Lumi Eyes or tear trough filler for dark circles?

Two treatments get suggested for dark circles more than any others, and they do close to opposite things. Lumi Eyes is a polynucleotide injection that works on the quality of the skin itself. Tear trough filler is a gel that replaces volume underneath it. Which is right depends on what is making the area look dark, and that is worth establishing before anyone picks up a needle. We set out every option we offer for this area, what each one costs and which type of dark circle it suits, on our page about under eye treatments.

Dark circles are not one problem

The framework set out by Huang and colleagues, summarised in a 2016 review in the Journal of Clinical and Aesthetic Dermatology, splits under-eye darkness into four types. Pigmented circles are a brown hue from melanin. Vascular circles are blue or purple, caused by vessels showing through thin, translucent skin. Structural circles are not pigment at all: they are a shadow cast by a hollow at the orbital rim. Mixed circles are two or three at once, and mixed is the commonest presentation by some margin.

Telling them apart is straightforward in clinic. Gently stretching the skin makes a shadow disappear while true pigment stays put. That review is also honest that the evidence base here is thin, with much of the thinking borrowed from melasma research rather than built on trials in this area.

Not every dark circle is cosmetic either. Rubbing from hayfever or eczema, iron deficiency, thyroid problems and simple genetics all contribute. If your history points that way, the first step is your GP.

What Lumi Eyes actually is

Lumi Eyes is a polynucleotide product: purified fragments of DNA, derived from salmon, supplied at 2 mg per ml with fragment sizes in the region of 250 to 350 kilodaltons. It is injected very superficially, with a fine 32 gauge needle, in a series of small deposits under the eye.

The mechanism explains the limits. The fragments act as a scaffold in the dermis and stimulate fibroblasts, the cells that make collagen and elastin, so the skin builds more of its own supporting structure and holds water better. That gives you thicker, less crepey skin. It does not give you volume. Nothing is being filled.

The evidence is promising and young. A randomised, double-blind, split-face trial by Lee and colleagues in 2022, with 27 participants, compared polynucleotides against non-crosslinked hyaluronic acid around the eyes: overall aesthetic scores were similar, while polynucleotides did better on elasticity, hydration and surface roughness over time. A narrative review in the Journal of Clinical Medicine in June 2026 reported no serious complications across 219 treated patients, with side effects that were mild and short lived. That review is equally clear that direct comparative studies remain limited and the trials are small.

Two honest caveats. Results build over weeks rather than appearing on the day, and most protocols run to three sessions about four weeks apart with maintenance twice a year. And you will see marketing suggesting you walk out with nothing to show for it. That is not our experience: expect small raised blebs for a few hours, and accept that bruising is a realistic possibility in an area this vascular. Polynucleotides sit in the same family as skin boosters and bioremodelling.

What tear trough filler actually is

Tear trough filler is a crosslinked hyaluronic acid gel, placed deep and usually onto the bone at the orbital rim, to reduce the depth of the groove so it casts less shadow. Unlike polynucleotides the change shows almost immediately, once the first few days of swelling settle. For a genuine structural hollow, nothing else non-surgical does the same job.

It also lasts longer than most people are told. A retrospective study of 155 patients treated between 2007 and 2023, published in 2025, found meaningful results still present at 18 months. That cuts both ways: the same study found delayed complications appearing at an average of around 16.8 months, including swelling, blue-grey discolouration, lumps and migration.

The reported rates are not small. The 2026 review cites malar oedema in about 11 percent of cases, blue-grey discolouration in 31.3 percent and contour irregularities in 30.5 percent. Rarer and more serious is vascular occlusion. Ophthalmology sources put central retinal artery occlusion at roughly 1 in 10,000 injections across the face, and it can cause loss of vision that does not recover. Hyaluronic acid can be dissolved with an enzyme, which materials like fat cannot, but dissolving is its own procedure with its own risks and does not always return the area to how it started.

So we treat the tear trough as a cautious, small-volume area rather than a generous one, on the same principle set out on our page about dermal fillers.

How we decide between them

If the darkness stays on stretching and reads brown, it is pigment, and neither injection is the answer. That is a job for topical treatment, sun protection and sometimes light or laser based options. If it reads blue or purple and the skin is visibly thin, polynucleotides are the more logical choice, because thickening and hydrating the dermis makes the vessels underneath less visible.

If it disappears when you stretch the skin, it is a shadow, and only volume or surgery changes a shadow. That is filler territory, or in advanced cases a surgical opinion rather than a syringe. Where both are present, which is most of the time, we start with skin quality and reassess. Improving the skin first often reduces how much filler is needed, and occasionally shows that none is.

If you are not sure which of the four types you have, the sensible next step is an assessment rather than a booking. Our under eye treatments page lists what we use for each type, the prices and the honest limits of each one.

Who these treatments do not suit

Neither is appropriate during pregnancy or breastfeeding. Polynucleotides derived from fish DNA are not suitable if you have a fish allergy. If you have an active infection, or eczema, dermatitis or any inflammatory skin condition flaring in the area, treatment waits until it has settled. Autoimmune conditions and immunosuppression need individual assessment, and we do not carry out either treatment on anyone under 18.

Tear trough filler in particular is a poor choice if you are prone to fluid retention or wake up puffy, if you have thyroid disease affecting fluid balance, or if you have had malar oedema before. Hyaluronic acid attracts water, and in the wrong under-eye it can make puffiness worse and keep it that way for a long time. If you take blood thinning medication or have a bleeding disorder, the bruising risk needs a proper conversation first.

The honest summary

Neither injection makes dark circles disappear. Lumi Eyes improves the skin sitting over the problem, which helps most when thin, crepey skin is the problem. Tear trough filler removes a shadow by filling the hollow that casts it, and carries the higher risk of the two. The evidence for polynucleotides here is encouraging but still early, and we would rather say so than oversell it.

The most useful thing we can do is look at the area properly, work out which of the four types you are dealing with, and tell you plainly if the answer is neither. Our clinical team offers a free 30 minute consultation for exactly that, with no obligation afterwards. You can book a consultation online and get a straight assessment of what is causing your dark circles and what, if anything, is worth doing about it.