Have you ever dealt with persistent itchy, red, or gritty eyes that just won’t clear up? The problem might not be just dry eye or allergies, but a microscopic guest: Demodex eye mites. Microscopic mites (specifically D. folliculorum and D. brevis) are naturally present on human skin but can overgrow and cause inflammation, a condition known as Demodex Blepharitis.
What are Demodex? They are microscopic arachnids that live in hair follicles and oil glands. Overgrowth is common, especially with age, weakened immune systems, or conditions like rosacea.
Common Symptoms (Demodex Blepharitis):
- Itching or burning eyes (often worse in the morning).
- Red, inflamed eyelid margins.
- Collarettes: Waxy, cylindrical dandruff-like crusting at the base of the eyelashes—this is a classic sign of Demodex.
- Gritty, foreign body sensation.
- Loss of eyelashes (madarosis).
These symptoms often look like other conditions (like dry eye) but don’t respond well to standard treatments. If you have tried hot compresses and every artificial tear under the sun and still experience redness and irritation, you need an evaluation with your doctor.
Treatment and Home Care
Tea Tree Oil Products
Tea Tree oil , specifically its component Terpinen-4-ol, is a potent natural miticide (mite killer). Tea tree products are widely available in local retail and online. We carry Oasis lid wipes, plus a foaming cleanser and a cleaning oil, both from We Love Eyes. When used daily, these products can help decrease the mite population and decrease symptoms.
Caution is critical with tea tree products, it can be highly irritating. Use only commercial available products formulated specifically for eye lid hygiene.
General Eyelid Hygiene
- Daily Warm Compresses: Helps unclog oil glands, but does not kill the mites. Our providers generally recommend 10 minutes twice a day to help with meibomian gland dysfunction (MGD) and long term dry eye maintenance. You can use a hot washcloth, though it may need to be re-heated to get the full 10 minutes, or there are many types of dry eye hot compresses available online. We carry a product in the clinic that can be warmed in the microwave for fast application. There are also USB models, though they generally need to be pre-heated.
- Gentle Cleansing: Regular washing of the face and eyelids to remove excess sebum and debris. Over the counter tea tree cleaners like the We Love Eyes products can be used.
- Environmental Hygiene: Washing pillowcases and bedding frequently in hot water.
If home remedies are not enough, there is a new prescription medication that eradicates Demodex mites. XDEMVY is the first and only FDA-approved prescription eye drop.
Its active ingredient is lotilaner, an antiparasitic, and it is typically administered twice a day for 6 weeks. Clinical trials showed it significantly reduced the crusting (collarettes) and successfully eradicated the mites in a large percentage of patients after the 6-week course.
The most common side effect reported is temporary stinging and burning upon application (in about 10% of patients). Other reported side effects include styes/chalazion and punctate keratitis. Xdemvy is only available by prescription, your doctor will be able to evaluate your eyelid and follicles to see if Demodex mites might be the source of your eye irritation.
At Northwest Vision, we work to treat the underlying cause of dry eye symptoms, whether those symptoms are a result of demodex blepharitis, meibomian gland disease, or lid laxity resulting in incomplete blink. See any of our dry eye specialists today for a complete evaluation and begin to feel better now!
Curious of your symptoms might be related? Try the quiz @ https://xdemvy.com/demodex-blepharitis-quiz