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Cataracts and Astigmatism: Which Should You Treat First?

If you’ve been diagnosed with both cataracts and astigmatism, you might wonder whether one condition needs to be treated before the other. The good news is that cataracts and astigmatism are commonly treated together rather than separately.

15 June 2026

Educational Disclaimer: This information is for educational purposes only and is not medical advice. Always consult your eye care specialist for personalised guidance on your individual treatment options, lens choices, and expected visual outcomes.

Cataracts and Astigmatism: Which Should You Treat First?

If you’ve been diagnosed with both cataracts and astigmatism, you might wonder whether one condition needs to be treated before the other. The good news is that cataracts and astigmatism are commonly treated together rather than separately. Modern cataract surgery provides an ideal opportunity to address both conditions simultaneously, potentially improving your vision more comprehensively than treating cataracts alone.

This guide explains how cataracts and astigmatism differ, why they’re often treated together, how surgeons correct astigmatism during cataract surgery, and what you can expect from combined treatment. Treatment planning depends on several factors, including the severity of your astigmatism, your overall eye health, your lifestyle needs and the type of intraocular lens you choose.

What’s the Difference Between Cataracts and Astigmatism?

Cataracts and astigmatism are two distinct eye conditions that can affect your vision in different ways. While they’re separate problems, they can occur together, and their symptoms can sometimes overlap.

Symptoms of Cataracts

Cataracts occur when the eye’s natural lens becomes progressively cloudy due to protein build up. This cloudiness blocks light from passing through clearly, leading to:

  • Cloudy or blurry vision: Objects appear hazy or fuzzy, regardless of distance
  • Glare sensitivity: Bright lights, sunlight, or vehicle headlights cause noticeable glare
  • Faded colours: Colours appear dull or yellowed rather than vibrant
  • Poor night vision: Driving at night becomes difficult due to reduced contrast and increased glare
  • Difficulty reading and driving: Close-up tasks and distance tasks can become increasingly challenging

Cataracts typically develop gradually over years, with most cases being age-related. Initially, symptoms are mild and may barely be noticeable. Over time, cloudiness increases, and vision deteriorates more noticeably.

Symptoms of Astigmatism

Astigmatism is a refractive error caused by an irregularly shaped cornea or lens. Instead of being perfectly round, the eye’s surface curves unevenly, causing light to focus on multiple points rather than one precise point on the retina. This results in:

  • Blurred or distorted vision: Vision is unclear at all distances, not just near or far
  • Eye strain and headaches: Your eye muscles work harder to compensate for the irregular focusing, leading to fatigue and discomfort
  • Difficulty focusing: Your eyes struggle to maintain sharp focus, particularly when concentrating on detailed tasks
  • Sensitivity to light: Glare and bright lights may cause discomfort

Unlike cataracts, which develop gradually, astigmatism is often present from birth or develops in childhood. Many people live with mild astigmatism their entire lives without realising it, particularly if they’re accustomed to wearing glasses or contact lenses.

Can Cataracts Cause or Worsen Astigmatism?

This is an important question often inadequately covered in patient education materials, and understanding the answer helps clarify why combining treatment is beneficial.

Cataracts themselves do not directly cause corneal astigmatism. Your cornea’s shape is determined by your eye’s structure and doesn’t change when a cataract develops. However, changes within the eye’s lens during cataract development can alter how your eye focuses light overall, and this can make astigmatism more noticeable.

Here’s the distinction: Corneal astigmatism is caused by an irregularly shaped cornea (the clear front surface of your eye). Lenticular astigmatism is caused by changes in the eye’s lens. As a cataract develops, the lens changes shape and composition, which can alter the overall refractive error your eye experiences. This might make astigmatism that was previously mild and manageable suddenly feel more pronounced.

Additionally, as cataracts progress, they scatter light irregularly, which can amplify the visual distortion caused by underlying astigmatism. This is why some patients report that their astigmatism “worsened” along with their cataracts – it’s not that astigmatism itself changed, but rather the combined effect of cataracts plus astigmatism creates more noticeable visual distortion.

Should Cataracts or Astigmatism Be Treated First?

The straightforward answer: Cataracts and astigmatism are typically treated during the same procedure.

Because cataract surgery involves removing your cloudy natural lens and replacing it with an artificial intraocular lens (IOL), this procedure provides the perfect opportunity to correct astigmatism at the same time. There’s no need to treat them separately or address cataracts first and astigmatism later – modern cataract surgery can tackle both in a single operation.

Why combine treatment:

Modern cataract surgery is about more than simply removing cloudiness. It’s an opportunity to comprehensively improve your overall visual quality. Your eye surgeon will measure your cornea carefully before surgery to determine the best approach to correct both your cataract and your astigmatism simultaneously.

Treating astigmatism during cataract surgery can significantly reduce your dependence on glasses after surgery. If astigmatism is left untreated, you may still experience blurred or distorted vision after successful cataract removal, requiring continued glasses use or potentially additional corrective procedures later.

Modern alternatives to separate procedures:

In the past, patients with cataracts and astigmatism sometimes required separate procedures. However, with advances in IOL technology and surgical techniques, separate astigmatism procedures are rarely necessary today. The only exceptions are cases involving particularly complex or irregular astigmatism, or situations where specific clinical factors make combined treatment unsuitable – something your surgeon will discuss if relevant to your case.

How Cataract Surgery Can Correct Astigmatism

If you’re wondering how a single surgical procedure addresses both conditions, here’s how it works:

Toric Intraocular Lenses (Toric IOLs)

The primary method of correcting astigmatism during cataract surgery is through the use of a toric IOL – a specially designed artificial lens that differs from standard IOLs by incorporating astigmatism correction into the lens itself.

Think of a standard IOL as having the same curvature all the way around (like a sphere). A toric IOL, by contrast, has different curvatures in different meridians, similar to a rugby ball shape. This allows the lens to correct the irregular focusing caused by your cornea’s astigmatism.

Precise alignment is critical:

Unlike standard IOLs, which work regardless of their orientation, a toric IOL must be positioned at a specific angle during surgery to provide effective astigmatism correction. Your surgeon uses special markings on your eye and advanced imaging to align the toric lens precisely. Correct alignment is essential for optimal results – even a small rotational error can reduce the effectiveness of astigmatism correction.

IOL selection depends on astigmatism severity:

Your surgeon will choose a toric IOL with the specific amount of astigmatism correction needed for your eye. Different toric lens models correct different amounts of astigmatism, and your pre-operative measurements determine which lens is most suitable for you.

For more detailed information about IOL options and how they work, please see our guide: Intraocular Lenses (IOL): What Are They? and Monofocal vs Multifocal vs EDOF vs Spiral IOLs: What’s the Difference?

Limbal Relaxing Incisions (LRIs)

In some cases, particularly for mild astigmatism, your surgeon may use an alternative or complementary technique called limbal relaxing incisions (LRIs). This involves making small, precise corneal incisions at specific locations around the eye to flatten the cornea slightly and reduce astigmatism.

When LRIs are used:

  • For mild to moderate astigmatism (typically less than 1.5 diopters)
  • When toric IOLs aren’t available or suitable
  • In combination with toric IOLs for particularly significant astigmatism

LRIs are simpler than traditional astigmatism procedures because they’re performed during the same cataract surgery, requiring no additional surgery. However, they’re less predictable than toric IOLs and results can be more variable. This is why toric IOLs have become the preferred method for most astigmatism correction during cataract surgery.

Can Cataract Surgery Correct Near-sightedness Too?

You may have seen the phrase “can cataract surgery correct astigmatism and near-sightedness” and wondered if cataract surgery addresses multiple refractive errors simultaneously.

The answer is yes, to a significant extent.

Modern IOL technology allows your surgeon to select a lens that not only corrects your cataract but also addresses your myopia (near-sightedness), hyperopia (long-sightedness), astigmatism, or presbyopia (age-related reading vision changes), depending on which IOL type you choose.

For example:

  • A monofocal toric IOL corrects astigmatism and sets your distance vision clearly, but you’ll still need reading glasses.
  • An EDOF toric IOL provides astigmatism correction plus a broader range of vision than a standard monofocal lens.
  • A multifocal toric IOL combines astigmatism correction with vision at multiple distances, potentially reducing your need for glasses altogether.

The specific refractive errors that can be corrected depend on your individual eye measurements, the IOL options available, and your surgical goals. Your surgeon will discuss which combination of corrections is most suitable for your vision needs.

What Happens If Astigmatism Isn’t Corrected During Cataract Surgery?

This is an important consideration that clarifies why treating astigmatism during cataract surgery is advantageous.

If astigmatism remains uncorrected after cataract surgery, you may still experience blurred or distorted vision despite successful cataract removal. The cloudiness from your cataract is gone, and your vision improves significantly, but the underlying astigmatism continues to cause visual distortion.

Likely outcomes without correction:

  • Continued glasses dependence: You’ll likely still need glasses to correct astigmatism, even after your cataract is removed
  • Reduced visual satisfaction: While your cataract surgery improves your overall vision, residual astigmatism may prevent you from achieving the clearest possible vision
  • Need for additional procedures: Some patients who don’t have astigmatism corrected during cataract surgery later seek additional refractive procedures (such as LASIK or implantable contact lenses) to address the astigmatism separately

Important nuance:

Not all astigmatism requires surgical correction. Mild astigmatism (generally less than 0.75 diopters) may not significantly impact vision quality after cataract surgery, and patients may achieve satisfactory visual outcomes with glasses if needed. However, moderate to significant astigmatism typically warrants correction during cataract surgery to maximise visual potential and reduce glasses dependence.

Who Is Suitable for Combined Cataract and Astigmatism Treatment?

While combined treatment is suitable for most patients with both conditions, suitability depends on several clinical and lifestyle factors.

Factors Surgeons Assess Before Surgery

Your eye care specialist will evaluate several factors to determine your suitability for combined treatment:

Corneal mapping and measurements: Precise corneal topography (detailed mapping of your cornea’s shape) helps identify the exact type, amount and axis of astigmatism. This information is critical for selecting and positioning toric IOLs correctly.

Eye dominance: Your surgeon may consider which eye is dominant (the eye your brain preferentially uses for detailed vision). This can influence lens selection, particularly if you’re considering premium multifocal or EDOF lenses.

Pupil size: Larger pupils can potentially increase the visual side effects (halos, glare) associated with some premium IOL types, which is a consideration when selecting lenses.

Existing refractive error: Your overall prescription – including any myopia, hyperopia, or presbyopia – influences which IOL is most suitable for achieving your desired visual outcomes.

Overall ocular health: Conditions affecting the retina, optic nerve, or other eye structures may influence whether toric IOL implantation is advisable or how realistic certain vision outcomes are.

When Toric Lenses May Not Be Recommended

While most patients with astigmatism benefit from toric IOLs, specific scenarios may make them less suitable:

Irregular corneas: If your cornea has an irregular shape due to scarring, keratoconus, or other conditions, standard toric IOLs may not provide optimal correction. Your surgeon might recommend alternative approaches.

Advanced eye disease: Conditions such as advanced glaucoma, significant retinal disease, or macular degeneration may affect how much vision improvement is realistic from any IOL, including toric lenses.

Your eye care specialist will discuss whether toric IOLs are suitable for your specific situation and what realistic outcomes are based on your eye health.

Will You Still Need Glasses After Cataract and Astigmatism Surgery?

This is one of the most common questions patients ask, and the honest answer is: It depends on your lens choice and individual factors.

With properly corrected astigmatism and standard monofocal toric IOL:

Many patients experience significantly reduced reliance on glasses for distance vision. If your astigmatism is fully corrected and your monofocal IOL is set for distance, driving and watching television should be clear without glasses. However, you’ll likely still need reading glasses for close-up tasks.

With EDOF toric IOL:

You’ll experience a broader range of clear vision than with standard monofocal lenses, particularly for intermediate distances like computer work. Reading glasses may still be needed for fine print, but the range where you see comfortably without glasses is wider.

With premium multifocal toric IOL:

You’re more likely to achieve broader glasses independence, potentially seeing clearly at distance, intermediate (arm’s length), and near (reading distance) without constantly switching eyewear. However, some patients may still prefer or need glasses for very detailed work or in certain lighting conditions.

Even with optimal lens selection and surgical technique, outcomes vary based on:

  • How your individual eye heals and adapts
  • The precise power of lens selected for your specific measurements
  • Your brain’s ability to adapt to the new lens (neuroadaptation)
  • Whether other vision conditions are present

Realistic framing: rather than promising complete freedom from glasses, think of combined cataract and astigmatism surgery as offering you the best possible foundation for clear, comfortable vision with minimal glasses dependence. Many patients find this outcome life-changing compared to their pre-surgery visual limitations.

Recovery After Combined Cataract and Astigmatism Surgery

Recovery from combined cataract and astigmatism surgery is generally very similar to standard cataract surgery. Your eye requires time to heal, and vision gradually improves weeks and months.

Timeline:

  • First 24-48 hours: Expect blurred vision, mild discomfort, light sensitivity, and watery eyes – all normal parts of early healing
  • First week: Vision typically improves noticeably, though may remain somewhat fluctuating
  • Weeks 2-4: Most patients see substantial improvement with vision becoming progressively clearer
  • Full stabilisation: Complete visual stability typically occurs within 4–8 weeks, though subtle improvements can continue for several months

Initial vision fluctuation:

It’s normal for your vision to fluctuate in the days and weeks after surgery. Clarity may vary throughout the day or from day to day as your eye heals and your brain adapts to your new lens with astigmatism correction. This is part of normal healing and generally settles as recovery progresses.

For detailed guidance on recovery expectations, activity restrictions, aftercare, and when you can return to normal activities like driving, please see our comprehensive recovery guide: Recovery After Cataract Surgery: What To Expect

Questions to Ask Your Eye Surgeon Before Treatment

Before proceeding with combined cataract and astigmatism surgery, consider discussing these important topics with your surgeon:

About lens options:

  • What toric IOL options are available to me?
  • Will astigmatism correction be included in my surgical plan?
  • Are multifocal or EDOF toric options available if I want to reduce reading glasses dependence?

About expected outcomes:

  • Based on my specific measurements, how much astigmatism correction can I expect?
  • What vision outcomes should I realistically expect after surgery?
  • Am I likely to still need glasses after surgery? If so, for what tasks?

About the procedure:

  • What happens if my astigmatism is particularly significant or irregular?
  • Will you use any additional techniques like limbal relaxing incisions?
  • Are there any risks specific to toric IOL implantation I should know about?

About recovery:

  • What’s the typical recovery timeline for me?
  • When can I expect clearer vision?
  • When can I resume normal activities?

Conclusion

Cataracts and astigmatism are commonly treated together using modern surgical techniques and advanced intraocular lens technology. Rather than requiring separate procedures, a single cataract surgery provides the opportunity to address both conditions simultaneously, potentially improving your vision more comprehensively than treating cataracts alone.

Key takeaways:

  • Cataracts and astigmatism are different conditions that often occur together.
  • Modern cataract surgery offers an ideal opportunity to correct astigmatism through toric IOLs or other techniques.
  • Treating astigmatism during cataract surgery can significantly reduce your glasses dependence.
  • Your suitability for combined treatment and realistic outcomes depend on your individual eye health, astigmatism severity, and lifestyle needs.
  • Recovery is generally similar to standard cataract surgery, with most patients seeing substantially improved vision within weeks.

Because every patient’s vision needs and eye health profile are different, personalised treatment planning with your eye care specialist is essential. They’ll assess your individual circumstances and recommend the most suitable approach to give you the best possible visual outcomes.

Frequently Asked Questions About Astigmatism and Cataract Surgery

Can Cataract Surgery Fix Astigmatism Permanently?

Toric IOLs are designed to provide permanent astigmatism correction. Once implanted and properly aligned, the lens remains stable and continues to correct astigmatism throughout your lifetime. However, outcomes depend on precise surgical alignment and your individual healing response. Very rarely, minor changes in astigmatism amount can occur due to corneal changes over many years, but significant regression is uncommon with modern toric IOLs.

What Type of Cataract Lens Is Best for Astigmatism?

The best lens depends on your individual needs. Monofocal toric IOLs are excellent for patients who prioritise sharp distance vision and are comfortable using reading glasses. Multifocal or EDOF toric IOLs are better suited for patients who want broader glasses independence and multiple clear focal distances. Your surgeon will recommend the most suitable option based on your measurements, lifestyle, and expectations.

Is Cataract Surgery More Complicated if You Have Astigmatism?

Combined cataract and astigmatism surgery is not significantly more complicated than standard cataract surgery, though it does require careful pre-operative measurements and precise surgical alignment of the toric IOL. The basic surgical technique remains the same; the main difference is in the planning and lens selection.

Is the Procedure Painful?

No. You’ll receive local anaesthetic (numbing drops), so you won’t feel pain during surgery. You may feel mild pressure or slight sensations, but pain should not occur.

Can You Have Cataract Surgery if You Already Wear Glasses for Astigmatism?

Yes, absolutely. Many patients wear glasses for astigmatism before cataract surgery. In fact, your current glasses prescription provides helpful information for your surgeon about your astigmatism, which aids in planning your surgical correction. Having worn glasses for astigmatism doesn’t change your suitability for combined treatment.

How Long Does It Take to Recover From Toric Lens Cataract Surgery?

Recovery timelines are generally similar to standard cataract surgery. Most patients notice improved vision within days to the first week, with continued improvement over 4-8 weeks. Full visual stabilisation typically occurs within 4-8 weeks, though neuroadaptation can continue for several months. Your surgeon will provide specific guidance based on your individual healing.

Ready to explore your options? Schedule a consultation with your eye care specialist to discuss whether combined cataract and astigmatism treatment is right for you.