Does cataract surgery hurt? Where it can, and when to wait

What worries many people flying in from abroad is the first night afterwards in a Seoul hotel room, when they can't tell whether a gritty, sore eye is normal or a reason to call someone. Knowing in advance which sensations are normal at each stage of cataract surgery is what makes that night manageable. The clinic has Japanese, Traditional Chinese and English interpreters on site, and that matters for pain more than it sounds.

Kim Sun-young here, Medical Director of Healing Eye Clinic in Gangnam; cornea, glaucoma and cataract are the areas I specialize in.

One surgeon also owns your case from exam to surgery to aftercare, so the person you describe a sensation to already knows your eye.

If you have something that makes you worry about pain, such as dry eye, glaucoma or a past eye operation, send a photo of your latest eye exam report on WhatsApp with one line about what you're dreading most.

Before the day: what shapes how it feels

Anxiety, a dry or inflamed eye surface, and how well you can lie still shape the experience more than the operation itself. Each is worth raising before surgery day, because each has a practical fix or is a reason to adjust the plan.

The myth here is that a low pain threshold rules you out. Numbing drops work on the nerves at the surface of the eye whatever your tolerance, so a person who faints at blood tests usually feels the same pressure as anyone else. The part that's true is that fear amplifies everything. MedlinePlus notes that you may be given medicine to help you relax, so if you're very anxious, say so at the consultation instead of on the operating table.

A dry, irritated eye surface is the other quiet factor. It makes the scratchy feeling after surgery more noticeable, and it can distort the measurements used to choose the lens power. The clinic runs a Dry-Eye Clinic, and calming the surface first is sometimes the more sensible order of things.

Then there's lying still. Back pain, a persistent cough, a tremor or a fear of having your face covered by a drape all matter for a 15 to 20 minute operation. None of them is unusual, and all of them are easier to plan around when the team knows in advance.

Will you feel the lens going in?

Usually not as pain. The numbing covers the surface of the eye, the cloudy natural lens has no nerves of its own, and the steps register as pressure, a light touch or nothing at all.

The myth is that you'll feel the cut. According to the American Academy of Ophthalmology, the surgeon makes a small incision, breaks up and removes the clouded lens, and places a clear artificial lens in its place. Patients tend to notice the clip that holds the eyelids open, a cool rinse of fluid across the eye, and sometimes a sense of pushing.

The kernel of truth: some moments can ache briefly, and the antiseptic used to clean the eye can sting. That's why the table above has a right-hand column.

Being awake for it: what you see and hear

You're awake, you can talk, and you won't see the instruments. Most people describe a bright light, moving colours or soft shapes, and the sound of the machine and of the surgeon speaking to the team.

The myth is that being awake means watching everything happen. The microscope light is too bright and too close for the operated eye to focus on anything, which surprises people who expected to see detail. The other eye is usually covered. If you need to cough, sneeze or adjust your back, the instruction is the same everywhere: say it out loud first, keep your head still, and wait for the surgeon to pause.

How sore is the first night, and which risks show up as pain?

Mildly sore, for most people: a gritty, scratchy feeling, some watering and an ache that ordinary pain relief tends to settle. The National Eye Institute describes itching and mild discomfort as normal for a few days. Pain that keeps getting worse, especially with falling vision or spreading redness, is not normal and needs an eye doctor that day.

The myth worth taking apart is that if surgery didn't hurt, nothing can go wrong. Pain afterwards is one of the main ways a problem announces itself. MedlinePlus and the AAO describe complications that are uncommon but real: infection inside the eye, inflammation, a rise in eye pressure, swelling of the cornea or retina, bleeding, and retinal detachment. Clouding of the capsule behind the new lens can also develop months or years later, which shows up as blur rather than pain.

A second myth is that pain a few days in is just part of healing. Mild discomfort is; a steady climb is a warning. How sore the first days feel differs from person to person, so judge by direction: improving each day is reassuring, getting worse is the signal.

If you're weighing the trip, write down the one sensation you're most afraid of and send it on WhatsApp with your planned travel dates.

When would I ask you to wait?

When the eye or the body isn't ready yet: an active infection or inflamed eyelids, a general health condition that isn't under control, or a cataract that isn't yet affecting daily life. Waiting in those cases protects against infection and gives more accurate lens measurements.

An eyelid infection or conjunctivitis raises the risk of infection inside the eye, so it's treated first. Diabetes or blood pressure that isn't well controlled can affect the retina and healing, and that's a conversation with your own doctor before you book flights. A very dry eye surface can throw off the lens calculation, as described above.

There's also a limit to set expectations: cataract surgery replaces a cloudy lens, and it can't restore vision lost to other conditions such as macular or optic nerve disease. If those are present, the operation may still help, but the result has a ceiling. Whether any of this applies to you is decided at the in-person exam in Seoul. For how mild cataracts are weighed against the benefit of operating now, see how a surgeon decides cataract timing.

The trip itself can be a reason to wait. If your leave doesn't cover the check-ups after surgery, it's better to change the dates than to skip a visit, and our day-by-day piece on how long to stay in Korea for cataract surgery helps with that calculation.

Is the second eye different?

Many people say the second eye feels a little more noticeable, even though the operation is the same.

Knowing this in advance helps: a more noticeable second eye is not a sign that something went wrong. Whether both eyes are done on one trip or on separate visits is its own decision, covered in one eye or both on a Seoul trip.

The days around surgery in Seoul

The clinic is at 470 Gangnam-daero, one minute's walk from Sinnonhyeon Station, open Monday to Thursday 10:00 to 18:30, Friday until 21:00 and Saturday 10:00 to 14:00, with lunch from 13:00 to 14:00. It's closed on Sundays and public holidays, so if something worries you then, a local hospital emergency department is the place to go.

The clinic's partner hotel is the O'Cloud Hotel in Seocho-gu. Pack lubricating drops your surgeon approves, sunglasses for the bright first days, and any regular medicines with their names written down. If a family member is travelling with you, our companion's guide to cataract surgery in Korea for parents covers what they can do in those hotel days. If that relative reads Korean, the clinic's Korean page on lens implant choices lets them follow the lens part of the conversation. For how comfort usually changes over the following weeks, see the realistic cataract recovery timeline, and for the full plan from first message to flight home, read cataract surgery in Korea, step by step.

If you're still deciding whether to come at all, take a photo of the prescription for your current glasses and send it on WhatsApp with the month you have in mind.