Who Is Actually a Candidate for LASIK?
Age, a stable prescription and a healthy cornea decide it, and the honest answer for some eyes is no. Here is what the evidence says, and what a proper assessment should cover.
LASIK is the most common refractive procedure in the world, and for the right eye it is genuinely life-changing. But the honest answer to “can I have LASIK?” is that a meaningful number of people cannot, and the reasons are knowable before anyone touches your eye.
The two baseline requirements
The US Food and Drug Administration sets two conditions that apply before anything else is considered.
You must be 21 or older. Younger eyes are often still changing, and correcting a prescription that has not settled means correcting a moving target.
Your prescription must be stable. The FDA specifies documented stability over the past year, defined as a change in sphere and cylinder of less than 0.5 dioptres.1 If your glasses have been updated twice in the last eighteen months, you are not ready yet. You are not disqualified, you are early.
What rules LASIK out
The FDA names several conditions as contraindications:1
- A thinning cornea. Keratoconus is the condition most often found here. LASIK removes corneal tissue, so operating on a cornea that is already structurally weak risks making it worse. This is the single most important reason corneal mapping is non-negotiable before surgery.
- Pregnancy or nursing, which can shift the cornea temporarily. This is a wait, not a refusal.
- Conditions that impair healing: collagen vascular disease such as rheumatoid arthritis, autoimmune conditions such as lupus, and immunodeficiency disorders.
- Certain medications, including isotretinoin (Accutane) and amiodarone (Cordarone).
Dry eye deserves its own conversation. It is both a reason for caution beforehand and the most commonly reported side effect afterwards. If your eyes are already dry, say so at the assessment rather than hoping it will not matter.
The side effects worth knowing before you decide
In the FDA’s own patient data, at three months after surgery:1
| Symptom | Patients reporting it worsened |
|---|---|
| Dry eye | 33.1% |
| Halos around lights | 20.8% |
| Glare | 17.7% |
| Night driving difficulty | 13.8% |
| Blurred vision | 12.6% |
Most of these settle over the months that follow. They are listed here not to discourage anyone, but because a patient who knows what the first weeks can feel like copes with them far better than one who was promised a flawless recovery.
What a proper assessment actually involves
A refractive assessment is not a quick look. It should include corneal topography to map the shape and thickness of your cornea, a measurement of your pupils, a tear film assessment, and a dilated examination of the retina. Taken together these decide not only whether you are a candidate, but which procedure suits you. Surface ablation such as PRK is sometimes the better answer for a thinner cornea, and an implantable lens may suit a prescription too strong for laser correction.
At Arab Eyes Center we use topography-guided treatment profiles, Contura and Custom-Q, which plan the correction from the measured shape of your own cornea rather than from the glasses prescription alone.
If the answer is no
Being told you are not a LASIK candidate is not the end of the conversation. PRK, ICL and lens-based options all exist, and each suits a different eye. A surgeon who tells you honestly that LASIK is wrong for you is giving you better care than one who proceeds anyway.
Find out whether LASIK suits your eyes
A full refractive assessment includes corneal mapping, pupil measurement and a dilated retinal examination.
Book an AppointmentSources
- U.S. Food and Drug Administration. Facts You Need to Know About Laser In Situ Keratomileusis (LASIK). Patient information booklet. accessdata.fda.gov
- Harvard Medical School, Department of Ophthalmology. Are You a Good Candidate for LASIK? eye.hms.harvard.edu
- American Academy of Ophthalmology. LASIK: Laser Eye Surgery. aao.org
This article is general information, not medical advice. Findings vary from person to person, and only an examination can tell you what applies to your eyes.