What regression actually is
Regression is a partial return of the original refractive error after laser surgery. It is caused by the cornea's healing response: the epithelium thickens over the flattened zone (epithelial hyperplasia) and the stroma remodels slightly, both of which add back some curvature. It is most pronounced in the first three to six months, then slows. Most patients end up within half a diopter of target; a minority drift further.
Regression vs the things that look like it
| Cause | Pattern | What confirms it |
|---|---|---|
| True regression | Gradual return of myopia or hyperopia, stable cornea shape | Refraction plus normal tomography |
| Presbyopia | Near vision fades after 40; distance fine | Age and near-add testing |
| Ectasia | Increasing irregular astigmatism, glasses do not fully help | Tomography showing steepening and thinning |
| Early cataract | Myopic shift plus glare, usually over 50 | Slit-lamp lens exam |
| Dry eye | Fluctuating blur that improves with drops or blinking | Tear film testing |
Do not accept a new glasses prescription as the whole answer for changed vision after LASIK. Any drift should trigger tomography to rule out ectasia before an enhancement is considered.
Who regresses more
- High corrections, especially above -6 D for myopia and any hyperopic treatment above +3 D
- Hyperopic LASIK in general, which regresses more than myopic
- Younger patients whose prescriptions were not fully stable
- Patients with thicker epithelium and strong healing responses
- Older ablation profiles with small optical zones
Options when it matters
Do nothing. If you are seeing 20/25 and comfortable, a small residual is common and many people never touch it.
Glasses for specific tasks. Night driving glasses for a residual -0.75 D is a normal outcome, not a failure.
Enhancement. If there is enough residual stromal bed (typically 300 microns or more), the surgeon can lift the original flap (within roughly the first two to five years) or perform PRK on top of the flap for later cases. Enhancements are done for around 3 to 8 percent of patients depending on the practice, and most Colombian clinics include one enhancement within the first 12 to 24 months in their package. Check the terms in writing. See enhancement rates and rules.
ICL or lens-based correction if the cornea cannot safely take more laser.
Enhancement timing rule of thumb
Wait until the refraction has been stable on two visits at least three months apart, and never before six months after the original surgery. Enhancing a moving target produces another moving target.
If you had surgery in Colombia and drift at home
Have a local optometrist or ophthalmologist document the refraction and, ideally, tomography. Send both to your Colombian surgeon. Many clinics will do the enhancement at low or no cost within their guarantee window, which may make a second trip worthwhile if the residual is significant; for a small residual, glasses may be the rational choice. Read coordinating US follow-up care.
Frequently asked questions
How common is LASIK regression?
Small amounts are common. Regression large enough to consider enhancement occurs in roughly 3 to 8 percent of patients, more in high and hyperopic corrections.
Can regression be prevented?
Not entirely. Modern ablation profiles, larger optical zones, waiting for a stable prescription, and controlling dry eye all reduce it.
Is regression the same as LASIK wearing off?
No. The treated cornea does not wear off. Regression is a healing effect in the first year or two; changes decades later are usually the lens aging, not the cornea.
Vision changed after LASIK abroad?
Send us your original operative report and a recent refraction. We can check what your Colombian clinic's enhancement policy covers and whether a return visit makes sense.
WhatsApp Andy in MedellínRequest a quote