Yes, the correction LASIK makes is permanent: the laser reshapes your cornea, and that new shape stays. What LASIK can’t do is stop your eyes from ageing. Most people keep sharp distance vision for many years, but reading glasses still arrive in the 40s, and a small number of people see their prescription drift and need a touch-up.
So the honest answer is “permanent correction, not a permanent freeze on your eyes.” Here’s what that means in practice, and how to choose a clinic that gives you the best chance of a result that lasts.
What exactly does LASIK change?
Your cornea is the clear front window of the eye. In short-sight, long-sight and astigmatism, its curve doesn’t focus light exactly on the retina.
In LASIK, a femtosecond laser creates a thin flap, and an excimer laser then removes a precise, microscopic amount of corneal tissue underneath to reshape it. The flap is laid back down. The tissue that’s removed doesn’t grow back, which is why the correction itself is lasting.
Your vision usually settles over the first few weeks. The US FDA notes that it can take three to six months for vision to fully stabilise after LASIK, and that some people notice glare or halos during that time.
What do long-term studies show?
LASIK has been performed for more than 25 years, so there is real long-term data, not just short-term trial results.
Studies that followed patients for ten years, such as a 10-year follow-up of LASIK for myopia up to −10 dioptres, found that the correction largely held. Where change happened, it was usually a small drift back towards short-sight, seen more often in people who started with high prescriptions.
In everyday terms:
• People with low to moderate prescriptions usually keep their result for many years.
• People with high prescriptions have a slightly higher chance of a small regression.
• A minority need a second, smaller laser treatment, called an enhancement.
The US Federal Trade Commission’s guide to LASIK basics notes that a five to 15 percent retreatment rate is not unusual. That’s worth asking any clinic about directly.
Why might vision change after LASIK?
If your vision changes years later, it’s usually one of these, not the LASIK “wearing off”:
| Reason | What happens | Can it be treated? |
| Presbyopia (after 40) | Near focus weakens as the eye’s natural lens stiffens | Reading glasses, or lens-based options later |
| Myopic regression | A small return of short-sight, more likely with high prescriptions | Often, with an enhancement if the cornea is thick enough |
| Prescription wasn’t stable before surgery | The eye was still changing when LASIK was done | Depends on the cause |
| Cataract (usually 60s onwards) | The natural lens clouds with age | Cataract surgery |
| Dry eye | Vision fluctuates through the day | Yes, with drops and eyelid care |
That first row matters most. If you have LASIK at 25, you will most likely still need reading glasses at around 45. That isn’t LASIK failing; it happens to everyone, with or without surgery.
Who gets the most lasting result?
Long-term success starts before surgery, with choosing the right eyes. Good candidates usually:
• Are at least 18, and ideally in their early 20s or older.
• Have had a stable prescription for at least a year.
• Have a cornea that is thick enough and has a normal shape.
• Don’t have uncontrolled dry eye, keratoconus or other corneal disease.
• Have realistic expectations about reading vision after 40.
If you’re not suitable for LASIK, that doesn’t mean you’re stuck with glasses. SMILE, PRK or an implantable contact lens (ICL) may suit your eyes better.
What a good LASIK clinic checks before saying yes
The best predictor of a lasting LASIK result is a careful screening. A clinic that says yes after a quick eye test isn’t doing you a favour. At a minimum, look for:
1. Corneal topography and tomography. Maps the shape and both surfaces of the cornea to rule out early keratoconus, which can worsen after LASIK.
2. Corneal thickness (pachymetry). Confirms there’s enough tissue for a safe correction, and for an enhancement later if needed.
3. Stable, accurate refraction. Including a dilated or cycloplegic check in younger patients, so the laser treats your true prescription.
4. Tear film and dry eye assessment. Untreated dry eye is one of the most common reasons people are unhappy after LASIK.
5. Retina check. Especially if you’re short-sighted, since thin areas of retina should be found and treated first.
6. A clear talk about options. LASIK, SMILE, PRK, Contoura or ICL, and why one suits you better.
7. A written plan for follow-up and enhancement. Who sees you after surgery, how often, and what happens if you need a touch-up.
If you’d like a longer list, our guide to questions to ask before choosing a LASIK centre goes through them one by one.
Is a “permanent” LASIK result possible after 40?
LASIK can still give you excellent distance vision after 40, but you’ll likely need reading glasses for close work. Some people choose monovision, where one eye is set slightly for near. It suits some people and not others, so it’s usually tried with contact lenses first.
If reading glasses are your main problem in your mid-40s or later, lens-based options may make more sense than LASIK. Your surgeon should raise this with you.
How to protect your LASIK result for the long run
LASIK does its part on the day of surgery. The rest is in your hands, and a few habits make a real difference:
• Don’t rub your eyes, especially in the first few weeks. A LASIK flap heals well, but hard rubbing is the most common avoidable cause of flap problems.
• Treat dry eye early. Screens, air conditioning and Delhi’s winter air all dry the eye surface. Lubricating drops and good eyelid hygiene keep vision crisp.
• Wear sunglasses outdoors. UV protection is good for the cornea, lens and retina at every age.
• Keep your yearly eye check. LASIK fixes your prescription, not every eye condition. Glaucoma, retinal changes and cataract still need to be picked up early.
• Keep your surgery records. If you ever need cataract surgery decades later, your surgeon will want your pre-LASIK measurements for an accurate lens calculation.
Common myths about LASIK and permanence
| Myth | Reality |
| “LASIK wears off after a few years.” | The reshaping is permanent. Changes later are usually from ageing or, less often, a small regression. |
| “If I need readers at 45, the LASIK failed.” | Presbyopia happens to everyone after 40, with or without LASIK. |
| “LASIK stops me from having cataract surgery later.” | It doesn’t. Cataract surgery is done routinely in eyes that have had LASIK. |
| “Heavy screen use undoes LASIK.” | Screens don’t change the corneal shape, though they can make dry eye worse. |
Where to get LASIK assessed in Delhi NCR
At iClinix, every LASIK candidate goes through a full refractive work-up before any decision. That includes corneal topography and tomography, anterior segment OCT and a retina check. The refractive team offers femtosecond (bladeless) LASIK, Contoura Vision topography-guided treatment, SMILE, PRK and ICL, so the recommendation is based on your eyes rather than a single machine.
Assessments are done at iClinix centres in Lajpat Nagar, Paschim Vihar and Shakti Nagar in Delhi, and in Gurugram and Panipat. You can read more about LASIK and refractive surgery at iClinix or call +91 98991 18030.
Frequently asked questions
Is LASIK permanent?
The corneal reshaping done by LASIK is permanent. Your eyes still age, so you’ll probably need reading glasses after about 40, and a small number of people need a touch-up if their prescription drifts.
How long does LASIK last?
For most people with low to moderate prescriptions, distance vision stays stable for many years. Ten-year studies show the correction largely holds, with small changes more likely in high prescriptions.
Can short-sightedness come back after LASIK?
A small amount can return in some eyes, more often with high prescriptions or if the prescription wasn’t stable before surgery. This can often be corrected with an enhancement if the cornea is thick enough.
Will I need glasses after LASIK when I’m older?
Most people need reading glasses from their mid-40s because of presbyopia, a natural ageing change in the eye’s lens. LASIK doesn’t prevent it.
Can LASIK be done twice?
Yes, in many cases. An enhancement is possible if your cornea has enough thickness left and your eyes are otherwise healthy. Your surgeon will check this with corneal scans.
What is the best age for LASIK?
Usually between the early 20s and around 40, once the prescription has been stable for at least a year. After 40, your surgeon may discuss other options too.
Thinking about LASIK but not sure your eyes are right for it? Book a full LASIK screening at iClinix and get a straight answer before you decide.
This article is for general information and does not replace a personal eye examination.