How Double Eyelid Surgery Works
쌍꺼풀 수술 (ssangkapeul susu, literally “double eyelid surgery”) creates or deepens the supratarsal crease — the fold that runs across the upper eyelid when the eye is open. Approximately 50% of East Asian individuals are born without this crease due to a structural difference: the levator aponeurosis (the tendon that lifts the eyelid) does not send attachment fibres through the orbicularis muscle (the ring of muscle surrounding the eye) to the overlying skin. Without those attachments, the skin folds smoothly over the eyelid margin rather than folding inward to create a visible crease.
Surgery works by engineering those attachments artificially. The two primary methods achieve this differently:
Non-incisional method places sutures (stitches) through tiny puncture points along the eyelid to tether the skin to the deeper tarsal plate (the firm cartilage-like structure that gives the eyelid its shape). No tissue is removed. The crease forms because the skin is now mechanically anchored at the desired fold line.
Incisional method makes a continuous cut along the planned crease line, allows the surgeon to directly remove excess skin, fat, and fibrous tissue, and then sutures the skin edge down to the levator aponeurosis. The crease is created by direct tissue attachment rather than by suture tethering alone, which is why incisional results are considered permanent.
A third variant, partial incision, makes a short horizontal cut — typically 10–15 mm — allowing limited fat removal while preserving the faster recovery profile of the non-incisional approach.
When drooping (ptosis — pronounced TOE-sis — meaning the eyelid sits lower than normal due to a weak levator muscle) is also present, a full incisional approach allows the surgeon to tighten the levator aponeurosis during the same procedure, opening the eye more fully. This combined correction is one reason Korean surgeons frequently assess for ptosis during the initial consultation.
Plastic surgery and dermatology collectively account for the largest share of procedures sought by international patients visiting Korea,¹ and Gangnam-gu (강남구, Gangnam-gu, the southern Seoul district that hosts the majority of aesthetic clinics) receives approximately 60% of medical tourists seeking aesthetic procedures.¹
Technique Comparison: Suture, Partial, and Full Incision
Four technique configurations cover the majority of double eyelid cases performed in Korea. The right choice depends primarily on eyelid thickness, the amount of excess skin present, whether ptosis correction is needed, and how long a patient can commit to recovery.
Selecting between techniques is not purely a patient preference decision. A surgeon assessing eyelid thickness through physical examination will typically recommend against non-incisional technique for patients with thick or fat-heavy upper eyelids, because the sutures cannot hold a clean crease against the weight of the tissue. Attempting non-incisional on unsuitable anatomy is one of the primary drivers of early crease loosening. The consultation is therefore diagnostic as well as aesthetic — measurements of crease height (typically 4–6 mm in Korean practice, lower than historical Western norms of 7–9 mm) should be agreed and marked before any procedure begins.
KSPRS board-certified surgeons² complete a minimum of 6 years of medical school and a 4-year plastic surgery residency before passing board examinations,² giving them the anatomical foundation to assess ptosis accurately and plan combined procedures safely.
Ideal Candidates for Double Eyelid Surgery
Often a good candidate
- Thin to moderately thick upper eyelids without excess skin — best suited to non-incisional (suture) technique with fastest recovery
- Patients with excess upper eyelid skin or subcutaneous fat who want a permanent result — incisional technique addresses both the crease and tissue simultaneously
- Patients with confirmed mild to moderate ptosis (drooping eyelid) who also want a double eyelid crease — full incision with simultaneous levator tightening resolves both concerns in one procedure
- Patients with realistic expectations for a natural crease height (4–6 mm range) that suits Asian facial anatomy rather than a dramatically high or deep Western-style fold
- Non-smokers or those who can cease smoking at least 2 weeks before and after surgery — smoking impairs wound healing in incisional cases
Should reconsider or wait
- Patients wanting a very high or dramatic crease that may not suit their underlying facial proportions — surgeons will counsel against placements that would look incongruous with periorbital anatomy
- History of keloid or hypertrophic scarring — incisional technique produces a fine scar along the crease line that typically fades well, but abnormal scarring history warrants careful discussion
- Patients who have had recent eye surgery (e.g., LASIK, cataract removal) within the past 3–6 months — timing should be confirmed with both the oculoplastic and refractive teams
- Patients with significant dry eye syndrome — post-operative swelling can temporarily worsen dryness symptoms and should be managed in consultation with an ophthalmologist
- Those with limited flexibility in their travel schedule — underestimating the follow-up window, particularly for incisional cases, risks missing stitch removal or early complication review
Not a suitable candidate
- Uncontrolled thyroid eye disease (Graves' ophthalmopathy) — active orbitopathy causes ongoing eyelid position changes that make surgical planning unreliable and results unstable
- Active eyelid infection, stye, or blepharitis (eyelid margin inflammation) — surgery through infected tissue carries risk of spreading infection to the orbit
- Patients who cannot commit to the recovery period and post-operative instructions, including avoidance of strenuous activity, contact lenses, and eye makeup during the healing window
Candidacy assessment also involves reviewing the overall upper face. A surgeon may identify brow ptosis (sagging eyebrows compensating for drooping eyelids) during the consultation — in such cases, operating on the eyelid alone without addressing the brow can produce a suboptimal result. Raising this question during consultation is appropriate.
Results and Longevity
The crease created by double eyelid surgery becomes visible as swelling resolves. For non-incisional cases, the initial crease appears immediately but will look inflated for the first 1–2 weeks. The settled result — reflecting true crease depth and shape — typically emerges at 4–8 weeks. For full incisional cases, the final result takes 3–6 months as post-surgical fibrosis (internal scar tissue formation that stiffens before softening) gradually resolves.
Non-incisional longevity is the key limitation of the suture method. Loosening — where the tethering sutures gradually fail and the crease fades or disappears — occurs in an estimated 20–40% of cases within 5–10 years. Risk factors for earlier loosening include thicker eyelids, single-suture technique, and physical factors such as frequent eye rubbing. Loosening does not harm the eye but typically requires revision, usually to a partial or full incisional technique.
Incisional longevity is considered permanent in the sense that the structural tissue attachments created during surgery do not disappear. However, the appearance of the crease will change gradually with age as skin elasticity decreases and orbital fat redistributes — this is true of all eyelid surgery. Most patients report stable, satisfying results for decades.
Crease height has a significant effect on perceived naturalness and longevity of aesthetic satisfaction. Korean surgeons typically plan crease placements in the 4–6 mm range above the lash line, which reads as natural within Asian periorbital anatomy. Requests for higher placements (above 7 mm) should be discussed carefully with reference photographs to ensure alignment between expectation and anatomy.
Revision surgery is more complex than primary surgery because scar tissue from the first procedure must be managed. Choosing the correct technique at the outset — matched to anatomy and long-term goals — reduces revision likelihood.
Recovery Timeline
Procedure is performed under local anaesthesia with sedation in most cases. Non-incisional takes 20–40 minutes; full incisional 60–90 minutes; combined ptosis correction extends to 90–120 minutes. Cold compresses applied immediately post-procedure. Head elevation recommended when resting.
Maximum swelling and bruising. Eyes may appear swollen shut on waking, particularly after incisional technique. Vision is unaffected but eye makeup, contact lenses, and strenuous activity must be avoided. Sleeping with head elevated (two pillows) reduces swelling accumulation overnight.
Non-incisional: swelling substantially reduced; most patients are socially presentable with light coverage. Incisional: bruising fading, swelling still present but softening. Initial follow-up check scheduled in this window for most Seoul clinics.
Incisional cases: stitch removal. The scar line along the crease is fine and pink at this stage. Non-incisional patients: near-settled appearance for everyday activities. Return to office work is typically feasible for both technique types by this point.
Residual swelling for incisional cases continues to fluctuate, particularly in the mornings. The crease may appear higher or more pronounced than the final result during this phase — this is normal and not a sign of over-correction. Light exercise may resume; contact sports deferred to 6 weeks.
Final result assessment window for incisional and combined ptosis cases. The crease softens, the scar fades to near-invisible within the natural fold, and swelling fully resolves. Non-incisional results are considered stable by month 2–3. Photography for before/after comparison is most meaningful at the 6-month mark.
International patient planning note: A minimum 5–7 day stay in Korea is recommended for non-incisional cases to allow an initial follow-up check before departure. For full incisional or combined ptosis correction cases, a 7–10 day stay allows stitch removal at the clinic. Returning home before stitches are removed is possible in some cases if a trusted local clinic can manage removal, but this should be confirmed with your Korean surgeon in advance.
Gangnam-gu hosts the majority of clinics performing these procedures and is well-served by accommodation options within walking distance of most surgical facilities.¹