If you're 16 or 17, hate wearing glasses, and hate contacts even more, and you've read online that LASIK is quick and effective — you may be wondering why every reputable clinic in the US, Colombia, and essentially everywhere else refuses to operate on anyone under 18. The reason is not liability caution (though that's part of it). The reason is that the surgery, done on a young enough patient, doesn't produce a permanent result — and can actively make things worse over time.
Here's the biology behind the rule.
Your eyes are still growing (biologically)
Growth-plate closure — the finalization of long bone growth — happens in most people between ages 14 and 18. But less publicly, your eyeball also grows through your teenage years, though on a slightly different timeline and with more variability. The axial length of the eye (the distance from the cornea to the retina) is the primary variable that determines refractive error: longer eyes are more nearsighted, shorter eyes more farsighted.
In children and adolescents, axial length increases as the body grows. This process typically stabilizes in the late teens or early twenties — but "typically" hides significant individual variability. Some patients' eyes stabilize at 17. Some don't stabilize until 25.
Here's the problem for LASIK on a still-growing eye: if you correct someone's -3.00 nearsightedness at age 17, and their eye then continues elongating over the next few years, they will develop new nearsightedness on top of the LASIK correction. You've bought them a few years of good vision followed by a return to needing glasses — plus you've used up cornea in the process, potentially limiting their options for future re-treatment.
The prescription-stability rule
Every reputable LASIK clinic requires evidence of prescription stability before surgery. The standard threshold is at least 12 months of a stable prescription — meaning no more than 0.50 diopters of change in either eye's refraction over the preceding year.
For adults in their 20s, 30s, and 40s who've been stable for years, this requirement is easy to document. For teenagers whose prescriptions have historically changed every 6-12 months, it's usually impossible to demonstrate.
The under-18 age rule is essentially a proxy for the prescription-stability rule. Reputable surgeons don't want to be in the position of individually assessing which 16-year-olds are stable and which aren't; the false-positive rate would be uncomfortably high. So the industry default is: wait until 18, document 12 months of stability at that point, then consider surgery.
What "stability" means in practice
| Age range | Typical stability pattern | LASIK candidacy stance |
|---|---|---|
| Under 18 | Prescriptions changing 0.50-1.00 D per year is common | Not a candidate. Reputable clinics decline. |
| 18-21 | Some patients stable, others still changing | Candidate if documented 12 months of stability. Many surgeons prefer to wait until 21-22. |
| 21-40 | Most patients stable | Excellent candidacy window if other criteria met. |
| 40-45 | Emerging presbyopia may complicate | Candidate but monovision or alternative approaches worth discussing. |
| 45+ | Presbyopia dominant; consider RLE alternatives | Candidacy is more nuanced; often not the best procedure choice. |
Common exceptions (which mostly aren't exceptions)
"But my eyes have been stable for two years already, and I'm 16"
Reputable clinics still won't operate. The 18-year rule is a policy, not a case-by-case judgment. Even a demonstrably stable 16-year-old may resume progressing between 17 and 20. The risk-benefit calculation on operating early is unfavorable when you could simply wait 12-24 months and get a much more predictable outcome.
"But my parents will consent"
Parental consent doesn't change the clinical calculus. Reputable clinics don't decline for consent reasons — they decline for outcome reasons.
"But I have a really strong prescription that already makes my life difficult"
For very high prescriptions (typically -8.00 D and beyond) that meaningfully impair a young patient's daily life, the alternatives are ICL (implantable collamer lens) surgery or continuing with contacts/glasses until age 18-21. Some ICL surgeons will operate on adolescents in specific cases, but this is a narrow specialty and requires exceptional pediatric ophthalmology involvement — not a mainstream LASIK conversation.
"But military recruits get LASIK at 17"
The US military does perform PRK (not LASIK) on some 17-18 year old recruits under specific criteria including documented prescription stability, career-critical vision needs, and full military medical oversight. This is a special-population protocol, not a template for civilian consumer LASIK.
What to actually do if you're under 18
1. Keep documented records of your prescription changes
Every eye exam produces a written or digital prescription. Save them. Ideally get exams roughly annually so you have a longitudinal record. When you turn 18 and want to pursue LASIK, this documentation is the fastest path to demonstrating stability.
2. Consider ortho-K if you want daily-life vision without daytime lenses
Orthokeratology (ortho-K) uses overnight-worn rigid contact lenses that temporarily reshape the cornea, providing clear daytime vision without daytime lenses. It's fully reversible, is used in children and adolescents, and has evidence for slowing myopia progression in some patients. It's not a substitute for LASIK but can bridge the gap between now and your surgery-eligible years.
3. Investigate myopia control interventions
Modern myopia control includes low-dose atropine drops, ortho-K, dual-focus contact lenses, and specialty spectacle lenses. If your prescription has been progressing, these interventions may slow progression, resulting in a lower final prescription — which means better LASIK candidacy and outcomes when you're eligible.
4. Book a consultation on your 18th birthday if you want
You can be evaluated and start documenting stability from day one of eligibility. Most surgeons will still want the 12-month stability window before operating, meaning you'd realistically be looking at surgery at 19 rather than 18. But an early consultation gives you a plan and starts the clock.
If you encounter a clinic (in any country, including Colombia) that offers LASIK to patients under 18 without exceptional circumstances (career-critical military need, specific pediatric ICL indication with pediatric ophthalmology involvement), that's a significant red flag about the clinic's overall standards. Reputable clinics decline these cases. Clinics that don't decline them are prioritizing revenue over outcomes. Do not pursue surgery there, regardless of price.
Where Colombia sits on the age rule
Colombian LASIK clinics with international-quality standards uniformly enforce the 18-year minimum and 12-month stability requirement — the same policy applied at premium US, European, and Asian clinics. This is one of the least-variable elements of LASIK practice globally. If a Colombian clinic advertises "no age restrictions" or offers to operate on minors, that clinic is operating outside international standards regardless of what the local regulatory environment permits.