Astigmatism: Causes, Symptoms & All Treatment Options Explained

What Astigmatism Actually Is

Astigmatism happens when the cornea (or sometimes the natural lens) is shaped more like a rugby ball than a perfect basketball. Light rays don't focus to a single point on the retina — they scatter into multiple focal points, causing blurred or distorted vision.

Unlike myopia (only distance is blurred) or hyperopia (only near is blurred), astigmatism affects all distances.

Symptoms of Astigmatism

Common signs include:

• Blurred or distorted vision at all distances
• Headaches, especially after reading or screen work
• Eye strain and fatigue
• Squinting to see clearly
• Double vision in one eye
• Difficulty seeing at night, especially driving
• Halos and starbursts around lights

Mild astigmatism (under -0.75 cyl) often goes unnoticed but causes subtle eye strain. Higher amounts (-1.5 cyl and above) significantly affect daily life.

What Causes Astigmatism?

Most astigmatism is inherited — you're born with it or develop it during early growth. Other causes:

• Genetic predisposition — runs in families
• Eye injuries or surgeries
• Keratoconus — progressive corneal thinning that causes irregular astigmatism
• Constant eye rubbing (especially in children with allergies)
• Eyelid pressure — chalazion, ptosis can distort the cornea

Astigmatism is NOT caused by reading in dim light, watching TV close, or wearing wrong glasses (common myths).

Treatment Options

Glasses with cylindrical power: The simplest correction. Modern spec lenses correct any amount of astigmatism.

Toric contact lenses: Special soft contacts designed for astigmatism. More expensive than regular contacts but provide good correction. Need to be properly fitted.

LASIK: Can correct astigmatism up to about -5.0 D in suitable eyes. Femto LASIK and Contoura Vision are both used. Recovery in 24-48 hours.

ReLEx SMILE: Corrects astigmatism up to -5.0 D. Good option if you also want to avoid flap-related restrictions.

Toric ICL: For high astigmatism beyond LASIK limits, or thin corneas. Implantable lens with built-in astigmatism correction.

Toric IOL (during cataract surgery): Corrects astigmatism while removing the cataract. Worth discussing if you have both.

When Astigmatism Is a Warning Sign

Most astigmatism is harmless, but rapid changes or unusual patterns can signal:

• Keratoconus: Progressive corneal thinning. If your astigmatism prescription is increasing every 6-12 months, especially in your teens or 20s, get a corneal topography scan. Early keratoconus can be halted with corneal cross-linking (CXL).
• Eye injury: Sudden astigmatism after trauma needs evaluation.
• Pterygium: A growth on the eye surface can distort the cornea — surgical removal corrects it.

Annual eye exams catch these issues early, when they're most treatable.

Can LASIK Treat Astigmatism? How It Works and Its Limits

Yes — LASIK treats regular astigmatism by reshaping the cornea more in one direction than the other, so its curve becomes more evenly rounded. Modern lasers track eye movement and compensate for the slight rotation of the eye when you lie down, which helps place the correction along the right axis.

The key distinction is between regular and irregular astigmatism:

• Regular astigmatism — the common, inherited type with a symmetrical pattern on topography — responds very well to LASIK, SMILE and Contoura Vision, usually up to about -5.0 D.
• Irregular astigmatism — from keratoconus, corneal scarring or previous surgery — is a different problem. Keratoconus is usually a reason to avoid laser vision correction; the priority is stabilising the cornea, often with cross-linking. Some irregular corneas from scars or old surgery can be improved with topography-guided treatment in selected cases.

Astigmatism that comes from the natural lens rather than the cornea also behaves differently and may be better addressed during lens or cataract surgery with a toric IOL.

Can LASIK Cure Astigmatism Permanently?

For regular corneal astigmatism, LASIK permanently changes the shape of the cornea, so the correction is long-lasting in most patients. 'Cure' is reasonable in the sense that you no longer need cylindrical lenses — but a few honest caveats apply:

• A small amount of cylinder can remain after surgery, particularly with higher starting values. It is often too small to notice; if it matters, an enhancement may be possible.
• Astigmatism can change naturally over decades (see below), so a small amount may reappear late in life.
• Lens-related astigmatism that develops with cataract is not affected by previous LASIK and can be corrected at the time of cataract surgery.

Can Astigmatism Worsen With Age?

Yes, astigmatism can change gradually with age, although in most adults it stays fairly stable from the twenties to the forties. Over several decades, the axis of astigmatism commonly shifts slowly as the cornea and eyelids change, so a small change in your cylinder after 50 is normal.

Changes that deserve attention:

• Rapid increase in your teens, twenties or thirties, especially with a changing axis — this can be a sign of keratoconus and needs a corneal topography scan.
• New or changing astigmatism after 50 along with blur or glare — this can come from early cataract, which changes the shape and focus of the natural lens.
• Sudden change after an injury, surgery or a growth on the eye (such as pterygium or a chalazion pressing on the cornea).

Regular eye check-ups keep track of these changes and catch keratoconus while it can still be stabilised.

Is Astigmatism Treatable Naturally?

No — there is no scientifically proven natural cure for astigmatism. Eye exercises, yoga, palming, diet, supplements and home remedies cannot reshape the cornea, so they cannot remove a cylinder value from your prescription.

What natural measures can do:

• Reduce eye strain and dryness — regular breaks, good lighting and blinking make vision more comfortable, but the astigmatism itself does not change.
• Prevent worsening in some cases — treating eye allergies and avoiding vigorous eye rubbing lowers the risk of keratoconus, which causes irregular astigmatism.

Astigmatism is corrected only by glasses, toric contact lenses or surgery (LASIK, SMILE, Contoura Vision, toric ICL or toric IOL). Be cautious of any product or programme that promises to 'cure' it without these.