Can You Get LASIK With Astigmatism?
Understanding Astigmatism and How It Affects Your Vision
Astigmatism is one of the most common refractive errors, yet many patients are unsure exactly what it means or how it differs from nearsightedness or farsightedness. Understanding your condition is the first step toward making a confident decision about vision correction.
Astigmatism occurs when your cornea (the clear front surface of your eye) or your natural lens has an uneven curvature. Instead of being round like a basketball, the cornea curves more like a football, with one side steeper than the other. This irregular shape prevents light from focusing cleanly on your retina, causing blurred or distorted vision at all distances.
People with astigmatism often experience blurry or fuzzy vision, eyestrain, and difficulty seeing clearly at night. Headaches after reading or using a screen for long periods are also common, as your eyes work harder to compensate for the uneven focus.
- Squinting to see clearly at any distance
- Distorted or wavy appearance to lines and edges
- Difficulty distinguishing between similar letters or numbers
- Eye fatigue during reading or close-up tasks
Regular astigmatism is the most common form. The steepest and flattest curves of the cornea fall directly opposite each other in a predictable pattern, typically separated by 90 degrees. This type responds very well to LASIK correction.
Irregular astigmatism has an unpredictable pattern of curvature, often resulting from eye injury, corneal scarring, or conditions like keratoconus (a progressive thinning of the cornea). Irregular astigmatism usually requires a different treatment approach and careful evaluation before any refractive surgery is considered.
How LASIK Corrects Astigmatism
LASIK addresses astigmatism by precisely reshaping the cornea so that light can focus properly on the retina. The technology behind modern LASIK has made treating astigmatism more predictable and accurate than ever before.
During LASIK, an excimer laser removes tiny amounts of corneal tissue in a carefully programmed pattern. For astigmatism, the laser targets the steeper areas of the cornea, flattening them to match the rest of the surface. The result is a more evenly curved cornea that allows light to focus into a single, clear point on the retina.
Our LASIK Surgeons use wavefront-guided and topography-guided laser platforms that go far beyond correcting a standard glasses prescription. Optical wavefront aberrometry measures how light travels through your entire eye, while corneal topography maps thousands of individual points across your corneal surface. Together, these tools allow us to plan a treatment that is uniquely tailored to your eye.
- Wavefront-guided LASIK addresses subtle optical imperfections throughout the eye
- Topography-guided LASIK uses your corneal map to correct surface irregularities
- Custom treatments often produce sharper results than glasses or contacts alone
On the day of surgery, numbing drops are applied so you feel no pain. A femtosecond laser creates a thin protective flap in the surface of your cornea, which is gently folded back to expose the tissue underneath. The excimer laser then reshapes your cornea according to your personalized treatment plan, and the flap is repositioned. It adheres naturally without stitches.
The laser portion of the procedure takes less than a minute per eye. The full process, including preparation, typically takes about 15 minutes for both eyes. Most patients are surprised by how comfortable and straightforward the experience is.
Who Is a Good Candidate for LASIK With Astigmatism?
Not every person with astigmatism will be the right fit for LASIK, and that is why a thorough evaluation matters so much. Our LASIK Surgeons review a wide range of factors before making any recommendation.
LASIK can typically correct astigmatism up to approximately 6 diopters (a unit used to measure refractive error), though the exact treatable range depends on your individual anatomy. Lower to moderate levels of astigmatism generally respond very well. Higher degrees may still be addressable, but require careful review of your corneal measurements before proceeding.
Adequate corneal thickness is essential for LASIK to be performed safely. During your evaluation, pachymetry (a painless test that measures corneal thickness at multiple points) and corneal topography are used together to confirm that enough tissue exists to allow safe reshaping. If your corneas are too thin, a different procedure will be recommended.
Your prescription should be stable for at least one to two years before LASIK is performed. A prescription that is still changing suggests your eyes have not fully settled, which can make outcomes less predictable. Most patients are candidates by their mid-20s, though each case is evaluated individually.
Certain health conditions can affect your suitability for LASIK. Uncontrolled diabetes, autoimmune conditions, and some medications can influence healing. Eye-specific factors such as severe dry eye, active eye infections, or a history of specific corneal diseases also play an important role in determining candidacy.
- Severe dry eye should be treated and stabilized before surgery is considered
- Active eye infections must fully resolve prior to any procedure
- Pregnancy and nursing can temporarily affect your prescription stability
- Previous eye surgeries may influence the treatment approach we use
Patients with keratoconus, a condition in which the cornea progressively thins and changes shape, require special attention before refractive surgery. Our team has the ability to stabilize keratoconus through corneal cross-linking (CXL), a procedure that strengthens corneal tissue and halts progression, before evaluating whether refractive surgery is appropriate. LASIK Surgeon Dr. Elliot Perlman was the first in Rhode Island to offer FDA-approved corneal cross-linking, and this capability remains part of our integrated approach to complex corneal cases.
Our LASIK Surgeons and Technology
The experience and tools behind your LASIK procedure matter as much as the procedure itself. Our refractive surgery team brings decades of specialized training and advanced technology to every evaluation and surgery.
LASIK Surgeon Dr. Elliot Perlman completed fellowship training at Baylor College of Medicine and the University of Texas, and has been performing refractive surgery since 1994, accumulating more than 20 years of experience in laser vision correction. LASIK Surgeon Dr. Christopher Newton completed a fellowship in external disease and refractive surgery and brings additional expertise in corneal and refractive outcomes. LASIK Surgeon Dr. Jane Cook trained at Bascom Palmer Eye Institute, one of the most respected programs in ophthalmology, and contributes to the refractive care our patients receive.
We use excimer and femtosecond laser platforms for precise, reproducible results. Our diagnostic suite includes optical wavefront aberrometry and corneal topography systems that produce the detailed measurements needed for custom treatment planning. These tools allow our LASIK Surgeons to address not only standard astigmatism but also more complex corneal irregularities.
Our team is also equipped to evaluate and manage complications that can arise after refractive surgery performed elsewhere. If you have had LASIK or PRK at another practice and are experiencing concerns about your vision or corneal health, our LASIK Surgeons can perform a thorough assessment and discuss your options.
What to Expect From Recovery After LASIK
Recovery after LASIK is typically faster than most patients expect, though it is important to follow all aftercare instructions closely to protect your results. Knowing what to expect helps you plan and heal well.
Immediately after LASIK, your vision may appear hazy or blurry, and your eyes may feel gritty or sensitive to light. These sensations are a normal part of early healing and generally improve significantly within the first several hours. Resting your eyes after returning home is one of the most important things you can do on surgery day.
- Use all prescribed eye drops as directed to reduce inflammation and prevent infection
- Wear protective eye shields while sleeping during the first several nights
- Avoid rubbing your eyes to protect the healing corneal flap
Most patients notice a meaningful improvement in vision within the first day after LASIK and can return to work and routine activities within one to two days. Full stabilization of your vision typically takes three to six months, as the cornea continues to heal and settle during that period.
To protect your healing eyes, certain activities need to be limited for a period of time following surgery. Following these guidelines helps reduce risk and support the best possible visual outcome.
- Avoid swimming, hot tubs, and water sports for at least two weeks
- Skip eye makeup for approximately one week after surgery
- Refrain from contact sports for at least one month
- Limit screen time during the first day or two if it causes discomfort
- Stay away from dusty or dirty environments during early healing
We schedule follow-up visits at regular intervals after surgery to monitor your healing and confirm your vision is progressing as expected. Your first check is typically the day after surgery, with additional appointments at one week, one month, three months, and six months. These visits give us the opportunity to address any questions and make adjustments to your care if needed.
Temporary side effects such as dry eyes, light sensitivity, glare, and halos around lights are common in the weeks after LASIK and tend to improve as healing continues. Less common complications include infection, undercorrection, overcorrection, or issues with the corneal flap. Serious complications are rare when candidates are carefully screened and surgery is performed using modern techniques. Enhancement procedures can address residual refractive error after full healing has occurred.
Alternatives to LASIK for Astigmatism
LASIK is an excellent option for many patients, but it is not the only one. When LASIK is not the right fit, our LASIK Surgeons discuss the full range of alternatives so you can choose the path that is best for your vision and your lifestyle.
Photorefractive keratectomy (PRK) corrects astigmatism using the same excimer laser as LASIK, but without creating a corneal flap. Instead, the surface layer of the cornea is gently removed before the laser treatment is applied. PRK is a strong option for patients whose corneas are too thin for LASIK, and it produces final visual results that are comparable. Recovery takes longer because the surface cells need to regenerate, but the procedure is equally effective for treating regular astigmatism.
Refractive lens exchange (RLE) involves replacing your natural crystalline lens with an artificial intraocular lens (IOL) designed to correct your refractive error, including astigmatism. This procedure is very similar to cataract surgery and may be recommended for patients who have other factors that make corneal procedures unsuitable, or for those approaching the age at which cataracts commonly develop. Toric IOLs are specifically designed to address astigmatism as part of this procedure.
Limbal relaxing incisions (LRIs) are small, carefully placed incisions at the edge of the cornea that gently reshape it to reduce astigmatism. This technique is often used in combination with cataract surgery or lens procedures to fine-tune astigmatism correction alongside treatment for other vision conditions.
Surgical correction is not appropriate for every patient, and for some people, glasses or contact lenses continue to be the safest and most suitable solution. This is especially true for patients with very thin corneas, unstable prescriptions, or progressive corneal conditions that are still being managed.
- Corneas that are too thin for any laser procedure
- Prescriptions that continue to change year to year
- Active or uncontrolled corneal disease
- Medical conditions that significantly increase surgical risk
- Personal preference for non-surgical correction
Frequently Asked Questions
These answers are meant to address the practical questions patients often have when deciding whether to move forward with an evaluation or a procedure.
For most patients, the correction achieved through LASIK is lasting. The corneal reshaping done during surgery does not reverse over time. However, your eyes can still undergo natural changes due to aging, and in rare cases minor amounts of astigmatism may develop years later. If that happens and it affects your quality of vision, an enhancement procedure is often an option once the prescription has restabilized.
Yes. Many patients have a combination of astigmatism and either nearsightedness or farsightedness, and LASIK addresses all components of your prescription in a single treatment session. Your custom treatment plan is programmed to account for the full picture of your refractive error, not just one part of it.
Astigmatism above approximately 6 diopters may fall outside the safe treatment range for LASIK, depending on your corneal thickness and other individual factors. If that applies to you, a refractive lens exchange with a toric IOL or another corneal procedure may be a better fit. The right answer depends on your complete evaluation, not just one measurement.
The evaluation process is thorough for all LASIK candidates, but for patients with astigmatism our LASIK Surgeons pay particularly close attention to the pattern and axis of your astigmatism, which refers to the orientation of your cornea's irregular curvature. Corneal topography and wavefront measurements are essential parts of this process and help determine not just whether you are a candidate, but which treatment approach will produce the best outcome for your eye.
Most symptoms in the days following LASIK, including mild blurring, scratchiness, and light sensitivity, are a normal part of healing. However, certain signs require prompt attention: sudden or significant vision loss, severe pain that does not ease, increasing redness or discharge, a persistent sensation that something is in your eye, or new flashes of light or floating spots. If you experience any of these, contact your care team right away rather than waiting for a scheduled follow-up.
The timeline between your comprehensive LASIK evaluation and surgery varies depending on what the evaluation finds and whether any preparatory steps, such as dry eye treatment or prescription stabilization, are needed first. If you are a straightforward candidate, surgery can often be scheduled relatively soon after your evaluation is complete. Your LASIK Surgeon will walk you through the expected timeline at your consultation.
Schedule Your LASIK Evaluation at Rhode Island Eye Institute
If you have astigmatism and are curious about your options for vision correction, we invite you to schedule a comprehensive evaluation with our team. Rhode Island Eye Institute brings together fellowship-trained LASIK Surgeons, advanced diagnostic technology, and a patient-centered approach that has earned the trust of thousands of patients across the region. We are here to help you understand exactly what is possible for your vision and to guide you toward the choice that is right for you.