Most people who come to me with dry eye are surprised to learn that their problem is not “too few tears.” In many cases the eye produces a perfectly normal quantity of tears — and yet it is dry, burning and irritated. The reason is usually a condition called meibomian gland dysfunction, or MGD for short. It is the most common cause of dry eye in the Western world, and yet many people have never heard of it — and sometimes have not been correctly diagnosed with it either.
On this page I will explain exactly what happens in these glands, why it causes dryness, how the condition is diagnosed, and what the treatment ladder looks like — from home care to advanced in-clinic treatments. The goal is for you to understand the problem in depth, because a correct understanding is the first step to effective treatment.
What the Meibomian Glands Are and What They Do
Along the eyelid margins — both upper and lower — sit dozens of tiny oil glands called the meibomian glands. Each eyelid has roughly 25 to 40 of them, and they secrete a thin layer of oil every time you blink.
This oil is a critical component of the tear film. Your tear is not just water — it is built from three layers, and its outer layer is made of the oil produced by the meibomian glands. The oil’s role is to stop the tear from evaporating too quickly: without it, the tear film “breaks up” within seconds, and the eye is exposed and dries out even if it is full of tears.
What Happens in MGD and Why It Causes Dryness
In MGD, these glands stop working properly. The oil they produce becomes thick and viscous, their openings become blocked, and in advanced cases the glands themselves atrophy and shorten. The result: less normal oil reaches the tear film, the tear evaporates too quickly, and the eye feels dry.
This mechanism is called evaporative dry eye — dryness caused by increased evaporation, as opposed to aqueous-deficient dry eye, caused by low tear production. This distinction matters greatly, because it determines the correct treatment. Adding artificial tears for someone with MGD soothes temporarily but does not solve the problem — because the issue is not a lack of fluid but a lack of the layer meant to protect it.
MGD is also often linked to chronic inflammation of the eyelid margins (blepharitis), and the two feed each other: the inflammation damages the glands, and the damaged glands worsen the inflammation.
Typical Symptoms of MGD
The symptoms overlap with those of dry eye in general, but several features raise suspicion of MGD specifically:
- A sensation of dryness, burning or grittiness that worsens through the day
- Symptoms that are worse in the morning, right on waking
- Redness and a feeling of heaviness in the eyelids
- Intermittent blurred vision that improves after blinking
- A sense that artificial tears help only briefly
- Sometimes, discharge or a small “crust” on the eyelid margin in the morning
It is important to remember that dry eye is not merely a discomfort. Untreated MGD over time can cause gradual and irreversible damage to the glands themselves — which is why early diagnosis and treatment matter.
How MGD Is Diagnosed
Diagnosis begins with an assessment of the eyelid margins and an examination of the glands themselves. In the clinic I look at several things: the state of the gland openings (whether they are open or blocked), the quality of the oil expressed with gentle pressure (normal oil is clear like olive oil; in MGD it is cloudy, thick, sometimes like toothpaste), the stability of the tear film (how quickly it “breaks up” after a blink), and the degree of inflammation at the margins.
In certain cases we also use imaging of the glands (meibography), which allows us to see the structure of the glands and the extent of their atrophy. This complete picture is what makes it possible to build a precise treatment — because not every MGD is the same, and not every patient needs the same treatment.
The MGD Treatment Ladder
MGD is a chronic condition. This is a truth worth stating honestly: it cannot be “cured” and finished with, but it can certainly be controlled well and quality of life improved significantly. Treatment is built as a ladder — starting at the base, adding steps as needed and according to severity.
Step 1 — Basic Home Care
For mild to moderate MGD, consistent home care can make a big difference:
- Warm compresses on the eyelids, which warm and melt the thickened oil and allow it to flow
- Gentle eyelid massage after warming, to help the glands empty
- Daily cleaning of the eyelid margins to maintain hygiene and reduce inflammation
- Sometimes, omega-3 supplements, which may improve oil quality
The key here is consistency — home care works only when done regularly, not only when symptoms flare.
Step 2 — Medical Treatments
When home care is not enough, tailored medical treatment is added: drops or ointments to reduce inflammation, sometimes a low-dose antibiotic with an anti-inflammatory effect, and high-quality artificial tears containing lipids, which support the tear film better than ordinary tears.
Step 3 — Advanced In-Clinic Treatments
For moderate to severe MGD, or when the earlier steps have not been enough, there are advanced treatments that act directly on the glands. The main one is IPL treatment — pulsed light that warms and opens the glands, reduces the inflammation around them, and allows them to resume functioning. It is usually combined with expression (controlled massage) of the glands in the clinic. There are also other dedicated thermal treatments that warm and empty the glands in a targeted way.
The choice between treatments, and the combination of them, is determined by the state of your glands, the degree of inflammation and the severity of symptoms — and so it always begins with an accurate diagnosis.
When to See a Specialist
Mild, occasional dryness can usually be managed on your own. But it is worth seeing a cornea and ocular-surface specialist for an evaluation if:
- The symptoms persist for weeks and interfere with your daily life
- Artificial tears help only briefly
- You recognise symptoms typical of MGD, such as heaviness in the eyelids or worsening in the morning
- There is redness or recurrent inflammation at the eyelid margins
- You have become unable to tolerate contact lenses as you once could
The earlier MGD is diagnosed — before the glands atrophy — the more effective the treatment and the better the outcome.
If you recognise yourself in the descriptions here and would like to find out exactly what is causing your dryness and what the right treatment is for you, you are welcome to get in touch and schedule an evaluation. We will start with an accurate assessment of the glands and the ocular surface, and from there build a tailored treatment plan together.
Frequently Asked Questions
What is MGD in the eyes? MGD (meibomian gland dysfunction) is a condition in which the tiny oil glands along the eyelid margins stop working properly. They produce thickened oil or become blocked, so the oil layer of the tear film is compromised, the tear evaporates too quickly, and the eye feels dry. It is the most common cause of dry eye.
What is the difference between MGD and ordinary dry eye? Dry eye stems from two main causes: low tear production (aqueous-deficient dry eye), or the tear evaporating too quickly because the oil layer is lacking (evaporative dry eye). MGD causes evaporative dry eye — the eye produces enough tears, but they evaporate quickly. Treatment for MGD is therefore different, focusing on restoring the glands rather than simply adding fluid.
Can MGD be cured? MGD is a chronic condition that cannot be cured completely, but it can be controlled well. With tailored treatment — from consistent home care to advanced treatments such as IPL — most patients achieve a significant, durable improvement in symptoms and quality of life. Early diagnosis and treatment prevent irreversible damage to the glands.
How is MGD treated? Treatment is structured as a ladder: it begins with home care (warm compresses, eyelid massage and cleaning, sometimes omega-3), continues with medical treatment to reduce inflammation and artificial tears containing lipids, and in moderate to severe cases moves to advanced in-clinic treatments such as IPL and gland expression. The treatment is determined by the severity and the state of the glands.
Do warm compresses help with MGD? Yes, warm compresses are a cornerstone of home treatment for MGD. The heat melts the thickened oil blocking the glands and allows it to flow, especially when combined with gentle eyelid massage after warming. The key is consistency — regular use, not only when symptoms flare.
