When it comes to aegyosal (the subtle under‑eye bulge), it’s a small feature that makes a big difference – it softens your gaze, and without it, the eyes can lack sparkle. But choosing the right material can be tricky. HA filler is like a “trial version” – if you’re not satisfied, it can be dissolved and redone. Fat grafting is like a “custom‑made” option – once it survives, it’s yours long‑term, but the recovery requires more patience. Your eye shape, risk tolerance, and how much “certainty” you want will all affect your choice. This article breaks down the key differences between the two, so you can make a decision you won’t regret after seeing the full picture.
Aegyosal augmentation aims to create a natural bulge 2‑4mm below the eyelash line, mimicking the protrusion of the orbicularis oculi muscle when smiling. Whether using hyaluronic acid or autologous fat, the goal is to add volume to this area, forming a soft, full ridge. Korean doctors emphasise layered injection – superficial layers for smoothness, deep layers for structural support – while avoiding the infraorbital vessels to ensure the aegyosal looks lively when smiling and natural when at rest.
Whether choosing HA filler or fat, the following individuals are typically ideal candidates for aegyosal augmentation:
General contraindications: severe keloid tendency, coagulation disorders, active eye infections, allergy to filler materials (HA or anaesthetics), pregnancy or breastfeeding.
This is the core of the comparison. Each material has its pros and cons. The table below and analysis will help you decide based on your individual situation. Reference prices at mainstream clinics in Gangnam, Seoul, for 2026 (in KRW) are as follows:
| Comparison Dimension | HA Filler | Fat Grafting |
|---|---|---|
| Material Source | Synthetic (non‑animal) hyaluronic acid | Autologous fat harvested from abdomen/thighs, purified |
| Injection Depth | Superficial orbicularis oculi or subcutaneous layer, using cannula or sharp needle | Subcutaneous and intramuscular layers, multiple small‑volume injections |
| Recovery | Swelling subsides in 1 week; natural in 1 month | Swelling 1‑2 weeks; stabilises at 3 months (partial absorption) |
| Duration | 6‑12 months (varies by brand and metabolism) | 2‑5 years (permanent after survival) |
| Reversibility | ✔ Dissolvable (hyaluronidase) | ✘ Irreversible (cannot be removed once survived, except by liposuction) |
| Invasiveness | Minimally invasive, only needle punctures | Requires fat harvest, leaving a small extraction wound (approx. 2‑3mm) |
| Price (bilateral) | ₩1,200,000 – 2,400,000 | ₩1,500,000 – 2,800,000 |
| Suitable Candidates | First‑timers, those wanting flexibility, budget‑conscious | Those seeking long‑term results, have sufficient fat source, don’t mind liposuction |
Summary: If it’s your first time trying aegyosal augmentation or you’re worried about the result, HA filler is a safer, reversible choice. If you’re certain you want aegyosal and prefer a long‑term solution, and have adequate fat, autologous fat offers better cost‑effectiveness over time.
The two procedures are similar in the design phase, but differ in injection and post‑operative stages:
Step 1 – Aesthetic design (same): The doctor marks the ideal width, projection, and position of the aegyosal while you smile.
Step 2 – Anaesthesia (same): Topical anaesthetic cream or micro‑injections of local anaesthetic.
Step 3 – Injection procedure:
HA filler: The “fan‑shaped withdrawal” technique is used to evenly inject HA into the superficial layer, with moulding during injection.
Fat grafting: Fat is first harvested (abdomen/thigh), purified by centrifugation, then injected into the aegyosal area using a 1ml syringe in a grid‑like pattern.
Step 4 – Dynamic adjustment (same): Smile repeatedly to adjust symmetry and projection.
Step 5 – Post‑operative care:
HA filler: Ice packs applied for 10‑15 minutes, then you may leave.
Fat grafting: Ice packs are applied, and the harvest site requires a compression garment for 1‑2 days.
HA filler takes about 20‑30 minutes in total; fat grafting, due to the harvest step, takes about 60‑90 minutes. Both have good pain tolerance.
Therefore, HA filler is better for “trying out” the look or for special occasions; fat grafting is for those who are certain they want aegyosal long‑term.
Q1: Which looks more natural – HA filler or fat?
Both can achieve very natural results when performed by an experienced doctor. Fat is softer because it’s your own tissue, but survival rates vary; HA filler allows precise volume control and can be equally smooth with a skilled injector.
Q2: Is aegyosal injection painful?
With topical + local anaesthesia, only a mild sting at the needle entry point, then pain‑free. HA filler with a cannula is even less painful.
Q3: Is there a big price difference?
HA filler bilateral ₩1,200,000‑2,400,000; fat grafting bilateral ₩1,500,000‑2,800,000. Fat is slightly more expensive upfront, but more cost‑effective in the long run.
Q4: If I’m unhappy with HA filler, can I switch to fat later?
Yes. After dissolving the HA with hyaluronidase, wait 1‑2 months for tissue recovery, then you can proceed with fat grafting – they do not interfere with each other.
Q5: Which hospitals in Korea are good for aegyosal augmentation?
Clinics in Gangnam such as I Contact, GIO, and VIEW have extensive experience in periocular injections. Choose KFDA‑approved HA fillers (e.g., Restylane, Juvéderm) and doctors with a large portfolio of cases.
Regardless of whether you choose HA filler or fat, aegyosal augmentation carries potential Side Effects:
Safety Advice: Choose a Certified medical institution and ensure your doctor is deeply familiar with lower eyelid anatomy. Discuss the desired aegyosal shape (width, projection, length) in detail before the procedure, and consider your lifestyle (e.g., whether frequent exercise might affect fat survival). Be realistic – aegyosal enhances approachability, but it cannot eliminate severe under‑eye bags or tear troughs; if you have such issues, combined treatment may be needed.