Under Eye Filler Singapore — Tear Trough Filler, Explained

Most people who search for under eye filler in Singapore are not really asking about filler. They are asking why they look tired when they are not, and whether an injection can change that. The answer depends on what is producing the darkness under the eye, and only one of the usual causes is something a filler can reach.

That is the difficulty with this area. The lower eyelid skin is among the thinnest on the body, and the same words, dark circles, are used for shadows, pigment, blood vessels and bags that have nothing to do with each other. A filler placed for the wrong reason can make a bag look larger or leave a bluish line where there was only a shadow. This guide sets out which causes filler addresses, how a physician tells them apart, and what the risks are.

Under eye filler, also called tear trough filler, is a soft hyaluronic acid gel placed on the bone along the lower orbital rim to make the groove between eyelid and cheek shallower. It addresses a shadow caused by hollowing. It does not lighten pigment, hide blood vessels or reduce an eye bag, so the cause is confirmed first.

On this page

1. Key Facts
2. What the Tear Trough Is
3. The Causes of Dark Circles That Filler Does and Does Not Address
4. Who Tear Trough Filler Suits, and Who It Does Not
5. How a Physician Distinguishes a Hollow From a Bag
6. What Happens During Treatment
7. Recovery
8. Risks, Stated Plainly
9. Alternatives, by Mechanism
10. What Determines the Cost
11. Tear trough vs dark circles: what is the difference?
12. Can dark circles be removed?
13. How long does tear trough filler last?
14. How Dr Sin Yong approaches under eye filler

Key Facts

At a glance

Anatomical target

The tear trough: the groove running from the medial canthus (inner corner of the eye) outward along the inferior orbital rim, bounded medially by the tear trough ligament and laterally by the orbicularis retaining ligament

Product class

Cross-linked hyaluronic acid (HA) gel of low elastic modulus (low G′) and low HA concentration, typically in the 12–20 mg/mL range; a product class, not a dose

Placement plane

Supraperiosteal: on the bone at the inferior orbital rim, deep to the orbicularis oculi muscle

Delivery

Blunt-tip cannula (commonly 25 G) or fine needle, chosen at assessment according to anatomy and the pattern of hollowing

Vascular consideration

Infraorbital artery and nerve exiting the infraorbital foramen roughly 6–10 mm below the rim; angular artery and vein medially near the nose

Skin thickness

Lower eyelid skin is approximately 0.5 mm thick, thin enough for superficially placed gel to scatter light (the Tyndall effect)

Reversibility

HA filler can be enzymatically degraded with hyaluronidase; non-HA fillers cannot

Classification

Injectable medical treatment, prescribed and performed by a medical practitioner after consultation

What the Tear Trough Is

The tear trough is not a patch of dark skin. It is a groove in the surface contour that begins at the medial canthus and runs downward and outward along the bony rim of the eye socket. Dissection work by Wong, Hsieh and Mendelson identified a true ligament, the tear trough ligament, that tethers skin and orbicularis oculi muscle to the bone along the medial part of this line; further out, the orbicularis retaining ligament continues the tethering laterally.

Individual product pages: Sculptra · Ellansé · Radiesse · Deusaderm (injected collagen).

Because the skin is held down along the ligament while the cheek tissue below it descends and the orbital fat above it bulges forward, a step forms. Light from above misses the groove, so the groove reads as a shadow. Thinning of the fat pads either side of the ligament deepens the step over time, even without any pigmentation.

Under eye filler places a small quantity of soft hyaluronic acid gel on the bone beneath that groove. It does not move the ligament. It raises the floor of the trough so that the step is shallower and the shadow it casts is smaller. That is the entire mechanism, and it explains everything filler cannot do.

The Causes of Dark Circles That Filler Does and Does Not Address

Dark circles are a description, not a diagnosis. Four different things produce them, often more than one at once; the types of dark eye circles have their own page.

• Structural shadow from hollowing. The darkness disappears when light is shone directly into the trough and returns when light comes from above. This is a contour problem, and it is the one cause that is filler-responsive.
• Pigmentation. Brown or grey-brown discolouration of the skin itself, often familial and more pronounced in the Fitzpatrick III to V skin types that predominate in Singapore. It is present regardless of lighting. Filler does nothing for pigment; stretching pigmented skin over a fuller contour can make it more noticeable.
• Vascular show-through. A purple or bluish tint from the orbicularis muscle and its vessels visible through thin skin. Filler on the bone can partly mask this by adding a layer between vessel and surface, but the effect is partial.
• Eye bags from fat prolapse. Orbital fat pushing forward against a weakened septum produces a bulge above the trough, so the trough looks deeper because the bag beside it is higher. Filler cannot reduce a bag, and volume placed beside it can blend the two into one larger mound. The causes of eye bags are a separate subject.

The assessment question is therefore never "would you like filler". It is "which of these four is producing what you see".

“Filler fills a hollow. It cannot lighten pigment and it cannot hide a bag.”

Dr Sin YongOn the limits of tear trough filler

Who Tear Trough Filler Suits, and Who It Does Not

The person who suits this treatment has a distinct hollow along the orbital rim, reasonably firm and even skin over it, no significant bag above it, and dark circles that are mostly shadow rather than colour. In that person a small volume placed on the bone addresses the actual cause.

Several findings argue against filler:

• Prominent eye bags. Filler beside a bag tends to enlarge the apparent bag. Fat prolapse is a question for eye bag removal, not for volume.
• Malar oedema or festoons. Fluid retention in the mounds over the cheekbone, below the orbicularis retaining ligament. Hyaluronic acid is hydrophilic; placing it near tissue that already drains poorly can worsen swelling that is difficult to reverse.
• Very thin, crepey skin. Thin skin makes the Tyndall effect and surface irregularity more likely, and it does not become thicker because there is filler beneath it.
• Pigmentation-dominant dark circles. If the darkness is in the skin rather than in the shadow, filler is the wrong tool.
• Previous over-filling. Residual product from earlier treatment, sometimes years old, needs to be identified and often dissolved before any new plan is made. Filler correction is its own process.

How a Physician Distinguishes a Hollow From a Bag

The distinction is made by examination, not by photograph. In the tilt test, the head is tilted back and the gaze directed upward: a shadow caused by a hollow softens as the angle of light on the face changes, while a bulge of orbital fat remains and often becomes more prominent as the fat is pushed forward. Gentle pressure on the closed upper eyelid has the same effect, transmitting pressure to the orbital fat so that any prolapse shows itself.

The skin is stretched to see whether darkness moves with it (pigment) or fades (shadow). The trough is palpated to feel where the bony rim is and how much soft tissue lies over it. The cheek is assessed too, because a descended mid-face deepens the eyelid-cheek junction, and in some faces the more logical place to add volume is the cheek. Where earlier filler is suspected, ultrasound is used to see it. The treatment is planned individually from what the examination finds, and the finding may be that filler is not the treatment.

What Happens During Treatment

Once the tear trough has been confirmed as the cause, the skin is cleaned and a topical anaesthetic may be applied; most products used here also contain lidocaine. The entry point is chosen away from the infraorbital foramen and the angular vessels.

With a cannula, a single small entry point is made in the cheek skin and the blunt tip is passed along the bone to the trough. A blunt cannula pushes vessels aside rather than piercing them, which is one reason it is often chosen here; a fine needle is used where the anatomy calls for it. Either way the gel is deposited supraperiosteally in very small aliquots, with the physician watching the contour change as each is placed, then moulded by hand. Correction is deliberately conservative: the aim is a shallower groove, not a flat one, because the tissue takes up water afterwards and because over-correction has to be dissolved.

Recovery

Recovery varies. Some swelling, tenderness and pinpoint bruising at the entry point are normal, and the area can feel slightly firm or uneven while the gel settles. Cold compresses, sleeping with the head raised and avoiding pressure on the area help early on.

What warrants review is different: pain that is increasing rather than settling, skin that turns pale, mottled or dusky, any change in vision, or a lump or bluish line that persists once the swelling has gone. These should be reported to the treating physician promptly rather than watched.

Risks, Stated Plainly

The lower eyelid is an unforgiving place to inject, and the risks are real.

• Tyndall effect. Gel placed too superficially, or too much of it, scatters short-wavelength light through the thin skin and shows as a bluish tint. It is treated by dissolving the product.
• Lumps and irregularity. The skin here shows everything. Irregularity that persists once swelling has settled is moulded or dissolved.
• Malar oedema. Persistent swelling of the cheek mounds, more likely in people with a pre-existing tendency to fluid retention there. It may need hyaluronidase.
• Over-correction. A trough filled flat, or one that has taken up water, produces a puffy, "pillow" appearance. See pillow face treatment.
• Vascular occlusion. Rare but serious. Filler entering the infraorbital or angular vessels can block blood supply to the skin and, through connections to the ophthalmic circulation, to the eye; vision loss from filler has been reported in the medical literature. This is why under eye filler belongs with a physician who knows the anatomy, injects slowly on the bone, and keeps hyaluronidase on hand to dissolve HA product without delay.

Reversibility is the other half of the risk discussion. Because the product is hyaluronic acid, most problems that arise from it can be undone by degrading it, which is why non-HA fillers, which cannot be dissolved, have no place in the tear trough.

Alternatives, by Mechanism

Because the four causes are different, the alternatives act on different tissues rather than competing with filler.

• Skin boosters and polynucleotides are directed at skin quality: hydration, thickness and fine crepiness of the eyelid skin itself. They add no structural volume. See skin boosters.
• Pico laser is directed at pigment. Picosecond pulses fragment melanin in the skin and do nothing for contour. See pico laser.
• Eye bag removal is directed at prolapsed orbital fat, the one cause filler can make worse.
• Filler dissolving with hyaluronidase is directed at previous over-correction or migrated product, and is often the first step rather than an alternative.

Many people need more than one of these because they have more than one cause. The guide to dark eye circle treatment covers how they are combined, and the dermal fillers guide explains how tear trough product differs from the firmer gels used in the cheek and chin.

What Determines the Cost

The cost of under eye filler is set out at consultation, after assessment, because it depends on what the examination finds: the product chosen and the quantity the anatomy calls for; whether the trough alone is treated or the cheek is volumised as well to support it; whether earlier product first has to be dissolved; and whether filler is combined with a skin-quality or pigment treatment directed at a different cause. A quote given before the examination is a quote for a treatment not yet planned.

Consultations with Dr Sin Yong are by appointment at Orchard Road, Singapore.

Tear trough vs dark circles: what is the difference?

The tear trough is a structure; dark circles are an appearance. The tear trough is the groove that runs from the inner corner of the eye along the bony rim of the socket, held down by the tear trough ligament. Dark circles describe any darkening under the eye, whatever produces it.

The two overlap only where the darkness is a shadow cast by that groove. When the tear trough deepens, light from above misses it and the groove reads as a dark line, and tear trough filler can make the step shallower. When the darkness is pigment in the skin, vessels showing through thin skin, or a bag sitting above the groove, the tear trough itself may be unremarkable and filler has nothing to correct.

That is why the same complaint, 'my dark circles', can lead to filler for one person, pico laser for another and a referral for eyelid surgery for a third. A search for tear trough treatment presumes the cause; the examination confirms it.

Can dark circles be removed?

Dark circles can usually be improved rather than removed, and how they respond depends on which cause is producing them. Many people have more than one, so a plan that names each component is more realistic than a single 'dark circle removal' treatment.

A shadow from a hollow is addressed with carefully placed hyaluronic acid on the bone. Pigment in the skin is addressed with pico laser, alongside daily sun protection, because ultraviolet exposure keeps stimulating melanin in Singapore's climate. Vascular show-through can be partly masked by adding a layer between vessel and surface, but the effect is partial. Thin, crepey skin is addressed with skin boosters and polynucleotides. A bag of prolapsed orbital fat is structural, and where it is the main cause, referral to a plastic surgery or oculoplastic specialist for lower eyelid surgery is discussed.

Sleep, allergy and rubbing the eyes affect how prominent dark circles look from one day to the next, but they do not change a hollow or a fat prolapse. Part of the assessment is separating what is structural from what fluctuates, because the two are managed differently.

How long does tear trough filler last?

There is no fixed duration for tear trough filler. How long it remains depends on the product, the amount placed, the depth of placement and how quickly the individual breaks down hyaluronic acid. In the tear trough, where there is relatively little movement, product often persists for longer than people expect.

That has a practical consequence. Product placed years earlier can still be present, and adding more on top of it is one of the common routes to a puffy, over-corrected look. Before any top-up, the area is examined, and where earlier filler is suspected, ultrasound is used to see what remains.

Hyaluronic acid is gradually broken down by the body, and the face around it keeps ageing: the cheek continues to descend and the fat pads either side of the ligament continue to change. Maintenance is therefore planned from what the examination shows at each review rather than on a calendar, and because hyaluronic acid is reversible, the plan can be adjusted as the face changes.

Under-eye treatment options compared by cause

Option	What it does	What it cannot do	Typical recovery	Who it tends to suit
Tear trough filler (soft, low-concentration hyaluronic acid placed on the bone)	Raises the floor of the tear trough so the step between eyelid and cheek, and the shadow it casts, is shallower	Lighten pigment, reduce an eye bag or thicken thin skin	Swelling, tenderness and pinpoint bruising that settle; reversible with hyaluronidase	A distinct hollow along the orbital rim, reasonably firm skin over it and no significant bag above it
Skin boosters and polynucleotides	Directed at the quality, hydration and thickness of thin, crepey eyelid skin	Add structural volume or fill a tear trough	Small raised injection points or bruising that settle	Thin or crepey lower-lid skin where quality, not contour, is the main issue
Pico laser (pigment-type dark circles)	Picosecond pulses fragment melanin in the skin, directed at brown or grey-brown discolouration	Change contour, fill a hollow or reduce a bag	Varies with settings and skin type; discussed before treatment	Dark circles that look the same whatever the lighting, because the colour is in the skin rather than in a shadow
Energy-based tightening and laser approaches for lower-lid laxity	Work on slackened, crepey lower-lid skin that folds and reads as a bag	Remove prolapsed orbital fat or fill a hollow	Varies with the modality used; discussed before treatment	Under-eye fullness driven by laxity and crepe rather than a discrete bulge of fat
Filler dissolving with hyaluronidase	Breaks down earlier hyaluronic acid filler causing a Tyndall effect, lumps, malar oedema or over-correction	Treat a hollow on its own; it is often the first step before a new plan	Swelling that settles; the area is reassessed once it has	Residual, migrated or over-corrected product from previous treatment
Lower blepharoplasty (eyelid surgery), referred to a plastic surgery or oculoplastic specialist	Removes or repositions prolapsed orbital fat, with or without excess skin	Change pigment, vascular show-through or skin quality	Surgical recovery, guided by the operating team	A true bag of prolapsed orbital fat that filler would make more prominent

How Dr Sin Yong approaches under eye filler

Dr Sin Yong confirms the cause before choosing a product. He examines the under-eye area with the head tilted back and the gaze upward, applies gentle pressure to the closed upper eyelid to reveal any fat prolapse, stretches the skin to separate pigment from shadow, and palpates the orbital rim to judge how much tissue lies over the bone. The cheek is assessed at the same visit, because in some faces it is the more logical place to add support. Where earlier filler is suspected, he scans with ultrasound, and residual product is often dissolved before any new plan is made.

When filler is appropriate, he uses a soft, low-concentration hyaluronic acid gel placed on the bone, deep to the orbicularis oculi muscle. A blunt-tip cannula through a single entry point in the cheek is often chosen, with a fine needle where the anatomy calls for it, and the entry point is placed away from the infraorbital foramen and the angular vessels. The gel is deposited in very small amounts while the contour is watched, moulded by hand, and deliberately left short of a flat correction, with hyaluronidase on hand throughout.

What happens if something goes wrong after tear trough filler?

If something goes wrong after tear trough filler, the first step is examination by the treating doctor, because the right response depends on what the problem is. Because the product used here is hyaluronic acid, most problems can be addressed by dissolving it with hyaluronidase, which is kept on hand at every treatment.

A bluish tint from gel sitting too superficially, a lump that persists once the swelling has gone, or a puffy over-filled look are managed by dissolving the product, sometimes after an ultrasound scan to see exactly where it sits. Malar oedema, the swelling of the cheek mounds, may also need hyaluronidase and can take longer to settle.

A blocked blood vessel is the emergency. Skin that turns pale, mottled or dusky, or pain that is increasing rather than settling, calls for immediate review and prompt dissolving of the product. Any change in vision is treated as urgent, and the patient is sent straight to emergency eye care.

A lump that appears weeks later, especially if it is red, warm or tender, is examined rather than massaged, because infection and inflammatory nodules are managed differently from simple excess product. Knowing who to call, and that they will answer, is part of the plan agreed before treatment.

Tear trough hollow, eye bag or dark circle: how the three differ at examination

What is checked	Tear trough hollow	Eye bag (prolapsed orbital fat)	Pigment or vascular dark circle
What it is	A groove along the bony rim of the eye socket that casts a shadow	Orbital fat pushing forward against a weakened septum, forming a bulge above the groove	Colour in the skin itself, or vessels and muscle showing through thin skin
Light shone directly into the area	The darkness fades because the shadow is filled with light	The bulge remains, with a shadow beneath it	The colour stays whatever the lighting
Head tilted back, eyes looking up	The shadow softens as the angle of light changes	The bulge stays or becomes more prominent	Little change
Skin gently stretched	The groove remains under the skin	The bulge remains	Pigment moves with the skin; a bluish tint may lighten slightly
Does tear trough filler help?	Yes, this is the cause filler is directed at	No; volume beside a bag tends to enlarge it, and surgical assessment is discussed	Not for pigment; for vascular show-through the effect is partial at most

Frequently Asked Questions

What is under eye filler?+

Under eye filler is a soft, low-concentration hyaluronic acid gel placed on the bone at the inferior orbital rim to raise the floor of the tear trough, the groove that runs from the inner corner of the eye along the eye socket. By making the step between eyelid and cheek shallower, it reduces the shadow that step casts. It is an injectable medical treatment performed by a doctor after an assessment of what is causing the darkness.

Does tear trough filler get rid of dark circles?+

Only when the dark circles are a shadow cast by a hollow. Dark circles caused by pigmentation in the skin, by blood vessels showing through thin skin, or by eye bags are not corrected by filler, and a bag can look larger once volume is placed beside it. Assessment first establishes which cause is present; many people have more than one, and each is directed at with a different treatment.

How does a doctor tell a hollow from an eye bag?+

A hollow and a bag are distinguished at examination rather than from photographs. With the head tilted back and the gaze directed upward, a shadow from a hollow softens while a bulge of orbital fat stays or becomes more prominent. Gentle pressure on the closed upper eyelid pushes orbital fat forward and reveals any prolapse. The skin is stretched to separate pigment from shadow, and the rim of the bone is palpated to judge how much tissue lies over it.

Which filler is used for the tear trough?+

The tear trough is treated with a cross-linked hyaluronic acid gel of low elastic modulus and relatively low HA concentration, typically in the 12 to 20 mg/mL range. Softer gels of this class integrate into thin tissue with less visible edge and less water uptake than the firmer gels used for the cheek or chin. The specific product is chosen at consultation. Non-hyaluronic acid fillers are not used in this area because they cannot be dissolved.

How much filler is needed under the eyes?+

Volumes in the tear trough are small and are decided at assessment, not in advance. The amount depends on the depth of the groove, the thickness of the tissue over the bone, and whether the cheek is being supported at the same time. Correction is kept conservative because the tissue takes up water afterwards and because a slight under-correction is straightforward to add to, whereas over-correction has to be dissolved.

Is under eye filler injected with a needle or a cannula?+

Either can be used, and the choice is made according to the anatomy. A blunt-tip cannula, commonly 25 G, enters through a single small point in the cheek and is passed along the bone, pushing vessels aside rather than piercing them, which is one reason it is often chosen for this area. A fine needle allows very precise placement in some patterns of hollowing. In both cases the gel is deposited on the bone, deep to the orbicularis oculi muscle.

What are the risks of under eye filler?+

The recognised risks are bruising and swelling, a bluish tint where gel sits too superficially under thin skin (the Tyndall effect), lumps or irregularity, persistent swelling of the cheek mounds (malar oedema), a puffy over-corrected appearance, and, rarely, blockage of a blood vessel. Vascular occlusion in this region can affect the skin and, through connections to the eye's circulation, vision. These risks are why the treatment belongs with a physician who knows the anatomy and keeps hyaluronidase available.

Can under eye filler be dissolved?+

Hyaluronic acid filler can be broken down with hyaluronidase, an enzyme injected into the area where the product sits. This is used to correct a Tyndall effect, lumps, malar oedema or over-correction, and it is the emergency treatment if a vessel is blocked. Reversibility is one of the main reasons hyaluronic acid is the only class of filler used in the tear trough. Product that was placed years earlier can still be identified, often with ultrasound, and dissolved.

What is recovery like after tear trough filler?+

Recovery varies. Swelling, tenderness and small bruises at the entry point are normal early on, and the area may feel slightly firm or uneven while the gel settles. Cold compresses, sleeping with the head raised and avoiding pressure on the area help. Increasing pain, skin that becomes pale, mottled or dusky, any change in vision, or a lump or blue line that persists after the swelling has gone should be reported to the treating doctor promptly.

What are the alternatives if filler is not suitable?+

The alternative depends on the cause. Skin boosters and polynucleotides are directed at the quality and thickness of thin, crepey eyelid skin. Pico laser is directed at pigment in the skin. Eye bag removal is directed at prolapsed orbital fat, which filler can make more prominent. Dissolving previous filler is the first step where earlier over-correction is found. Because several causes often coexist, more than one of these may be combined in an individually planned sequence.

Is tear trough filler the same as under eye filler?+

In practice, yes. Under eye filler and tear trough filler usually describe the same treatment: a soft hyaluronic acid gel placed on the bone beneath the groove that runs from the inner corner of the eye along the orbital rim. Some people use 'under eye filler' more loosely for any injection below the eye, so it is worth confirming which area, which class of product and which plane are being proposed.

Can under eye filler move or migrate over time?+

It can. Filler placed too superficially, in too large a volume, or added repeatedly on top of earlier product can spread beyond the trough and show as puffiness or a bluish tint. Placing small amounts on the bone, keeping correction conservative and checking for earlier product before any top-up all reduce that risk. Because the product is hyaluronic acid, migrated filler can be identified, often with ultrasound, and dissolved.

Is there a right age for tear trough filler?+

Suitability depends on the anatomy rather than the age. Younger people often have a hollow as the main cause and firm skin over it, which is the pattern filler suits. With age, eye bags, lax crepey skin and fluid around the cheek mounds become more common, and each of these argues against filler. An older patient with a clean hollow may still suit it; a younger one with a true bag may not.

Will I see the result of tear trough filler straight away?+

The change in the groove is visible at the end of the appointment, but it is not the final picture. Swelling and the water the gel draws in alter the contour over the first days, and the area is judged once that has settled. That is why correction is kept conservative on the day and any adjustment is decided at review rather than at the first visit.

Who is not a good candidate for under eye filler?+

Anatomy rules some people out and medical history rules out others. Prominent eye bags, swelling of the cheek mounds, very thin crepey skin and dark circles that are mainly pigment are the findings that argue against filler, as set out above. Treatment is also deferred during pregnancy and breastfeeding, and with an active infection, cold sore or inflamed skin near the eyes. A known allergy to hyaluronic acid products or lidocaine, previous reactions to filler, autoimmune conditions, and a bleeding tendency or blood-thinning medication are discussed before anything is planned. Suitability is decided at consultation.