Seoul cataract surgery center myths, checked by a surgeon

Choosing a Seoul cataract surgery center comes down less to the 15-to-20-minute operation than to what surrounds it: the measurements that pick your lens, and the follow-up once you've flown home. At Healing Eye Clinic, one dedicated surgeon takes your cataract surgery from the first exam through the operation and the aftercare. A handful of beliefs travel with people planning this trip from abroad.

I'm Kim Sun-young, Medical Director of Healing Eye Clinic in Gangnam, and my specialty is cornea, glaucoma and cataract.

Each one is partly true, which is why they stick. Some can cost you a wasted flight; others only cost you sleep.

If you had LASIK, LASEK or PRK at some point, dig out any record of your prescription from before that surgery and send a photo of it on WhatsApp, with the one question that worries you most. Those old numbers get harder to find every year, and having them in hand now spares you a search through old emails and clinic portals later.

Is a 15-to-20-minute operation a short trip?

The trip is longer, because the measurements that choose your lens come first and the eye needs checking after surgery. How many days depends on your exam and on one eye or both, so confirm it at your consultation before booking a return flight.

Before any cataract operation, the eye is measured: its length from front to back, the curve of the cornea, and the depth of the space where the new lens will sit. Those numbers go into a formula that picks the lens power.

Daily life usually returns within days, and vision keeps settling gradually after that.

Two things shape most calendars: whether you do one eye or both on this trip, and how quickly the first eye settles. For a sense of the first days themselves, see what vision usually does right after cataract surgery.

Our hours matter if you're fitting this around a weekend: Monday to Thursday 10:00 to 18:30, Friday until 21:00, Saturday 10:00 to 14:00, with lunch from 13:00 to 14:00, and closed on Sundays and public holidays.

Does LASIK years ago rule out cataract surgery?

No. Having had LASIK, LASEK or PRK doesn't take cataract surgery off the table. What it changes is the lens calculation: the laser reshaped the front of your cornea, and the standard formulas that pick lens power were built around corneas no laser has touched.

After laser correction for nearsightedness, the center of the cornea is flatter than it used to be. Standard measurements can misread how much focusing power that flatter cornea has, and if the formula takes the reading at face value, the lens chosen can leave you a little farsighted. Surgeons call this a refractive surprise, and avoiding it is most of the extra work with a post-laser eye.

There are calculation methods designed for eyes that have had laser surgery, and your pre-LASIK prescription, if you still have it, is one of the inputs some of them use. Corneal topography matters too: a map of the whole cornea shows whether the earlier treatment was centered and how even the surface is. For an eye like this, that map and those old numbers tell me more about the lens decision than the cataract itself does.

We also run a dedicated LASIK/LASEK revision center at Healing Eye Clinic, so reading corneas that have already had laser surgery is part of the work we do.

Is a multifocal lens the upgrade everyone should take?

No. A multifocal lens can cut down how often you reach for reading glasses, and during cataract surgery it can correct presbyopia and, in its toric versions, astigmatism in the same step. It also asks something back, and some eyes are poor candidates for it.

A monofocal lens focuses at one distance, usually far, so reading glasses stay in your life. A multifocal lens splits incoming light between distances. That split is why the American Academy of Ophthalmology notes that people with multifocal lenses may notice glare or halos around lights at night, and why contrast in dim light can feel a little lower.

Whether that trade is worth it depends on your eyes as much as your wishes. A cornea left irregular by earlier laser surgery, macular disease, or glaucoma that has already affected the optic nerve can each make a multifocal lens a weaker choice, because the eye has less optical margin to share between distances.

If a monofocal lens fits your eyes and your days better, that's what I'll suggest. Not pushing more than you need is a principle here, and it applies to lenses as much as to surgery. How the lens choice fits into the rest of the plan is covered in my guide to cataract surgery in Korea.

What can go wrong, during the trip and after you're home

Cataract surgery is a very common operation, but it is still surgery inside the eye. The risks are worth knowing by name, along with the warning signs that mean you should be seen quickly, wherever you are.

Risks and side effects to know

In the first days, a gritty feeling, mild redness, watering and sensitivity to light are common and usually fade. Vision can be a little hazy at first while the cornea clears.

Less often, eye pressure rises after surgery, inflammation lingers, or swelling develops at the center of the retina (the macula) and blurs vision a few weeks in. These are usually treatable with drops, which is one reason the early checks matter. With glaucoma, one of my specialties, a pressure rise matters more, because an optic nerve that's already damaged has less room to tolerate it.

Rare but serious problems include infection inside the eye and retinal detachment. Long, very nearsighted eyes carry a higher baseline risk of retinal detachment, and that stays true after cataract surgery. The National Eye Institute lists these among the risks of the operation. See an eye doctor the same day, at home or abroad, if pain gets worse, vision drops suddenly, a shower of new floaters or flashes appears, or a shadow spreads across part of your view.

The most common later problem is posterior capsule opacification. Months or years after surgery, the thin membrane holding the new lens can turn cloudy, and vision dims as if the cataract had come back.

That's why the trip home deserves planning. The CDC's guidance on medical tourism is to arrange follow-up care at home before you travel and to bring copies of your records back with you. I'd add one step: tell your home ophthalmologist your plan before you go, so your first visit after landing isn't with someone meeting your eye cold. You can see how that 1:1 system is described on our English homepage.

Do you have to wait for a cataract to ripen?

No. That idea dates from older techniques that worked better on a hard, mature lens. The National Eye Institute and the American Academy of Ophthalmology both frame timing around daily life: surgery makes sense when the cataract gets in the way of reading, driving or work enough that you want it fixed.

Waiting a very long time has its own cost, because a dense lens can make the operation more demanding. If you're arranging this for a mother or father, the companion's guide to cataract surgery for parents covers the trip from the side of the person in the waiting room.

Picking a center when your eyes have a history

If your eyes have a history, such as earlier laser surgery, high myopia or glaucoma, the questions for any Seoul cataract surgery center are about people. Ask who examines you, who operates, and who you contact if something changes after you're home.

Here, those answers come from how the clinic is set up. One dedicated surgeon covers exam, surgery and aftercare. Healing Eye Clinic is registered with Korea's Ministry of Health and Welfare as a medical institution for international patients. We're at 470 Gangnam-daero, one minute's walk from Sinnonhyeon Station, and our partner hotel is O'Cloud Hotel in Seocho-gu.

When you know which weeks you could travel, send them on WhatsApp together with a photo of your home eye doctor's latest report on the cataract, and ask the question you'd want answered before booking anything. That report is a document you'll want with you in Seoul anyway.