EYEONCE is a Gangnam vision-correction specialist for international patients — from Korea, the US and the Middle East. SMILE PRO, SMILE LASIK, ICL and cataract care — with English-speaking staff and same-day surgery.
We focus on one thing — restoring clear, confident vision — and we handle the exam, surgery and travel logistics in one visit for patients travelling to Seoul.
Your consultation, surgery and follow-up are all handled personally by the operating surgeon — never passed off.
Precision pre-op mapping on our Ziemer and diagnostic systems determines the right procedure for your eyes.
Interpreters live in-house — English, Chinese, Mongolian and Thai — so there's zero language barrier from your first WhatsApp message to your final check-up.
Suitable candidates can complete the exam and surgery on the same trip — designed around your travel schedule.
From flagship flapless laser to lens implants and cataract care — every procedure is matched to your eyes, not a template.
Our most advanced flapless, bladeless laser, built on the Ziemer FEMTO Z8.
Learn more →
A tiny keyhole incision, no corneal flap — a stronger, drier-eye-friendly result.
Learn more →
One platform, two laser options — matched to your corneal thickness and prescription.
Learn more →
Correction without removing corneal tissue — for high myopia and thin corneas.
Learn more →
The clouded lens replaced with a premium IOL — many patients see more clearly than they did with glasses.
Learn more →
Multifocal lens correction for near, intermediate and far vision.
Learn more →SMILE laser eye surgery costs $4,000–$6,500 per eye in the US, UK and Australia — often with long waitlists. In Seoul, you get the same FEMTO Z8 SMILE technology at a fraction of the price, and you can book and complete it on a single trip.
EYEONCE's representative director answers the questions patients ask most — in his own words, from the exam room.
International patients share what actually happened — from their first fears to waking up the next morning without glasses.
Our patients post these themselves. Open the map below and read them.
Had my Supra Clear X done here at Eyeonce. Great service, from front counter, examination, to surgery. Came it at 10am, done by 3pm. 1 on 1 interpretation service from the staff, and the optometrists and nurses were extremely professional as well. Thank you Doctor Park, looking forward to my clear vision. Recommend!
SMILE PRO View on Google →I had a really good experience at Eyeonce Clinic. From the beginning, I appreciated that they never pressured me into purchasing or getting any specific treatments. Instead, they were very thorough and made sure to perform all of the necessary tests and examinations before making any recommendations. I originally went to the clinic because I was looking for treatment for dry eyes, but during my examination, they identified more pressing concerns, including retinal tears. I really appreciated that they took the time to look beyond the issue I originally came in for and made sure I was aware of what needed immediate attention. I felt like they genuinely prioritized my eye health rather than simply trying to sell me a treatment. Another thing I appreciated was the affordability. They were very helpful in explaining my options and finding treatments and care that were reasonable for me financially. The clinic also had translators available, which made a huge difference. They helped make sure I understood what was happening, what the doctors were explaining, and what to expect throughout the process. That made me feel much more comfortable and confident in the care I was receiving.
View on Google →I was at this clinic last week doing a complete check-up of my sight and loved the experience, latest generation machines, personalized attention and even had a translator all the time with me, very friendly with the foreign country and excellent service
View on Google →I came for a detailed eye examination, and the whole process was very professional and well organized. The staff were kind, and the doctors explained my results clearly. I also liked that they used advanced equipment to check different parts of my eyes. Overall, I had a comfortable and informative experience, and I'm glad I decided to get my eyes checked.
View on Google →Received CLEAR SMILE PRO eye surgery and had a wonderful experience! They were very helpful and informative prior, during, and post surgery. Ye Ji was the BEST and always willing to help! Very grateful for their consideration and had a great experience! 10/10 ❤️
SMILE PRO View on Google →Dr. Paik and the staff were incredibly nice and welcoming. I came in for a Pro SMILE LASIK consultation and they answered all of my questions thoroughly. I feel so much more at ease about my upcoming procedure. Would highly recommend to anyone considering getting LASIK!
SMILE LASIK View on Google →The clinic was clean and well organized. The staff were professional and friendly. I visited for dry eye treatment and noticed a clear improvement in my symptoms. The Chinese translator was very helpful and made communication easy throughout the visit. Overall, a very positive experience.
Dry Eye Treatment View on Google →I was recommended this clinic by coworkers because its detailed and smooth process. I had perfect vision the next day. The doctor and english translator was able to talk me through the process and the staff is very efficient and thorough. Excellent clinic to go to, I highly recommend.
View on Google →This clinic was clean and the workers were very helpful. They took several tests and offered great service. Would recommend!
View on Google →Came here with my husband to help translate. Everyone here was so kind and helpful and whenever we asked a question we got a very detailed answer. We came in here to get lasik but decided to go with SMILE lasik instead and couldnt be happier with this decision!
SMILE LASIK View on Google →I visited this clinic after searching around and reading reviews. Now I'm adding on to them. So, I was greeted by an interpreter as I can only speak English, to which was really helpful. They put me through a series of test to deem whether my eyes were suitable. As my astigmatism was my main concern, after reviewing my results, they suggested that SMILE would better suit be compared to lasik/lasek. Although lasik/lasek were my first options due cheaper pricing, SMILE was still recommended over the others due to my condition. The whole process took really fast and the procedure itself took 10 mins or less. Overall, today is my 2nd day and my vision is restored maybe 80%. I've been told that my vision will be blurry temporarily for the next few days and this is normal. Looking forward to the full recovery!
SMILE View on Google →Had my first appointment at the EyeOnce Eye Clinic. I have been experiencing a lot of problems with my eyes, and I felt it pertinent to go see the doctor. My experience was very efficient and smooth. I had a comprehensive eye health check-up, to which I was told my eyes were in good health, though the main concern was the dryness of my eyes. I didn't want to rush into having any surgery, to which they assured me that, I can come back any time. They recommended that I get the IPL treatment, which focuses on the dryness of the eyes. I look forward to my eyes responding well to the treatment. My experience was smooth and efficient. There is no long waiting period. Everything was done in detail. I will be returning next year for sure for my mole removals next year for sure. Thank you EyeOnce Eye Clinic. 10/10 recommend 💗 ❤️
IPL Treatment View on Google →Tell us your prescription and travel dates. Our English-speaking team will tell you what fits and set up your visit — free of charge, no pressure.
A 3-minute walk from Sinnonhyeon Station, in Gangnam, and about 60–75 minutes by taxi from Incheon International Airport.
5–6F, Duo Sinnonhyeon, 368 Sapyeong-daero, Seocho-gu, Seoul, South Korea
+82-10-6308-0984 — English, Chinese, Mongolian & Thai
Mon, Tue, Thu, Fri 09:00–18:00 · Sat 09:00–16:00 · Lunch break 13:00–14:00 · Closed Wed & Sun
By appointment only · Registration may close early depending on the day’s schedule.
Sinnonhyeon Station (Line 9 / Sinbundang Line) — 3 min walk. Gangnam Station (Line 2) nearby.