DRY EYE CLINIC · BLEPHARITIS

Red, itchy eyelids that won't clear up?

If lid wipes and warm compresses haven't worked, tiny mites called Demodex may be the reason. It's more common than you'd think — and it's treatable.

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Reviewed by Dr Nikki Peng, B.Optom (Hons 1st Class) UNSW · Last updated June 2026

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DEMODEX BLEPHARITIS

It's not a hygiene problem — it's a mite problem

Demodex blepharitis is an inflammatory eyelid condition caused by an overgrowth of tiny mites called Demodex that live in eyelash follicles and meibomian glands. These mites are found on almost every adult face — they're a normal part of skin biology. It's only when their numbers grow too high that they cause problems.

There are two types: Demodex folliculorum lives at the base of your eyelashes, and Demodex brevis burrows into the oil-producing meibomian glands in your eyelids. When populations get too large, they cause inflammation, block glands, and trigger a cycle of redness, itching, and irritation that standard treatments often can't break.

The hallmark sign is cylindrical dandruff — waxy, tube-like crusting that clings to the base of the eyelashes. You might also notice itching that's worse in the morning, recurring styes, lash loss, or dry eye symptoms that don't respond to drops. Prevalence increases with age — some studies suggest nearly 100% of people over 70 carry Demodex, though most never develop symptoms.

Demodex blepharitis isn't about poor hygiene. Regular face washing doesn't reach deep enough into the lash follicles and glands where the mites live. That's part of why it's so frustrating — people do everything "right" and still can't clear the symptoms.

"We find signs of Demodex in roughly a third of the blepharitis cases we see. It's most common in patients over 60 and those with a history of facial rosacea — though it can appear at any age."

WHY STANDARD TREATMENTS OFTEN FAIL

Lid wipes and drops manage bacteria — they don't treat mites

Standard blepharitis treatments — warm compresses, lid wipes, and antibiotic ointments — target bacteria and blocked oil glands. They're effective for bacterial blepharitis. But if Demodex mites are driving the inflammation, these treatments manage symptoms without addressing the cause. That's why many people cycle through treatments for months or years without resolution.

Antibiotics like doxycycline can reduce inflammation, but they don't eliminate Demodex. Warm compresses help unblock meibomian glands, but the mites continue to damage them. Even tea tree oil — which has some evidence against Demodex — can be irritating to the delicate eyelid skin and is difficult to use effectively at home without guidance.

The pattern we often see is a patient who's been told they have "blepharitis" and given a standard treatment plan. It helps for a few weeks, then symptoms return. The missing step is identifying whether Demodex is the driver — because the treatment pathway changes significantly when it is.

"In our experience, patients who've tried lid wipes and eye drops but keep getting red, itchy eyes and recurring styes are more likely to have an underlying issue like Demodex. Once we identify it, the treatment approach changes — and so do the results."

Tired of blepharitis that keeps coming back?

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HOW WE DIAGNOSE DEMODEX BLEPHARITIS

Looking beyond the surface to find the cause

We start with a detailed slit-lamp examination of your eyelids and lashes, looking specifically for cylindrical dandruff (collarettes) at the lash base — the hallmark sign of Demodex infestation. We then assess your meibomian glands using Meibovue meibography and measure tear film stability with the Medmont E300.

The $50 Dry Eye Test Package covers the full diagnostic workup: NIBUT (non-invasive break-up time) to measure how quickly your tear film deteriorates, plus meibography to image the oil-producing glands in your eyelids. This tells us whether the glands are healthy, partially blocked, or showing signs of dropout — and helps us distinguish Demodex-driven inflammation from other forms of blepharitis.

Meibography is a diagnostic tool — it shows us the current state of your glands, not a treatment outcome. Gland dropout, once it occurs, is permanent. That's why identifying and treating Demodex early matters — before the mites cause irreversible gland damage.

HOW WE TREAT DEMODEX BLEPHARITIS

At-home management and in-clinic treatment working together

Treatment combines targeted at-home lid hygiene with in-clinic IPL therapy for moderate to severe cases. The goal is to reduce the mite population, improve meibomian gland function, and break the inflammation cycle that keeps symptoms coming back.

At-home management: We stock Oust Demodex wipes and foam — specifically formulated products designed to reduce Demodex populations on the eyelids. Unlike general lid wipes, these contain active ingredients that target mites directly. We'll show you exactly how to use them at your appointment.

In-clinic IPL therapy: For persistent or moderate-to-severe demodex blepharitis, we use the E-Eye IRPL (Intense Regulated Pulsed Light). Growing evidence suggests that IPL reduces the inflammatory environment around the eyelids, improves meibomian gland function, and creates conditions where Demodex populations can't easily sustain themselves. A 2025 systematic review found IPL effective for reducing ocular Demodex, with enhanced results when combined with meibomian gland expression.

Our IPL Treatment Pathway is $850 all-inclusive — covering the initial assessment, NIBUT and meibography, four treatment sessions, progress checks, and a yearly review. Many patients with demodex blepharitis also have underlying meibomian gland dysfunction — IPL addresses both conditions simultaneously.

What about Xdemvy? Lotilaner ophthalmic solution (Xdemvy) was FDA-approved in the US in 2023 as the first prescription treatment specifically for Demodex blepharitis. At the time of writing, it is not yet available in Australia. We'll update this page when TGA status changes. In the meantime, IPL and targeted lid hygiene remain the primary evidence-based options available locally.

FREQUENTLY ASKED QUESTIONS

Common questions about Demodex and eyelid health

Q

What is demodex blepharitis?

It's an inflammatory eyelid condition caused by an overgrowth of Demodex mites — tiny parasites that live in eyelash follicles and meibomian glands. They're found on almost every adult face, but when numbers grow too high, they cause chronic redness, itching, and irritation.

Q

How do I know if I have demodex?

The hallmark sign is cylindrical dandruff — waxy crusting clinging to the base of your eyelashes. Other clues include morning itching, recurring styes, lash loss, and blepharitis that doesn't respond to standard lid wipes. A slit-lamp examination can confirm it.

Q

Can demodex cause dry eye?

Yes. Demodex brevis burrows into the meibomian glands, blocking the oil that stabilises your tear film. This leads to evaporative dry eye — the most common type. Treating the Demodex often improves dry eye symptoms as well.

Q

Is demodex contagious?

Not in the traditional sense. Demodex mites are already present on most adult faces — you can't "catch" them from someone else. However, close contact can transfer higher-than-normal populations, and sharing pillowcases or makeup can contribute.

Q

What kills demodex on eyelashes?

Targeted eyelid hygiene products like Oust Demodex wipes contain active ingredients against the mites. For moderate-to-severe cases, IPL therapy reduces the inflammatory environment and improves gland function. Tea tree oil has some evidence but can irritate sensitive eyelid skin.

Q

Do I need a prescription for demodex treatment?

Oust Demodex wipes and foam are available without a prescription — we stock them in-store. IPL therapy is performed in-clinic by our therapeutically endorsed optometrists. No GP referral is needed for either.

REFERENCES

1. Fromstein SR, Harthan JS, Patel J, Opitz DL. Demodex blepharitis: clinical perspectives. Clinical Optometry. 2018;10:57–63.

2. Systematic review: therapeutic effect of IPL in ocular demodicosis. Contact Lens and Anterior Eye. 2025.

3. Zhang AC, et al. IPL with optimal pulse technology on MGD with and without ocular Demodex. Annals of Translational Medicine. 2021;9(5):431.

4. Liu J, Sheha H, Tseng SC. Pathogenic role of Demodex mites in blepharitis. Current Opinion in Allergy and Clinical Immunology. 2010;10(5):505–510.

Dr Nikki Peng

B.Optom (Hons 1st Class) UNSW · Grad Cert Ocular Therapeutics · Published dry eye author

Nikki has a special interest in dry eye disease and IPL therapy. She authored "Redefining Dry Eye" (mivision, September 2009) and leads CEC's dry eye diagnostic and treatment service.

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