How Under-Eye Fat Repositioning Works
눈 밑 지방 재배치 (nun mit jibang jaebaechi, under-eye fat repositioning) addresses one of the most common structural complaints in facial aesthetics: the combination of puffy under-eye bags above a shadowed hollow below — the tear trough deformity.
The anatomy behind the problem. The orbital fat pads are three compartments of fat that sit behind the eye, cushioning it within the eye socket. As the orbital septum — the fibrous membrane that holds these fat pads in place — weakens with age (or in younger patients, through genetic predisposition), the fat pads prolapse forward, creating the visible bulge known as under-eye bags. Directly below that bulge, the tear trough ligament (a firm fibrous attachment running from the bone to the skin along the orbital rim) holds the skin down, creating the groove that casts a shadow. The result is the characteristic bulge-over-hollow pattern.
Why repositioning rather than removal. The older surgical approach was to excise (remove) the prolapsed fat, flattening the bag. This works in the short term but leaves the hollow beneath unaddressed — and over years, as remaining fat continues to atrophy, can produce a skeletonized, over-operated appearance. Repositioning takes the same prolapsed fat, releases it from its compartment, and redistributes it downward over the orbital rim to fill the tear trough groove. The bulge is reduced and the hollow is simultaneously filled using tissue already present.
The surgical steps. Under local anaesthesia with sedation or general anaesthesia, the surgeon makes an incision inside the lower eyelid (the transconjunctival approach — no skin is cut). Through this access, the orbital septum is opened, the fat pads are carefully mobilised, and the fat is either repositioned over the orbital rim and secured with sutures or, in some techniques, the tear trough ligament is also released to allow fuller correction. The incision inside the eyelid closes with dissolvable sutures or is left to heal without suturing. Total operative time is typically 45–90 minutes.
Plastic surgery and dermatology collectively represent the largest share of procedures sought by international patients visiting Korea.¹ Gangnam-gu receives approximately 60% of medical tourists seeking aesthetic procedures.²
Technique Comparison: Repositioning, Removal, and Grafting
Three surgical and one non-surgical approach address under-eye bags and hollowing. Each has a distinct anatomical target, scar profile, and longevity pattern. Understanding the differences allows a more focused consultation.
Pricing context. Transconjunctival fat repositioning in Korea typically costs ₩2.5–5M (≈USD 1,850–3,700 / AUD 2,850–5,700). Transcutaneous lower blepharoplasty with skin excision runs ₩3.5–8M (≈USD 2,600–5,900 / AUD 4,000–9,100) depending on whether upper eyelid work is combined. Fat grafting adds a harvest-site component and typically costs ₩3–6M (≈USD 2,200–4,400 / AUD 3,400–6,800). Filler in a clinic setting costs ₩300,000–800,000 (≈USD 220–590 / AUD 340–910) per session. All KRW figures converted at approximate Q2 2026 rates.
Surgeon verification. Korea’s official certification body, the Korean Society of Plastic and Reconstructive Surgeons (KSPRS; 대한성형외과학회, Daehan Seonghyeong Oegwa Haghoe), maintains a public registry where patients can verify a surgeon’s board certification by name search.³ Board certification requires six years of medical school, a four-year plastic surgery residency, and passage of KSPRS board examinations.⁴ As of 2024, approximately 2,100 board-certified plastic surgeons are registered with KSPRS in Korea.⁵ KSPRS board certification is legally required to perform plastic surgery procedures in licensed facilities in Korea.⁶
Who Is the Right Candidate
Often a good candidate
- Visible under-eye bags (orbital fat prolapse) combined with a tear trough hollow — fat repositioning addresses both simultaneously
- Age 25–55 with adequate orbital fat volume and good lower eyelid skin tone — enough fat to reposition, not too much excess skin
- Patients wanting no external scar — transconjunctival access leaves no visible incision
- Patients with a structural (shadow-based) dark circle component rather than isolated skin pigmentation
- Patients who have tried filler and found it insufficient or unsuitable — surgical repositioning offers a longer-lasting correction
Should reconsider or wait
- Significant excess lower eyelid skin — fat repositioning alone will not address skin redundancy; a transcutaneous approach with skin excision may be needed, which does leave an external scar
- Lower eyelid laxity (looseness) — all lower blepharoplasty approaches carry a risk of ectropion (outward turning of the lower eyelid) when eyelid tone is already reduced; a snap test assessment is required pre-operatively
- Dry eye syndrome — any lower eyelid surgery can temporarily worsen dry eye symptoms; a pre-operative ophthalmology assessment is advisable
- Previous lower eyelid filler — hyaluronic acid filler in the tear trough can complicate surgical planning; surgeons typically prefer filler to be dissolved before operating
Not a suitable candidate
- Thyroid eye disease (Graves' ophthalmopathy) — orbital fat and eyelid anatomy are abnormal; standard repositioning is contraindicated without specialist oculoplastic assessment
- Previous lower eyelid surgery — scar tissue changes anatomy and increases complication risk; a specialist assessment of prior surgical records is required before proceeding
- Patients expecting correction of intrinsic skin pigmentation — fat repositioning corrects structural shadow but does not reduce melanin-based dark pigmentation in the skin; different treatments (laser, topical) address pigmentation
- Active eye infection or significant uncontrolled systemic disease without medical clearance
On the dark circle question specifically. The term “dark circles” describes two distinct problems that often coexist. Structural dark circles are shadows cast by the tear trough groove — fat repositioning directly addresses this. Pigmentary dark circles are caused by increased melanin in the under-eye skin and are unaffected by any fat repositioning technique. A pre-operative consultation should assess which component predominates; patients with primarily pigmentary dark circles are not good candidates for surgery as the primary treatment.
Results and Longevity
What changes immediately after surgery. Bruising and swelling obscure the result for the first 7–14 days. By day 10, most patients see the broad shape of the outcome. Final tissue settling — particularly the softening of residual firmness along the repositioned fat — takes 6–12 weeks. The full result is typically assessed at three months.
Structural longevity of fat repositioning. Repositioned orbital fat develops a new blood supply in its repositioned location and integrates into the surrounding tissue. Because it remains living, vascularised tissue — unlike injected filler — it is not metabolised or resorbed. The structural change is considered permanent in the sense that the fat does not migrate back. Ongoing facial ageing, however, continues: the remaining orbital septum weakens, adjacent fat compartments atrophy, and ligament laxity progresses. Most patients report stable, natural-appearing results for 7–10+ years before the underlying ageing process produces new changes that may warrant reassessment.
Fat grafting longevity is different. Autologous fat grafting (transferring fat from a donor site) addresses hollowing directly but relies on the transferred fat surviving in its new location. An estimated 20–40% of transferred fat is resorbed in the first year. This means initial overfilling is standard practice — surgeons deliberately transfer more fat than the final target volume. Even with overfilling, a top-up procedure is commonly needed within 2–5 years.
Filler longevity. Hyaluronic acid filler in the tear trough is metabolised over 9–18 months in most patients, with some individual variation. It is a repeating maintenance treatment, not a one-time correction.
Korea’s 1,170,467 foreign patients in 2024¹ — a 93.2% year-over-year increase² — reflect growing international confidence in Korean surgical standards; under-eye procedures consistently rank among the most requested aesthetic surgeries by international visitors.
Recovery Timeline
Surgery performed under local anaesthesia with sedation or general anaesthesia. Duration 45–90 minutes. Patients are discharged the same day in most cases. Cold compresses begin immediately. Vision may be mildly blurry from lubricating eye drops used during surgery — this resolves within hours.
Bruising and swelling peak around 48–72 hours. Purple-blue bruising under the eyes is expected and does not indicate a complication. Sleep with head elevated (two pillows minimum) to reduce fluid accumulation. Avoid bending forward or straining. Antibiotic eye drops are typically prescribed for the first 3–5 days.
Bruising transitions from purple to yellow-green as it resolves. Swelling begins to reduce noticeably. Most patients can cover residual bruising with makeup from day 5–7 if the transconjunctival approach was used (no wound over the skin). A post-operative check at day 7 confirms normal healing before departure.
Most patients are comfortable travelling and appearing in public with light makeup. Residual swelling — a mild puffiness — persists but is not dramatic. Avoid long-haul flights until the surgeon confirms clearance; pressure changes and immobility can affect swelling. Strenuous exercise remains restricted.
Residual firmness along the repositioned fat softens. The tear trough area may feel slightly firm or uneven during this phase — this is normal tissue integration and resolves. Sun protection (SPF 50+) over the lower eye area is important during this period to prevent post-inflammatory pigmentation.
Full result is assessed at three months, when tissue swelling has fully resolved and repositioned fat has integrated. Any asymmetry assessment or discussion of further treatment is deferred to this point. Most patients see a natural, rested appearance with the tear trough groove significantly reduced.
Return-to-activity benchmarks. Desk work: day 3–5. Light walking: day 3. Gym and cardio: week 3–4 (surgeon-specific). Contact lenses: typically week 2–3, after conjunctival incision is confirmed healed. Eye rubbing should be avoided for a minimum of four weeks.
References
¹ KHIDI Medical Tourism Statistics 2024 — total foreign patients and specialty breakdown. [khidi-2024-stats-total-patients, khidi-2024-stats-top-specialties]
² KHIDI Medical Tourism Statistics 2024 — year-over-year growth and Gangnam-gu concentration. [khidi-2024-stats-yoy-growth, khidi-2024-stats-gangnam-concentration]
³ KSPRS Board Certification Registry — public verification. [ksprs-registry-public-verification]
⁴ KSPRS Board Certification Registry — training requirements. [ksprs-registry-training-requirements]
⁵ KSPRS Board Certification Registry — total certified surgeons 2024. [ksprs-registry-total-certified]
⁶ KSPRS Board Certification Registry — legal requirement for practice. [ksprs-registry-legal-requirement]