What's the difference between monofocal and multifocal lenses for cataract surgery?

A monofocal lens typically corrects one focal distance clearly, often leaving reading glasses still needed afterward. A multifocal lens targets multiple distances but carries a higher reported likelihood of night glare or halos for some patients. Neither is universally the right choice — it depends on your visual priorities.

Is cataract surgery covered by insurance for foreign patients in Korea?

As a foreign patient, this and related surgical fees are typically billed as non-covered (비급여). Confirm the actual cost through a written, itemized quote rather than assuming any figure is insured or fixed.

Can both eyes be done on the same day for cataract surgery?

Usually not — eyes are typically staged with an interval between them rather than done in one session. Ask your clinic what interval it recommends and why, since practice can differ by clinic.

How soon after cataract surgery can I fly home?

That's a decision for your treating doctor to confirm at a follow-up check, not a fixed rule to assume in advance. Ask specifically about your case before booking a return flight.

What happens if my lens power doesn't match the target after surgery?

Ask before surgery what a lens exchange or additional correction would involve and cost if the achieved refractive outcome isn't what was targeted. This is a question worth a clear answer before you choose a lens, not after.

How much does cataract or lens-replacement surgery cost in Korea?

As rough per-eye planning figures as of July 2026, a monofocal lens commonly runs ₩800,000–₩2,000,000, and a multifocal or extended depth-of-focus lens roughly ₩2,500,000–₩5,500,000. Lens category drives that gap far more than surgical complexity — confirm your own number through a written, itemized quote naming which category it covers.

Medical

Cataract Surgery in Korea: Choosing Your Lens

Cataract and lens-replacement surgery in Korea comes down to which artificial lens you choose. Here is what the lens options trade off, and what to ask.

Last updated: Aug 16, 2026

Cataract Surgery in Korea: Choosing Your Lens

Quick answer

Cataract surgery removes the eye's clouded natural lens and replaces it with an artificial one; refractive lens exchange does the same electively for age-related near-vision loss, before a cataract has formed. Either way, which artificial lens you choose — monofocal, multifocal, or extended depth-of-focus — is usually what drives both the price and how your daily vision feels afterward.

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Two people can both say they're "getting cataract surgery" and be booking genuinely different procedures for different reasons — one because a lens has actually clouded over, the other electively, ahead of any cloudiness, to address age-related near-vision loss. What they'll have in common is the decision that matters most: which artificial lens goes in.

What this procedure actually is, and the two reasons people book it

In both cases, the eye's natural lens is removed and replaced with an artificial intraocular lens, or IOL. The first reason this happens is a cataract — a lens that has genuinely clouded and needs treating. The second is refractive lens exchange, done electively for presbyopia, the age-related loss of near-focus ability, before any cataract has formed at all. A consultation evaluates these two situations differently, even though the surgical mechanics converge on the same lens swap.

This page doesn't revisit the LASIK-versus-SMILE comparison — that's a different age group and a different procedure, covered in LASIK and SMILE in Korea instead.

Candidacy: what the pre-op exam looks at

A pre-op exam looks at how advanced a cataract is — or, for refractive lens exchange, whether one has even started forming yet — alongside coexisting conditions like retinal disease or glaucoma, and the general condition of the cornea. Retinal or glaucoma findings in particular can narrow which lens options are actually viable, not just how urgently surgery is needed.

Only that exam, done in person with the right imaging, determines candidacy and which lenses stay on the table for you. This section describes the categories a surgeon works through, not a way to self-assess before you've had that exam.

The real decision: monofocal, multifocal, or extended depth-of-focus lenses

This is the choice the rest of this article circles back to, because it shapes more than anything else here. A monofocal lens generally corrects clearly at one focal distance, which often means reading glasses are still needed afterward for close-up tasks. A multifocal lens targets multiple distances at once, but carries a higher reported likelihood of night-time glare or halos for some patients. An extended depth-of-focus lens sits between the two, trading some of each.

None of these is the objectively correct pick — the right one depends on your own visual priorities and eye condition, worked through with your surgeon. Understand this trade-off clearly before the conversation moves to price, because the lens category you land on is what the next section's cost variation is actually about.

Why lens choice is the main cost variable, and why it's non-covered for foreign patients

Lens type is usually the biggest single reason two quotes for what looks like the same surgery come back with different totals — more than surgical complexity, more than which clinic you're comparing. As a foreign patient, this procedure and its related surgical fees are typically billed as non-covered (비급여), meaning national insurance categories that might apply to a domestic patient generally don't apply the same way to you.

As of July 2026, a monofocal lens typically runs roughly ₩800,000–₩2,000,000 per eye in Korea, while a multifocal or extended depth-of-focus lens runs well above that, in the neighborhood of ₩2,500,000–₩5,500,000 per eye. The lens category from the section above accounts for most of that gap — not how technically demanding your particular surgery turns out to be. Both figures are per-eye planning ranges only, not a personal quote; ask the clinic which lens category its written, itemized quote actually prices, and how long that quote stays valid before you rely on it. For a look at what a specific clinic has itself declared for this procedure, HIRA's non-covered (비급여) treatment cost information portal is listed in the sources below.

Surgery day: anesthesia, timing, and doing both eyes

Local or topical anesthesia is the typical approach, surgery duration per eye is best treated as a general range rather than a fixed figure, and same-day discharge is the usual pattern rather than an overnight stay. Both eyes are typically staged with an interval between them instead of being done in the same session — ask your clinic what interval it recommends and why, since the reasoning and the gap length can differ by clinic.

Arrange a companion or transport in advance for surgery day; your vision won't be reliable enough right afterward to get yourself home on your own.

Recovery: glare, dryness, and why the timeline isn't the same for everyone

Glare, dryness, and how quickly vision settles after surgery differ by patient and by which lens category was chosen — put the specifics of your own case to your treating doctor rather than expecting one fixed answer to cover everyone. Adjustment to a multifocal lens in particular tends to have a wider individual range, especially around night driving, than adjustment to a monofocal lens does.

Flying home is a decision for your doctor to confirm at a follow-up check, not a date you pencil in based on the surgery day alone. For how this compares against other eye procedures' stay lengths, how many days to stay in Korea covers that separately rather than repeating it here.

Questions to ask before you choose a lens

Get the manufacturer and model named for every lens option under discussion, not just the one you end up choosing. Ask directly what happens if the achieved refractive outcome doesn't land on target — what a lens exchange or additional correction would actually involve and cost, since this is far easier to negotiate before surgery than after. Confirm the surgeon performing the surgery is the same person who ran your pre-op consultation, and ask exactly what's bundled into the quoted price: pre-op testing, the lens itself, post-op medication, and follow-up visits.

Answers to these four questions, gathered before you commit to a lens, do more to protect you than anything you could ask after the fact.

Handing off to your eye doctor back home

Before you leave the clinic, ask for the lens model, its power, and manufacturer documentation in English. This isn't paperwork for its own sake — it's the only way an eye doctor back home can make sense of what's actually inside your eye if you ever need a future check or run into a complication.

Request it while you're still on-site rather than emailing after you've flown out; a clinic can usually hand this over on the day far more easily than it can track it down for you weeks later. This page is one of KMediBook's procedure guides — if corneal thickness rather than a clouded or aging lens is the reason you're researching vision correction, ICL lens implant surgery covers that different mechanism instead.

Sources

Once your lens choice and documentation plan are settled, aftercare once you're home covers what happens after you've left Korea. Reviewed 28 July 2026.

Frequently asked questions

What's the difference between monofocal and multifocal lenses for cataract surgery?: A monofocal lens typically corrects one focal distance clearly, often leaving reading glasses still needed afterward. A multifocal lens targets multiple distances but carries a higher reported likelihood of night glare or halos for some patients. Neither is universally the right choice — it depends on your visual priorities.
Is cataract surgery covered by insurance for foreign patients in Korea?: As a foreign patient, this and related surgical fees are typically billed as non-covered (비급여). Confirm the actual cost through a written, itemized quote rather than assuming any figure is insured or fixed.
Can both eyes be done on the same day for cataract surgery?: Usually not — eyes are typically staged with an interval between them rather than done in one session. Ask your clinic what interval it recommends and why, since practice can differ by clinic.
How soon after cataract surgery can I fly home?: That's a decision for your treating doctor to confirm at a follow-up check, not a fixed rule to assume in advance. Ask specifically about your case before booking a return flight.
What happens if my lens power doesn't match the target after surgery?: Ask before surgery what a lens exchange or additional correction would involve and cost if the achieved refractive outcome isn't what was targeted. This is a question worth a clear answer before you choose a lens, not after.
How much does cataract or lens-replacement surgery cost in Korea?: As rough per-eye planning figures as of July 2026, a monofocal lens commonly runs ₩800,000–₩2,000,000, and a multifocal or extended depth-of-focus lens roughly ₩2,500,000–₩5,500,000. Lens category drives that gap far more than surgical complexity — confirm your own number through a written, itemized quote naming which category it covers.