Laser Eye Surgery for Astigmatism

Astigmatism can cause blurred, distorted or shadowed vision that may affect driving, reading, screen use, sport and overall visual quality.

Modern laser eye surgery techniques may reduce or correct astigmatism in appropriately selected patients by reshaping the cornea to improve focusing accuracy.

Procedures such as LASIK, SMILE and PRK are not simply designed to reduce glasses dependence. Careful refractive planning also aims to improve the overall quality of vision where possible.

What Is Astigmatism?

Astigmatism is a refractive error caused by the cylindric focusing power of the corneal/ lens complex of the eye.

In most patients, this occurs because the cornea has different curvatures in different directions. Instead of focusing light sharply to a single point, the eye focuses light unevenly, which may produce:

  • blurred vision
  • ghosting
  • shadowing around letters
  • glare
  • halos
  • reduced night vision quality

Some patients tolerate small amounts of astigmatism reasonably well during the day yet still struggle with night driving, visual fatigue or reduced sharpness in dim lighting conditions.

Can Laser Eye Surgery Correct Astigmatism?

Yes, in many patients.

Modern refractive laser procedures can reshape the cornea to improve focusing symmetry and reduce astigmatism.

The amount of correction possible depends on:

  • corneal thickness
  • corneal shape
  • stability of the prescription
  • ocular surface health
  • pupil size
  • overall eye health

Not every patient with astigmatism is suitable for laser eye surgery.

Detailed assessment is important because irregular corneal shape or early keratoconus may increase risk in some patients.

LASIK for Astigmatism

LASIK reshapes the cornea beneath a thin corneal flap using an excimer laser.

For many patients, LASIK may provide:

  • rapid visual recovery
  • reduced refractive error
  • improved visual quality
  • reduced glare and ghosting

Modern LASIK planning may incorporate:

The goal is not simply to reduce prescription numbers, but to optimise the optical system of the eye where possible.

SMILE Surgery for Astigmatism

SMILE (Small Incision Lenticule Extraction) is a refractive surgery option that may be suitable for selected patients with astigmatism.

During the procedure, a femtosecond laser creates and removes a small lenticule within the cornea to reshape the eye and improve focusing accuracy.

Compared with some other refractive procedures, potential advantages may include:

  • a smaller incision
  • preservation of corneal biomechanics
  • reduced dry eye symptoms in selected patients

However, Refractive suitability varies between individuals and depends on factors such as:

  • the amount of astigmatism
  • corneal thickness
  • refractive prescription
  • ocular surface health
  • visual goals

PRK and TransPRK for Astigmatism

Surface laser treatments such as PRK or TransPRK may be considered in selected patients, particularly where flap-based surgery is less suitable.

This may include:

  • thinner corneas
  • some athletes
  • selected occupational requirements
  • irregular corneal conditions

Modern treatment planning may incorporate:

These approaches aim to improve both refractive error and corneal optical quality where possible.

Wavefront-Guided and Topography-Guided Treatments

Not all astigmatism is identical.

Some patients have relatively simple refractive astigmatism, while others develop more complex optical irregularities involving higher-order aberrations.

Advanced treatment planning may incorporate:

In selected patients, this may help improve:

  • contrast sensitivity
  • night vision quality
  • glare
  • ghosting
  • visual sharpness

What About Irregular Astigmatism?

Irregular astigmatism differs from standard refractive astigmatism.

It may occur because of:

  • keratoconus
  • pterygium
  • corneal scarring
  • previous eye surgery
  • trauma

These patients often require more detailed assessment because some forms of laser surgery may worsen unstable corneal conditions.

In selected cases, combined approaches involving:

  • corneal cross-linking
  • topography-guided treatment
  • specialty contact lenses
  • corneal procedures

may be considered.

Can Laser Eye Surgery Improve Visual Quality?

Potentially, yes.

Many patients seeking astigmatism correction are not simply trying to reduce glasses dependence.

Some are primarily troubled by:

  • ghosting
  • night glare
  • visual fatigue
  • reduced clarity
  • poor quality of vision despite glasses

Visual quality depends on more than standard visual acuity alone.

Factors including:

  • higher-order aberrations
  • tear film quality
  • pupil size
  • corneal regularity
  • ocular surface health

may all influence symptoms.

This is one reason detailed refractive assessment remains important.

Can Laser Eye Surgery Treat Amblyopia?

Although, Laser eye surgery can correct refractive error, but it does not directly reverse amblyopia itself.

Instead, amblyopia is a neurodevelopmental condition involving incomplete visual pathway development during childhood.

If these pathways do not develop adequately during the critical period of visual development, laser surgery later in life cannot fully rebuild them.

However, some patients with amblyopia may still benefit from refractive surgery to reduce their refractive error once the prescription is stable to optimise their visual potential.

What Happens During Assessment for Astigmatism Surgery?

Assessment may include:

  • refraction
  • corneal topography
  • corneal tomography
  • wavefront analysis
  • tear film assessment
  • pupil analysis
  • retinal examination

The purpose is not simply to determine whether surgery is technically possible.

The goal is to determine:

  • whether surgery is appropriate
  • which procedure may be most suitable
  • whether realistic expectations are present
  • whether corneal health is stable

When Should Someone Consider Laser Eye Surgery for Astigmatism?

A detailed refractive assessment may be appropriate if:

  • glasses are inconvenient
  • contact lenses are uncomfortable
  • vision remains poor quality despite correction
  • glare or ghosting is problematic
  • refractive error is stable
  • corneal measurements are suitable

Not every patient with astigmatism is a suitable candidate for surgery.

Careful assessment helps determine whether surgery is likely to provide meaningful visual benefit.

Book a consultation

Eye and Laser Surgeons — Bondi Junction & Miranda

Bondi Junction: (02) 9387 5300
Miranda: (02) 9531 5300
Email: reception@eyeandlaser.com.au

FAQ SECTION

Can LASIK fix astigmatism?

Yes. LASIK can correct many forms of regular astigmatism in suitable candidates.

Can SMILE surgery correct astigmatism?

Yes. SMILE may treat selected patients with astigmatism depending on corneal measurements and prescription.

Is PRK better for astigmatism?

PRK may be preferable in some patients depending on corneal thickness, occupation, sport or ocular surface considerations.

Can laser eye surgery improve night glare from astigmatism?

Potentially. Some patients experience improvement in glare and ghosting after treatment, although outcomes vary depending on the underlying optics of the eye.

Can laser eye surgery cure amblyopia?

No. Laser eye surgery corrects refractive error but does not recreate neural pathways affected by amblyopia.

What is irregular astigmatism?

Irregular astigmatism occurs when the corneal surface becomes uneven or asymmetrical, often due to keratoconus, scarring or previous surgery.

Book your free suitability consultation with Dr Daya Sharma today, or as a first step, take our online suitability self-test now.