The under-eye area is often the first place to show that you are tired, stressed, or simply getting older. Dark circles, hollowing, fine lines, and crepey skin can make you look exhausted even when you feel fine. It is also one of the most common concerns that brings people to an aesthetic clinic, and one of the most searched treatment areas in Ireland.
It is also, importantly, one of the most technically demanding areas to treat. The skin under the eyes is the thinnest on the face, the anatomy is complex, and the margin for error is small. This guide explains the main treatment options available in Ireland, what they cost, how they differ, and why choosing an experienced, qualified practitioner matters more here than almost anywhere else on the face.
Why the under-eye area is so difficult to treat
Before looking at treatments, it helps to understand why this area is uniquely challenging.
The skin around the eyes is extremely thin and delicate, with fewer oil glands and less structural support than the rest of the face. This is why it shows ageing and fatigue earlier than anywhere else, and why it reacts poorly to treatments that work perfectly well elsewhere. The area sits over a complex arrangement of muscle, fat pads, and blood vessels, and there are major blood vessels close to the surface. Treating it carelessly carries real risks, which is why this is not an area for inexperienced or unqualified injectors.
It also helps to understand what is actually causing your under-eye concern, because different causes need different treatments. Hollowing and shadowing are usually caused by volume loss, where the loss of fat and bone support creates a sunken appearance that casts a shadow and reads as a dark circle. Crepey texture and fine lines are a skin-quality issue, caused by thinning skin and loss of collagen. Pigmentation is genuine darkening of the skin, often genetic or related to sun exposure. Puffiness is usually caused by fat pads pushing forward or fluid retention. Many people have a combination of these, which is why a proper assessment is the essential first step rather than simply choosing a treatment and hoping it works.
Tear trough filler
Tear trough filler uses dermal filler, typically a soft hyaluronic acid product, injected beneath the eye to restore lost volume and reduce the hollowing that creates shadows and dark circles. When the hollow is filled, the shadow lifts, and the under-eye area looks smoother and more rested.
Tear trough filler is best suited to people whose main concern is volume loss and hollowing, where there is a clear sunken area casting a shadow. The results are immediate, which makes it appealing for anyone wanting a visible change before a specific event.
It is not suitable for everyone. People with significant puffiness, very thin skin, or a tendency to retain fluid are often poor candidates, because filler in these cases can worsen puffiness or create a bluish discolouration known as the Tyndall effect. This is exactly why assessment matters so much. A responsible practitioner will sometimes tell you that you are not a good candidate for tear trough filler, and that honesty is a sign of a good practitioner, not a lost sale.
In Ireland, tear trough filler typically costs between €300 and €550, usually using 0.5ml to 1ml of product. Results generally last between six and twelve months before the filler is gradually absorbed and a top-up is needed.
A crucial safety point: because of the delicate anatomy and the proximity of major blood vessels, tear trough filler should only ever be performed by a highly experienced, medically qualified practitioner who carries hyaluronidase (the enzyme used to dissolve filler if there is a problem) and knows how to manage complications. This is not a treatment to choose on price.
Polynucleotides for the under-eye area
Polynucleotides have quickly become one of the most popular under-eye treatments in Ireland, and for good reason. Rather than adding volume, they work at a cellular level to stimulate the skin's own repair processes, improving skin quality, hydration, and elasticity. You can read our full guide to polynucleotides in Ireland for the complete picture.
For the under-eye area specifically, polynucleotides are particularly valuable because they address the skin-quality issues that filler cannot, things like crepey texture, fine lines, and thin, tired-looking skin. They also carry a lower risk profile in this delicate area than traditional filler, because they do not add volume that could migrate or cause puffiness. This makes them suitable for many people who are not good candidates for tear trough filler.
The trade-off is that results are gradual rather than immediate. Polynucleotides work by stimulating biological processes, so improvement develops over several weeks as new collagen is produced. A course of three to four sessions is typically needed, spaced a few weeks apart.
In Ireland, under-eye polynucleotide treatment typically costs between €200 and €350 per session, with a full course generally ranging from €600 to €1,200. Results commonly last around nine to twelve months, which tends to be longer than tear trough filler.
Tear trough filler or polynucleotides: which is right?
This is the question most people researching under-eye treatment eventually arrive at, and the honest answer is that it depends entirely on what is causing your concern.
If your main issue is genuine hollowing and volume loss, where there is a clear sunken area, tear trough filler may be the more effective option because it directly restores the lost volume. If your main issue is skin quality, crepey texture, fine lines, or thin, dull skin, polynucleotides are often the better choice because they improve the skin itself rather than filling beneath it. Many people actually have both volume loss and skin-quality concerns, and in those cases a practitioner may recommend a combination approach, using polynucleotides to improve skin quality and a small amount of filler to address hollowing.
The key point is that this is not a decision to make yourself based on price or what worked for a friend. It is a decision to make with a qualified practitioner who has assessed your specific under-eye anatomy and identified what is actually causing your concern. A practitioner who recommends the same treatment for everyone, without assessing the underlying cause, is one to avoid.
Other under-eye options
While tear trough filler and polynucleotides are the two most common injectable treatments for the under-eye area, they are not the only options.
Skin boosters can improve hydration and skin quality in the under-eye area, similar to polynucleotides though working primarily through hydration rather than regeneration. Medical-grade skincare, particularly products containing retinoids, vitamin C, and peptides, can improve under-eye skin quality over time and is often recommended alongside clinical treatments. For pigmentation specifically, treatments and topical products that target melanin may be more appropriate, and you can read more in our guide to pigmentation and sun damage.
It is also worth knowing when an aesthetic treatment is not the answer. Significant under-eye bags caused by prolapsed fat pads may not respond well to injectable treatments and sometimes require a surgical solution (lower blepharoplasty), which is a procedure carried out by a plastic surgeon or oculoplastic surgeon. A good aesthetic practitioner will tell you honestly if your concern falls outside what injectables can achieve.
Why qualification matters most here
We say this in every guide, but it carries particular weight for the under-eye area: the person holding the needle matters more than anything else.
The combination of thin skin, complex anatomy, and major blood vessels close to the surface means that complications in this area, while rare in skilled hands, can be serious. Filler injected incorrectly near the eye carries a small but genuine risk of vascular complications. An experienced, medically qualified practitioner understands the anatomy, uses appropriate technique, carries the products needed to manage a complication, and knows when not to treat. An unqualified or inexperienced one may not.
In Ireland, dermal fillers (including tear trough filler) can currently be administered by anyone, regardless of medical training, because the area remains unregulated. This makes it especially important to choose your practitioner carefully. We always recommend choosing someone registered on the Medical Council, Dental Council, or NMBI register.
Finding a verified practitioner
The under-eye area is not the place to choose a practitioner based on price or social media presence. It is the place to choose based on qualification and experience.
You can search for register-verified aesthetic practitioners offering under-eye treatments across Ireland on SafeSkin. Every clinic in our directory has been independently checked against the Medical Council, Dental Council, or NMBI register. If you are unsure which under-eye treatment suits your concern, our treatment quiz can help guide you, or read our guide on how to choose a qualified aesthetic practitioner before you book.
Medically reviewed by Dr Stephen Creedon
All SafeSkin editorial content is reviewed by a registered medical professional before publication.