your eye doctor will measure not just the amount of astigmatism but its type, axis, and stability to narrow down which approaches will give you the clearest result.