Planning your trip
After SMILE, glare, halos and dryness usually settle within weeks, and final vision usually arrives within 1β3 months. Slower recovery or a small leftover prescription is rare, so plan your care at home before you fly.
Korea SMILE LASIK side effects long term: are you afraid the dry eye or night halos will follow you home, a long flight from the clinic?
Read this before you book the flight.
You'll know which effects usually fade and which can stay, what reviews get wrong, how the methods differ, what decides the cost, and how to plan your days and your care at home. That should tell you whether this trip fits your eyes and your budget.
Hello, I'm Dr. Hyun Chul Cheon, Representative Director at Bright Eye Clinic Gangnam in Seoul. I'm an ophthalmology specialist, certified in ICL and SMILE.
We have 3 VisuMax lasers on site, a ZEISS certificate for 100,000 SMILE procedures, and interpreters for international patients.
I wrote this because people tend to plan surgery day in detail and leave the following months to chance, and those months are when a slow side effect would show up.
After SMILE, glare, halos and dryness usually settle within weeks, and final vision usually arrives within 1β3 months. Slower recovery or a small leftover prescription is rare, so your care at home belongs in the trip plan.
If one effect is what's stopping you, send a photo of your latest prescription on WhatsApp and name that effect in your question, such as halos when you drive at night. You'll be asking about your own numbers and your own fear.
SMILE removes a small disc of tissue, called a lenticule, through a small incision in the cornea. Some corneal nerves are disturbed along the way, and that's the main reason eyes feel dry afterward. Dryness that outlasts the first weeks often follows that slower nerve timeline.
How far does the long-term evidence go? A ten-year study of SMILE for myopia up to -10 D was published in 2024, so the follow-up record now reaches a decade. I'd read long-term claims about either procedure with that in mind.
Two later changes get blamed on surgery. If vision drops afterward, the usual reasons are dry eye or myopic regression, a partial return of nearsightedness. Presbyopia is separate and arrives with age whether or not you've had surgery. Cataracts also come with age, and if that day comes you'll be looking at how lens choice shapes cataract surgery, a different decision from this one.
| Effect | Usual course after SMILE | When it needs a closer look |
|---|---|---|
| Slight blur | Day of surgery; most people see clearly from the next day | Blur that gets worse or doesn't lift |
| Glare and night halos | Typically improve within 1β2 weeks | Still there at your follow-up, or affecting your driving |
| Dry eye | Usually settles within a few weeks with artificial tears or prescribed medication | Vision that swings during the day, or ongoing irritation |
| Small leftover prescription | Rare; vision generally reaches its final level within 1β3 months | Blur that remains after that; enhancement may be considered |
| Corneal inflammation or opacity | Extremely rare; typically treatable with medication when found early | Pain, redness or a drop in vision: be seen promptly |
A high prescription needs more tissue removed, so a thin cornea leaves less behind. That remainder decides more than whether you qualify today. If you ever need an enhancement, the options rest on how much corneal tissue is left, and they may include LASEK or an ICL.
Say you're around -8.00, your optometrist has called your corneas thin, and you have two weeks of leave. I'd want to see your thickness, the amount of tissue that can be safely removed and the shape of your cornea before saying anything about SMILE. If the shape suggests early keratoconus, laser correction can make that condition worse, and this trip shouldn't be for a laser at all. If the tissue is the only limit, LASEK or an ICL may come into the conversation.
If you were told no at home, ask that doctor which measurement caused it, and write the answer down. A prescription alone doesn't explain a no. When two clinics disagree, the reason is usually in how they read the thickness, the map or the tissue left afterward, and those are things you can ask about directly.
Dr. Hyun Chul Cheon
Your trip starts at home, because contact lenses have to come out before your exam. Stop soft lenses at least 5 days before, rigid or toric lenses at least 2 weeks before, and Ortho-K lenses at least 1 month before. If you've worn toric lenses for years, count those two weeks back from your exam day and check them against your work calendar.
In Seoul, we see patients Monday, Tuesday, Thursday and Friday from 9:30 AM to 6:30 PM and Saturday from 8:30 AM to 5:00 PM, with lunch from 1:00 PM to 2:00 PM. We're closed on Wednesday and Sunday, so don't plan an exam for those days. On surgery day, skip makeup and perfume, and don't plan to drive. Bringing a companion is strongly encouraged.
The fixed point on your calendar is the follow-up check, typically within 1β2 weeks after SMILE. That's also when glare and dryness are usually improving, so it's the visit most worth attending. Before you book a return date, ask how that check fits your flight. The trip checklist for vision correction in Seoul covers the rest of the packing and booking.
Flying raises its own question. The CDC's medical tourism page suggests delaying air travel for 10β14 days after major surgeries because of blood clot risk. That advice is about major surgery in general, so it isn't a SMILE number; ask what applies to your flight. Cabin air is dry, so keep your artificial tears in your hand luggage.
In short, this is the part to arrange before you leave. The CDC advises making sure you can get follow-up care at home, and warns that treating complications there can be expensive and might not be covered by insurance. So do three things before you travel: find an ophthalmologist near home, ask your insurer what they'd cover after surgery abroad, and consider supplemental travel health insurance.
Get copies of your medical records before you fly back, including your pre-surgery measurements and the details of your procedure. A local doctor seeing your eyes for the first time needs those numbers to judge what has changed.
Dryness or mild halos in the first weeks can usually wait for your planned check. Pain, marked redness, sudden light sensitivity or a drop in vision should not wait, so see an eye doctor promptly. Serious problems are extremely rare, and they're typically treatable with medication when detected early, which is why that speed matters. After that, I strongly recommend a comprehensive eye exam every year, surgery or not, since the retina and optic nerve affect your vision too.
Once you have a rough return date, put it in a WhatsApp message with this question: which records should I take home for my eye doctor?
As general medicine, these are reasons to wait or look elsewhere: a prescription that's still changing, pregnancy or breastfeeding, an active eye infection or inflammation, untreated severe dry eye, and a thin or irregular cornea that may signal keratoconus. Some autoimmune conditions and medicines also need a careful talk first.
Whether SMILE fits you is decided after a comprehensive exam covering corneal thickness, safe tissue removal, endothelial cell health, eye anatomy, astigmatism and overall eye condition. I also weigh your lifestyle and visual needs. Recovery and results differ from person to person, and if you take heart medication or blood thinners such as aspirin, tell your doctor at consultation.
For long-term side effects, the question is what each method does to your cornea. If SMILE isn't suitable, LASEK or an ICL implant may be recommended. Our comparison of SMILE, LASIK and LASEK goes further into the laser options.
Our SMILE tiers add different things. Core and Triple SMILE strengthen the cornea, while Prime and Quattro SMILE replenish moisture. Your doctor recommends one after your exam.
| Method | How it treats the eye | What to weigh over time |
|---|---|---|
| SMILE | Lenticule removed through a small incision, no flap; laser time about 23β30 seconds per eye | Dryness and halos usually fade in weeks; thin corneas limit how much can be corrected |
| SMILE Pro | Same lenticule technique on the VisuMax 800; about 10 seconds per eye | Differs in the laser, so ask about the same long-term issues as SMILE |
| LASEK | Surface laser, no flap, on the Amaris Red | Often a slower, more uncomfortable early recovery; ask about corneal haze |
| ICL implant | Lens placed inside the eye, for eyes laser doesn't suit | Leaves the cornea uncut, but as eye surgery it can carry raised eye pressure or cataract risk |
Threads about Korea SMILE LASIK side effects long term tend to repeat three claims.
"SMILE can't cause dry eye." That's wrong. The small incision may disturb fewer nerves than a LASIK flap, and the 2014 review found some dry-eye measures favored SMILE, but dry eye still happens after SMILE.
"Halos at week two mean they're there for life." That's a poor conclusion to draw. Halos typically improve within 1β2 weeks, and vision can keep settling for up to 3 months. A review written in the second week describes the second week.
"My eyes got worse, so the surgery wore off." This one is partly true. Myopic regression exists, yet dry eye is the more common cause of a vision drop, and presbyopia has nothing to do with the surgery. The cause decides what you do next, so an exam tells you more than a thread can.
We don't publish a price list; quotes are given on request. These are the things that move your figure:
The factors behind LASIK cost are worth reading too if LASIK is also on your list. For your own figure, ask on WhatsApp what it would cost for your case, and mention the method you're considering.
One photo of your exam report is enough, and you can ask before booking anything. If you've been told your corneas are thin, send that report on WhatsApp with one question: how much tissue would be left after correction? When you come to Seoul, the doctor examines your eyes and recommends the procedure that fits them.
Results vary by individual, and your exam decides which procedure is proposed.
Cataract and presbyopia
For cataract surgery in Korea, the cost is shaped mainly by the lens implanted, whether one or both eyes are treated, extra measurements your eye history calls for, and your follow-up days.
Planning your trip
From the first message to the check-up afterwards: the steps, the contact lens rules and the airport route, in the order you will meet them.
Laser vision correction
Three laser options, three different trade-offs. A side-by-side look at method, recovery time and who each one tends to suit, using the clinic's own comparison.