Is LASEK Permanent? What Stays Changed and What Can Shift

Is LASEK permanent? The change the laser makes to your cornea is: tissue that is removed does not grow back. What isn't fixed in place is the rest of your eye, which keeps aging after surgery just as it did before, and that is where the honest part of this answer lives.

I'm Dr. Kim Sun-young, Medical Director of Healing Eye Clinic in Gangnam, Seoul, and a former clinical professor of cornea and cataract at Uijeongbu St. Mary's Hospital. Our clinic also runs a LASIK and LASEK revision center, so revision cases are part of what our clinic handles, not only the day of surgery.

Put simply, the question is: "Will my eyes go back to how they were?" If you're asking that before committing to LASEK, you're asking the right question. A few days of discomfort is something you can plan for. What you really want to know is whether it will still be worth it at forty-five.

So here is my promise for this page. I'll separate what LASEK changes for good from what your eyes will keep doing anyway, because mixing the two is where most of the worry comes from.

Is LASEK permanent? What the laser changes for good

LASEK is a surface treatment. The thin outer skin of the cornea, the epithelium, is moved aside, and an excimer laser reshapes the surface underneath to correct your prescription. A soft bandage lens then protects the eye while the epithelium grows back over the next few days.

That regrowth is what confuses people. The epithelium heals because it is meant to renew itself. The reshaped layer beneath it does not regrow, and that is why the correction itself is lasting. The new curvature is the new shape of your cornea.

If you've read whether LASIK lasts forever, the logic is the same for LASEK. The difference is only in how the cornea is reached: LASEK has no flap, so the healing happens on the surface instead.

Four things that can still change after LASEK

None of these means the surgery "wore off". They are the ways an eye keeps living after the laser is finished.

1. The first months are healing, not the final result

For the first days, vision is blurry under the bandage lens, and the first three to five days are usually the most uncomfortable. Vision becomes clearer over the first week, settles between two weeks and a month, and reaches its final stable phase between one and three months.

So a result at week two is not yet your result. Patients sometimes worry that something has gone wrong when it is simply early. The LASEK recovery timeline shows what is normal at each stage.

One part of healing needs extra care: haze, a faint cloudiness that can form as the surface heals. When the risk is higher, such as with high myopia or a larger amount of tissue removed, I use mitomycin C selectively during surgery to lower it. I don't use it for everyone.

2. Regression: a small drift back in some eyes

Some people see their prescription creep back slightly in the months or years after surgery. This is called regression. It is more likely after larger corrections, because the cornea responds more to a deeper treatment.

Think of it like a garden path pressed into the lawn: the shape stays, but grass grows back at the edges. Regression is usually partial, not a return to where you started. If it happens, whether a further treatment is possible depends on how much cornea remains. LASIK enhancement and regression explains how that decision is made.

3. Presbyopia arrives on its own schedule

From the early to mid-forties, almost everyone starts holding their phone farther away to read it. This is presbyopia, an age-related stiffening of the lens inside the eye.

LASEK corrects the cornea, and presbyopia happens in the lens behind it. Needing readers at forty-six is not LASEK failing. If you're already near that age, it is worth talking about before surgery, because how I set your distance correction can affect how soon readers become part of your life.

4. The eye you have at sixty is not the eye you have today

Later in life, the natural lens can cloud into a cataract, whether or not you ever had laser surgery. LASEK does not cause it and does not prevent it.

What matters is that the eye doctor who treats you then knows what was done to your cornea. That is why I give every patient a written record to keep, with the numbers that future surgeon will need.

Why I plan your LASEK for the eye you'll have in twenty years

I would rather leave a little more cornea behind than chase the last fraction of a diopter today. A cornea with room to spare is one that can still be treated if regression happens, and one that is easier for any eye doctor to work with later.

Because "permanent" is really a question about who stands behind the result, this is what stands behind ours. I mention it so you can check it, not to impress you. Surgery here comes with a lifetime surgical responsibility guarantee, and the revision center is where eyes that drift are reassessed. Korea's Ministry of Health and Welfare registration covers our care of international patients, the Google rating sits at 4.8 over 154 reviews, and I'm a full member of the European Society of Cataract and Refractive Surgeons (ESCRS). For Korean readers, our LASEK page covers the same procedure in Korean.

So will my LASEK result hold?

No one can see the future of your eye, but the exam tells me a great deal about how stable a result is likely to be. These are the factors I weigh.

If your numbers point elsewhere, I'll say so. Premium LASEK is one of several options, and who LASEK in Korea really suits covers when I recommend it and when I don't.

These are our published prices for both eyes. The full list is on our price page.

The Premium package adds corneal cross-linking, autologous serum and SCOUT to the basic surgery. The exam is charged separately.

What can go wrong on the way to a lasting result, and when I'd hold off

LASEK leaves no flap, but it is still surgery on the cornea, and a lasting result includes knowing what can go wrong along the way.

• Discomfort in the first three to five days: stinging, watering and light sensitivity under the bandage lens.
• Dryness for weeks to months, especially in airplane cabins and on long screen days.
• Glare or halos at night while the surface settles.
• Haze in some eyes as the surface heals, which is why higher-risk eyes receive mitomycin C.
• Regression or under- and over-correction, sometimes needing further treatment.

How these play out differs from person to person. For a result meant to last decades, timing matters: if your prescription moved in the past year, I'd rather wait until it holds still, pregnancy and breastfeeding are times to postpone, and severe dry eye should be treated first. If your cornea is too thin even for LASEK, I'll talk with you about an implantable lens instead.

Protecting the result: the stay, the check-ups and the first months

• Stay: three nights and four days. Exam and surgery on day one, a visit three days later to decide whether the bandage lens can come out, then the flight home.
• Check-ups: three days, one week, one month and three months after surgery. The first is in Seoul; the rest can be with your eye doctor at home, using the written record we give you.
• Medication: you leave with enough prescription drops, and we explain the ingredients so a pharmacy at home can find an equivalent.
• Sun and healing: vitamin C, 1,000 mg a day for three months, and UV-blocking sunglasses outdoors for six months.
• Daily life: washing your face from day three; light jogging from one week; saunas and hair dyeing after a month; swimming and contact sports after two months.
• Before the exam: stop soft contact lenses one week and hard lenses three weeks ahead.

What actually makes a LASEK result last

A lasting LASEK result starts long before surgery day. It starts with a stable prescription, a cornea with room to spare and a surgeon who tells you what your eyes will keep doing on their own.

Send me your current prescription and, if you have them, your prescriptions from the last year or two on WhatsApp; the consultation is free. Stability and suitability are confirmed at the full exam, and if your eyes aren't ready, we'll tell you directly.

Bring those older prescriptions to the exam too; laid side by side, they show whether your eyes are ready to hold a result for the years ahead.

— Dr. Kim Sun-young, Medical Director, Healing Eye Clinic (Sinnonhyeon, Gangnam, Seoul)