Is cataract surgery safe? Eye checks first, flights second

Is cataract surgery safe? For most eyes, yes: the National Eye Institute describes cataract surgery as common, safe and effective, and reports that about 9 out of 10 people see better afterward. The belief that it's a minor operation is the part to correct, especially if you're arranging it in Seoul for a parent, because a safe average still includes a few real complications, and the one families worry about is a problem that shows up after the flight home.

I'm Kim Sun-young, Medical Director of Healing Eye Clinic in Gangnam and a former Clinical Professor (Cornea & Cataract) at Uijeongbu St. Mary's Hospital.

A few facts shape how that risk is handled here. One dedicated surgeon owns each patient's care from the exam through surgery and aftercare, and consultations run with Japanese, Traditional Chinese and English interpreters, so a parent hears the risks in a language they can follow before agreeing to anything. Healing Eye is also registered with Korea's Ministry of Health and Welfare as an institution for international patients.

Start with the one question that's bothering you most.

The common part: what the first days feel like

An itchy or uncomfortable eye, sensitivity to light and touch, and blurry vision are expected in the first days and belong to normal healing. The National Eye Institute says discomfort should ease after 1 or 2 days and that most people are completely healed 8 weeks after surgery.

The operation itself takes about 15 to 20 minutes per eye at Healing Eye, and daily life usually resumes within days while vision keeps settling gradually. Some people notice colors look brighter, because the clear artificial lens no longer filters light through the yellow-brown tint of the old cataract. Once the eye has healed, a new glasses prescription is often needed, especially for reading with a monofocal lens.

For the first few weeks, the NEI advises against touching the eye, bending over and lifting heavy objects. For a parent staying in a hotel, that means someone else carries the suitcase. The day-by-day version is in this realistic recovery timeline.

Is a hazy film months later a sign the surgery failed?

Usually not. A secondary cataract, or posterior capsule opacity, is clouding of the thin membrane that holds the new lens in place. The NEI notes it can appear weeks, months or even years after surgery and that eye doctors can fix it with laser treatment.

The artificial lens doesn't turn cloudy itself. The capsule behind it can, and the symptoms (glare, a gradual return of haze) look a lot like the original cataract, which is why people panic. The laser treatment is a short outpatient procedure that an ophthalmologist at home can usually perform, so knowing your parent's lens details makes that later visit simpler.

Which complications are uncommon but serious?

Infection, bleeding or swelling, unusual changes in eye pressure, retinal detachment, and vision loss or double vision are the serious items on the NEI's list. They're uncommon, and the NEI's point is that eye doctors can treat them, but treatment should start as soon as possible.

Swelling at the center of the retina and pressure spikes are the two items families have usually never heard of. Either can blur vision a few weeks in, and both tend to respond to treatment when caught early, which is the whole argument for keeping follow-up appointments even when the eye feels fine. A longer walk through each one is in cataract surgery risks and complications.

Which eyes carry more risk going in?

Eyes with something else going on: glaucoma, diabetic eye disease, a weak inner layer of the cornea, an old injury or eye surgery, a very dense cataract, or pupils that don't widen well. None of these automatically rules surgery out; each changes the plan, the lens choice or the timing.

Before cataract surgery, eye surgeons generally measure the eye's length and corneal curvature to choose the lens power, check the pressure, examine the retina through dilated pupils and assess the cornea's inner cell layer. In an eye with glaucoma, one of my specialties alongside cornea and cataract, the pressure history and the state of the optic nerve weigh heavily on timing and lens choice.

A parent who had LASIK decades ago can still have cataract surgery, but the lens calculation is less predictable, so any old refractive surgery records are worth finding. General health counts too: blood thinners, diabetes control and whether your parent can lie fairly still for 15 to 20 minutes all belong in the conversation with the surgeon.

When is waiting the safer choice?

Surgery is usually better postponed while blood sugar or blood pressure is poorly controlled, while the eye has an active infection or inflammation, or when the cataract isn't yet getting in the way of daily life. The NEI notes that early on, new glasses and brighter lighting may be enough.

Timing is its own decision, and how a surgeon decides when to operate goes through it. There's also a travel-specific reason to wait: if no one can stay with your parent for the first days, or no eye doctor at home has agreed to see them afterward, the trip isn't ready yet even when the eye is.

How the lens choice changes the risk picture

The operation is the same; the lens changes the trade-offs. A monofocal lens gives clear vision at one distance and usually means glasses for reading. Multifocal lenses can reduce reliance on glasses, but the American Academy of Ophthalmology notes they can bring more glare or halos around lights.

That night-time effect matters more for a parent who still drives after dark, and eyes with macular disease or advanced glaucoma are generally steered toward simpler lenses. At Healing Eye, premium multifocal lenses can correct presbyopia during cataract surgery, which appeals when someone flies in once, yet the lens has to suit the eye first. If a relative at home reads Korean, the clinic's Korean page on premium artificial lenses lets them follow the options in their own language. For the wider planning picture, see a Seoul surgeon's guide to cataract surgery in Korea.

What does follow-up look like once your parent is home?

Plan the checks in Seoul before the flight, and line up an ophthalmologist at home before you leave. The U.S. Centers for Disease Control and Prevention's medical tourism advice makes the same point: get copies of medical records and arrange follow-up care.

For the folder: the operative report, the lens model and power for each eye, the drop schedule, and the pre-op measurements. Doing one eye or both on the trip changes the length of stay; one eye or both, and how long to stay lays out the options, and a day-by-day stay plan helps with booking. The exact number of nights is confirmed in consultation.

The clinic is one minute's walk from Sinnonhyeon Station. It's open Monday to Thursday 10:00 to 18:30, Friday until 21:00 and Saturday 10:00 to 14:00, and closed Sundays and public holidays, which matters if a post-op check would fall on one. The partner hotel is O'Cloud Hotel in Seocho-gu.

After surgery, patients have lifelong check-ups under the clinic's lifetime responsibility policy, and the companion's guide for adult children covers the days around surgery from your side.

If the trip home is the part that worries you, send the dates you're considering and the city your parent will fly back to on WhatsApp. We'll reply in English, so you can line up the Seoul checks and the hand-off to a home eye doctor before buying tickets.

What to have ready before the first message

Four things make that first exchange useful: your parent's medication list, any previous eye surgery or injury, the latest eye report from home, and which eye bothers them more.

Put them in one phone photo if you can, add your one question, and send it on WhatsApp. We'll answer in English, and you'll walk into the exam with the papers the surgeon will ask for.