눈 수술 합병증 (nun susu hapbyeongjeung — eye surgery complications) range from the expected and temporary to the rare and serious. Understanding the difference before your procedure is the clearest way to avoid unnecessary alarm on one hand and delayed treatment on the other.
Korea’s position as a destination for eyelid surgery reflects genuine clinical volume: plastic surgery and dermatology collectively account for the largest share of procedures sought by the 1,170,467 international patients who received treatment in Korea in 2024.¹ That volume does not eliminate risk — it makes accurate risk information more important, not less.
Eyelid Surgery Risk Overview by Procedure Type
Four procedures make up the majority of eyelid surgeries performed in Korea: 쌍꺼풀 수술 (ssangkkeopul susu — double eyelid surgery, creating a supratarsal crease in a monolid), ptosis correction (수술로 처진 눈꺼풀을 올리는 수술 — surgically lifting a drooping upper lid), epicanthoplasty (내안각 성형술 — medial corner release to widen the visible eye horizontally), and lower blepharoplasty (하안검 성형술 — removal or redistribution of lower eyelid fat and skin).
Each carries a distinct risk profile. The table below maps the ten most clinically relevant complications across these procedures.
| Complication | Which procedures | Estimated likelihood | Severity | Onset timing | Reversible? |
|---|---|---|---|---|---|
| Asymmetry (crease height or shape difference) | Double eyelid, ptosis correction | 5–15% noticeable degree | Moderate | Apparent at 3–6 months post-op once swelling resolves | Yes — via revision after 12 months |
| Sausage eye (acute post-surgical oedema) | Incisional double eyelid, ptosis correction | Near-universal after incisional method | Mild — expected outcome, not a complication | Days 2–5 post-op, resolves in 1–2 weeks | N/A — self-resolving |
| Lagophthalmos (incomplete eye closure) | Upper blepharoplasty, ptosis overcorrection | Under 2% | Serious — corneal exposure risk | Immediate to early post-op | Partially — requires surgical revision in persistent cases |
| Ptosis worsening (new or worsened lid droop) | Double eyelid (without ptosis diagnosis), any upper lid surgery | 1–3% acquired cases | Moderate to serious | Apparent once swelling clears, 4–8 weeks | Yes — via ptosis correction surgery |
| Excessive scarring (hypertrophic or keloid) | Incisional double eyelid, epicanthoplasty | 3–8%, higher with keloid history | Moderate | 6 weeks to 6 months post-op | Partially — scar treatment, rarely full resolution |
| Epicanthal scar visibility | Epicanthoplasty | 5–10% | Mild to moderate | Apparent at 3–6 months | Partially — steroid injection, laser, or revision |
| Dry eye worsening | Upper and lower blepharoplasty | 2–5% significant worsening | Moderate — chronic | Immediate post-op, may persist | Partially — managed with drops; rarely fully reversible |
| Ectropion (lower lid turns outward) | Lower blepharoplasty | Under 1% with experienced surgeons | Moderate to serious | Early post-op | Yes — spontaneous or surgical correction |
| Infection | All incisional procedures | Under 1% in licensed facilities | Moderate — serious if orbital cellulitis | Days 3–10 post-op | Yes — with prompt antibiotic treatment |
| Revision required (any cause) | All eyelid procedures | 8–15% over 5 years | Varies | Assessed at 12 months minimum | Yes — revision surgery |
The National Forensic Service (국립과학수사연구원, Gungniip Gwahagsusawon — South Korea’s official forensic body for cause-of-death investigation) recorded 50 deaths linked to plastic surgery procedures between 2016 and 2024.² Eyelid surgery does not feature among the highest-risk procedures in that dataset — the procedures most frequently associated with fatalities were liposuction, facelift surgery, and combined multi-procedure surgeries.³ Eyelid surgery risk is concentrated in functional complications (lagophthalmos, corneal damage, dry eye) rather than systemic or anaesthetic risk, provided procedures are performed as standalone operations in licensed facilities.
Warning Signs That Require Immediate Attention
Most eyelid surgery discomfort in the first week is expected: swelling, bruising, tightness, light sensitivity, and difficulty opening the eye fully. The following signs fall outside normal recovery and require same-day medical contact.
Sudden, severe pain after the first 48 hours. A dull ache diminishing over days is normal. Sharp or escalating pain after the initial phase can indicate haematoma (血腫 — a pooling of blood under the tissue) or, more rarely, orbital compartment syndrome, which is a surgical emergency requiring decompression within hours to preserve vision.
Progressive vision changes — blurring, double vision, or reduced visual field. Any change in vision quality that worsens rather than improves warrants urgent assessment. Retrobulbar haematoma (bleeding behind the eye) is rare but can cause permanent vision loss if not decompressed within 90–120 minutes of onset.
Inability to close the eye fully after day 7–10. Some lagophthalmos — incomplete closure — is expected in the first few days due to swelling. When swelling has substantially reduced but the eyelid still cannot fully close during rest or sleep, this indicates over-resection of skin or levator overcorrection. The exposed cornea dries rapidly, and corneal ulceration can develop within days of untreated exposure. Apply preservative-free artificial tears every 1–2 hours and eye ointment at night while seeking same-day assessment.
Increasing redness, warmth, or discharge after day 5. Early post-operative redness is normal. Redness that increases after day 5, combined with yellow or green discharge and localised warmth, indicates wound infection. Periorbital cellulitis (infection spreading to the tissues around the eye) can progress to orbital cellulitis — a serious, potentially vision-threatening infection — within 24–48 hours if untreated. Cases occurring outside licensed hospital settings carry elevated mortality risk compared to procedures performed in properly licensed facilities.⁴
White or grey corneal haze visible in the mirror. This indicates corneal exposure damage. It is a medical emergency — attend an ophthalmology clinic or emergency department immediately.
Fever above 38.5°C (101.3°F) combined with any eye symptom. Systemic fever with localised eye signs suggests spreading infection and requires emergency assessment, not a wait-and-see approach.
If you are travelling and have returned home, the section on managing complications after flying home covers how to communicate your Korean operative records to a local provider quickly.
How Korean Regulation Reduces Eyelid Surgery Risk
Korea’s regulatory framework for plastic surgery creates a defined baseline of qualification that does not exist uniformly across all medical tourism destinations.
The Korean Society of Plastic and Reconstructive Surgeons (KSPRS; 대한성형외과학회, Daehan Seonghyeong Oegwa Haghoe) is South Korea’s official professional and certification board for plastic and reconstructive surgeons.⁵ Board certification requires completion of six years of medical school, a four-year plastic surgery residency, and successful passage of KSPRS board examinations.⁶ As of 2024, approximately 2,100 board-certified plastic surgeons are registered with KSPRS in Korea.⁷
Critically, KSPRS board certification is legally required to perform plastic surgery procedures in licensed medical facilities in Korea — operating without certification constitutes an illegal medical act.⁸ This differs from regulatory environments where aesthetic procedures can be performed by non-specialist practitioners with minimal or no surgical training.
KSPRS also maintains a public registry allowing patients to verify board certification by searching a surgeon’s name directly on the KSPRS website.⁹ This verification step takes under two minutes and is the single most effective pre-booking safety check available to international patients.
Three regulatory factors reduce risk in practice:
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Mandatory facility licensing. Procedures must be performed in licensed facilities with appropriate anaesthetic and emergency equipment. The NFS data confirms that cases occurring outside licensed settings carry elevated mortality risk.⁴
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Anaesthesia oversight. Nearly half of all plastic surgery fatalities in the NFS dataset involved anaesthesia-related complications.¹⁰ Procedures performed under proper sedation or general anaesthesia in licensed facilities require a qualified anaesthesiologist — a requirement that unlicensed or clinic-based settings frequently circumvent.
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Sub-specialty fellowship recognition. KSPRS recognises fellowship sub-specialties in craniofacial surgery, hand surgery, and microsurgery for surgeons completing additional advanced training beyond board certification.¹¹ For complex ptosis correction or revisional eyelid surgery, surgeons with additional oculoplastic training represent a higher standard than board certification alone.
Regulation reduces but does not eliminate risk. Surgeon experience within the board-certified pool varies substantially, and verifying case volume for the specific procedure you are considering — not just specialty certification — is a reasonable additional step.
What to Do If You Experience a Complication
While still in Korea. Return to your operating clinic as the first step for any concern that is not an emergency. Korean clinics managing international patients are accustomed to post-operative follow-up consultations and will typically have English-speaking staff or translation available. For urgent symptoms — vision changes, severe pain, signs of infection — proceed to the nearest hospital emergency department. Major hospitals in Gangnam-gu (강남구), which receives approximately 60% of medical tourists seeking aesthetic procedures,¹² have international patient centres with translation services.
Documenting your care before leaving Korea. Before departure, request: your operative report in English or with an English translation, the product or implant records if applicable, your surgeon’s direct contact information, and a written post-operative care plan. These documents are essential for any treating clinician outside Korea to understand what was done and how to manage complications.
After returning home. Contact a local ophthalmologist or oculoplastic surgeon (a specialist combining eye medicine and plastic surgery training) rather than a general practitioner for eyelid-specific complications. Bring your Korean operative records. For lagophthalmos, corneal symptoms, or ptosis, time to specialist assessment directly affects outcome — delay increases the risk of permanent corneal or visual damage.
Communicating with your Korean clinic remotely. Most Gangnam clinics managing international patients accept post-operative enquiries by messaging app (KakaoTalk is standard in Korea). Photograph the complication clearly in natural light before contacting the clinic — visual documentation accelerates assessment when you cannot present in person.
Is sausage eye normal after double eyelid surgery?
Yes — 'sausage eye' describes the severe, puffy swelling of the first 3–5 days after incisional double eyelid surgery where the eyelid appears dramatically swollen, heavy, and may not open fully. It is a normal consequence of surgical trauma and resolves as oedema subsides over 1–2 weeks. It is not a complication. Patients who are not warned about this are frequently alarmed — ask your surgeon to explain exactly what to expect on day 2–3 before your procedure.
What causes eyelid asymmetry after surgery?
Asymmetry after double eyelid or ptosis surgery can result from: asymmetric healing and swelling (which looks asymmetric during recovery but resolves), pre-existing facial asymmetry that becomes more visible with a defined crease, genuine surgical difference in crease height or position, or ptosis correction overcorrecting one side differently. Surgeons assess asymmetry at 6–12 months post-operatively, not during the swelling phase. Revising before 12 months is generally not recommended.
Can eyelid surgery make ptosis worse?
Yes — double eyelid surgery performed without diagnosing underlying ptosis can make the droop more visible, because the new crease defines the lid margin more clearly and the ptotic position becomes apparent. Additionally, inadvertent levator muscle disruption during surgery can cause acquired ptosis in a previously normal lid. Asking whether your surgeon will assess for ptosis during consultation is important, especially if one eye appears smaller or droopier than the other.
What does lagophthalmos feel like and what should I do?
Lagophthalmos is inability to close the eye fully during sleep or blinking. Symptoms include dry, irritated, red eyes — particularly on waking — and a sensation of exposure or grittiness. If you cannot close your eyelid fully more than 7–10 days after surgery (when swelling has reduced), seek urgent medical assessment. Corneal exposure can lead to ulceration if untreated. Artificial tears and eye ointment at night are the immediate management while awaiting surgical evaluation.