Vision regression after LASIK: causes, rates and options
What is vision regression after LASIK?
Regression is a partial return of your original prescription after a good initial result. It usually develops slowly over months or years, and most people with mild regression still see well enough for daily life without glasses.
It is different from an initial under-correction, which shows up within the first weeks, and from normal fluctuation during healing. The FDA notes that vision can take three to six months to stabilise, so blur in the first months is not necessarily regression.
Regression is a known limitation of corneal reshaping rather than a surgical mistake, and good surgeons discuss it before surgery. Many clinics state in writing whether an enhancement within a set period is included in the price, so ask before you book.
How common is regression after LASIK?
Some drift is common; significant regression needing treatment is not. A long-term study from Japan by Ikeda and colleagues (2017), summarised on AAO EyeWiki, followed eyes treated for moderate to high myopia. Average regression was about −0.12 D a year in eyes treated for up to −10 D, and about −0.25 D a year in eyes treated for more than −10 D.
Second treatments are much less common. In a study of 9,177 eyes treated in 2005–2012, published in the Journal of Cataract and Refractive Surgery in 2017, 1.80% had at least one retreatment, and the two-year retreatment rate fell from 2.58% to 0.38% as technology improved.
| Measure | Published figure | Source |
|---|---|---|
| Annual regression, up to −10 D | About −0.12 D a year | Ikeda et al., 2017 |
| Annual regression, above −10 D | About −0.25 D a year | Ikeda et al., 2017 |
| Retreatment, any time | 1.80% of eyes | Pokroy et al., JCRS 2017 |
| Two-year retreatment, later years | 0.38% | Pokroy et al., JCRS 2017 |
Why does vision regress after LASIK?
Usually because the cornea remodels and, in some people, because the eye itself keeps changing.
- Epithelial remodelling: the surface layer thickens over the treated area, partly filling in the correction. This is more pronounced after larger treatments.
- Ongoing myopia: some eyes keep becoming more short-sighted, especially if the prescription was not stable before surgery.
- Ectasia: rarely, progressive corneal weakening causes worsening vision and astigmatism. This needs specialist treatment, not another laser.
- Lens changes: early cataract can shift vision towards short-sightedness later in life.
How do doctors tell regression from other problems?
With a careful refraction and corneal scans, repeated over time. A single blurry day is not regression; a measured change in prescription that persists across visits is.
- Refraction: confirms whether short-sightedness, long-sightedness or astigmatism has returned, and by how much.
- Corneal tomography: maps the shape and thickness of the cornea to rule out ectasia.
- Epithelial thickness mapping, where available: shows whether the surface layer has thickened over the treated zone.
- Tear film tests: dry eye makes vision fluctuate and can mimic regression.
- Lens examination: early cataract can shift the prescription later in life.
Bring your original pre-operative measurements to any new doctor. Comparing them with fresh scans is the quickest way to see what has changed, which is one reason the AAO advises keeping your records.
Who is most at risk of regression?
People with higher prescriptions, more astigmatism and older age. The 2017 JCRS study found retreatment more likely with age over 50 and astigmatism over 1.5 D, while larger treatment zones may lower the risk. Higher treated myopia regressed faster in the Ikeda study. A stable prescription for at least a year before surgery is one of the most important protections; see LASIK prescription limits and high myopia.
Is regression different after SMILE, PRK/LASEK or ICL?
All corneal procedures can regress; ICL works differently because it does not reshape the cornea.
| Procedure | Regression pattern | If more correction is needed |
|---|---|---|
| LASIK | Gradual; faster for high myopia | Flap lift or surface treatment |
| SMILE | Corneal remodelling still occurs | Retreatment is more complex; often PRK or LASIK-type options |
| PRK/ LASEK | Remodelling and haze can affect the result | Repeat surface treatment |
| ICL | No corneal remodelling; changes come from the eye itself | Lens exchange or laser touch-up |
What are the options if my vision regresses?
First, a full exam to find the cause. Dry eye can mimic regression, and ectasia must be ruled out with corneal tomography. Then:
- Glasses or contact lenses for specific tasks such as night driving.
- An enhancement, if the cornea is thick enough; see LASIK enhancement in Korea and the cost of LASIK enhancement.
- A lens-based option, such as ICL, for some higher prescriptions or thin corneas.
- Corneal cross-linking if ectasia is found; see corneal cross-linking in Korea.
The FDA says measurements should be consistent at two visits at least three months apart before any re-operation, and that some people cannot have one because too little corneal tissue remains.
Is it regression or presbyopia?
If your distance vision is still sharp but reading is getting harder after about 40, that is presbyopia, the normal ageing of the lens, not regression. See LASIK after 40. Ask whether enhancements are included in your clinic's price, and keep your records for any future surgeon. This is general information; ask your surgeon about your own eyes.
Sources
- AAO EyeWiki – LASIK complications (regression data, Ikeda et al.)
- BioMed Research International (2017) – Twelve-year follow-up of LASIK for moderate to high myopia
- ESCRS – Myopic LASIK retreatment: incidence and associations (JCRS 2017)
- FDA – What should I expect during and after surgery?
- AAO – LASIK laser eye surgery
Key facts
- Typical drift: about −0.12 D a year for up to −10 D; about −0.25 D a year above −10 D (Ikeda, 2017)
- Retreatment rate: 1.8% of eyes in a 9,177-eye study (JCRS, 2017)
- Higher risk: age over 50, astigmatism over 1.5 D, high prescriptions
- Before enhancement: stable readings at two visits at least 3 months apart (FDA)
- Options: glasses, LASIK enhancement, sometimes ICL
Related guides
Independent directory. Prices are typical ranges reported by Seoul clinics and change often. Always confirm a written quote and get a full eye exam before booking. This page is general information, not medical advice.
FAQ
Frequently asked questions
Can LASIK wear off?
The correction itself is permanent, but some people regress slightly over years, and the eye can keep changing with age. Most people keep good distance vision.
How common is regression after LASIK?
Mild drift is common, especially after high prescriptions. Only about 1.8% of eyes needed retreatment in a large 2017 study.
Can I have LASIK again if my vision regresses?
Often yes, if your cornea is thick enough and your prescription is stable over two visits at least three months apart. Some people are better suited to surface treatment or ICL.
Does SMILE regress less than LASIK?
Both reshape the cornea and both can regress. Long-term comparative data are still more limited for SMILE.
How soon after LASIK can regression happen?
It usually develops gradually over months to years. Blur in the first 3–6 months is more often healing or dry eye.
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