Sunken Eyes: Filler vs Fat Transfer — Which Fits Your Eyelids?

I'm Dr. Jong Seon Kim, a director at Gangnam HERA in Seoul. I'm a full member of the Korean Society of Oculoplastic Surgery and spend most of my clinical time on fillers. Patients with sunken upper eyelids often ask whether they should use filler or their own fat. In this video my colleague Dr. Jong Hoon Lee and I compared the two using real cases from our clinic — and included one case where the honest answer may have been something else entirely.

My short answer: fat transfer can last longer, but it needs harvesting, often several sessions and a very skilled hand to avoid lumps. Filler is soft, quick and has little downtime, which is why many patients now prefer it. But first, check that the eyelid opens with normal strength.

What should be checked before filling a sunken eyelid?

How deep the hollow is, and how strongly the eye opens. This is the first thing Dr. Lee looks at, and I agree with him. If the eyelid opens well, the plan is to fill the hollow — with filler or with your own fat. If the eye-opening strength is weak, the tired look is partly a muscle problem, and filling alone will not fix it. That decides whether we are talking about a simple filling or a surgical conversation.

Why do upper eyelids become sunken?

There are several reasons, and often more than one applies.

• Anatomy you are born with. Some people simply have deeper-set eyes.
• Family history. When a parent's eyes become sunken with age, the children's often do too.
• Volume loss with age. The fat that supports the area under the brow shrinks over time.
• Relatively prominent eyes. When the eyeball sits a little forward, the area above it can look deeper.

In practice, we see a lot of slim patients with a parent who had sunken eyes. Less often, the cause is ptosis — a problem with the muscle that lifts the eyelid. Our first case in the video had no problem with eye-opening strength. The area under her brow had simply hollowed, so I corrected it with filler.

Filler or fat transfer: how do they compare?

Both can work. They differ in how hard they are to place, how long they last and how much they ask of you.

Placing it smoothly

For the upper eyelid I use a very soft filler. Fat particles are much larger. That makes fat transfer more technically demanding in thin eyelid skin: the fat has to go into a deeper layer to avoid lumps you can feel or see, and the amount has to be right to avoid problems. It is possible to get a result like our first case with fat — but it is harder.

How long it lasts

Here fat has the advantage. Filler breaks down over time and eventually disappears. Transferred fat, once it takes, becomes living tissue, so when it is done well it can last much longer.

What it asks of you

Fat transfer means fat must be harvested first and then grafted, and it often takes a second session, sometimes a third, to reach the goal. Filler is done in one short visit, with very little downtime. In the past, fat transfer was the common choice for sunken eyes. These days the trend has moved toward filler, mostly because patients care so much about getting back to daily life — and for international patients on a short trip, that matters even more.

Can filling a deep hollow bring back a double eyelid?

Yes, if there was a crease there to begin with. Our second case was a man whose eyelids were so hollow that from a distance he looked like he had a deep crease — but up close there were several folds, not one clean line. He had actually had a natural double eyelid all along. The hollow was so deep that it pulled the skin upward and split the crease into layers.

I treated him with filler. Once the hollow was filled, a single, clear crease appeared. The result looked almost as if he had had double-eyelid surgery: the hollow was filled and his crease was back. Two benefits from one treatment.

When is filling not the answer?

When the tired look comes from a weak eyelid, not only from the hollow. Our third patient had no crease at all. After filling, the hollow improved, but because she had no crease to bring back, only a slight fold line remained.

Dr. Lee's view was worth hearing. If she had only wanted the hollow filled, filler was fine. But her eye-opening strength was a little weak, which gave her a sleepy look. In that situation he felt that a surgical eyelid correction to strengthen the opening, with a subtle inner crease, might have given a clearer, brighter eye — and a similar look — even without filling. I think he was right: sometimes the best answer is not a filling method at all. That is a separate surgical consultation, and it is exactly why we check eyelid strength first.

What does eyelid filler involve at HERA?

A short visit, soft filler in a small amount, and very little downtime.

1. Eyelid check. Hollow depth, skin thickness, any existing crease and eye-opening strength.
2. Honest route choice. Filler, or a referral to a surgical conversation if the eyelid muscle is the main issue.
3. Soft filler, placed little by little. I check with your eyes open and closed as I go.
4. Stop early. A slightly under-filled eyelid looks natural; an over-filled one looks swollen.

The treatment takes about 30 minutes with numbing cream. Mild swelling or a small bruise can appear and usually settles within about a week. HERA's domestic HA fillers generally last around 6–12 months and imported ones around 12–18 months. You get an itemized written estimate before anything is injected, and an English interpreter throughout. For more on who suits filler here, see dermal fillers for sunken eyes: who they suit and where they stop; if you are new to filler, the first-timer's guide to fillers in Korea covers the basics.

The honest limits

Filler is temporary, it cannot create a crease you never had, and it cannot strengthen a weak eyelid. Fat transfer can last longer but asks more of you and is harder to place smoothly. Neither is right for every eye. What matters is matching the method to the cause — and sometimes the right method is neither.

When it does fit, a sunken eyelid filled with a soft filler can change a tired face in one short visit. You can see more real HERA results in our before-and-after gallery.