What Is Meibomian Gland Dysfunction? Signs, Symptoms & Treatment for MGD
If your eyes frequently feel dry, irritated, gritty, watery, tired, or your vision seems to fluctuate throughout the day, the problem may not simply be a lack of tears.
One of the most common contributors to dry eye disease is meibomian gland dysfunction, or MGD, a condition that affects the tiny oil-producing glands located within your eyelids. In fact, MGD is considered a major cause of evaporative dry eye, the form of dry eye in which tears evaporate from the surface of the eye too quickly.[1,2]
The tricky part? You can have meibomian gland dysfunction before you realize anything is wrong. Changes in the glands can sometimes be present even when symptoms are mild or absent.[3]
Understanding what these glands do and identifying dysfunction early can be an important part of protecting the health and comfort of your eyes.
What Are the Meibomian Glands?
Along the upper and lower eyelids are rows of tiny glands called the meibomian glands.
These glands produce an oily substance called meibum, which forms the outermost lipid layer of the tear film. This oil helps stabilize your tears and slows the evaporation of your tear layer between blinks.[1]
A healthy tear film isn't made up of just water. There are different components of the tear film that work together to keep the surface of the eye smooth, comfortable, and optically clear.
When the meibomian glands aren't producing or releasing healthy oils properly, tears can become unstable and evaporate too quickly. This can contribute to evaporative dry eye disease.[1,2]
What Is Meibomian Gland Dysfunction?
Meibomian gland dysfunction is a chronic abnormality of the meibomian glands.
Most commonly, the openings of the meibomian glands become blocked, and the oil they produce becomes thicker or changes in quality. Instead of releasing a thin, healthy layer of oil with each blink, the glands may produce thickened secretions that do not flow easily, making it harder for the oil to reach and protect the surface of the eye.[1]
Over time, chronic dysfunction may be associated with structural changes and loss, or "dropout," of meibomian gland tissue.[4]
This is why artificial tears alone may not provide lasting relief for every dry eye patient. While they can temporarily add moisture and improve comfort, they don't always address the underlying problem causing the tears to evaporate too quickly or become unstable in the first place.
What Does MGD Feel Like?
Meibomian gland dysfunction can cause many of the symptoms people typically associate with dry eye, including:[1,2]
Burning or stinging
A gritty or sandy sensation
Redness
Eye irritation
Watery eyes
Tired or heavy-feeling eyes
Fluctuating or blurry vision
Sensitivity to light
Difficulty wearing contact lenses comfortably
One symptom that often surprises patients is excessive tearing.
Dry eye doesn't always make your eyes feel "dry." In fact, watery eyes can actually be a sign of dry eye disease. When the tear film becomes unstable and the surface of the eye is irritated, the eyes may compensate by producing excess reflex tears. But these watery tears don't necessarily have the healthy oil layer needed to keep them stable, so they may spill over the eyelids or evaporate quickly without providing lasting relief.
Fluctuating or blurry vision can be another important clue. The tear film creates the first smooth optical surface that light passes through as it enters the eye. When that tear film breaks up too quickly or becomes uneven, vision can temporarily blur or fluctuate—often improving after a blink and becoming worse during prolonged reading, screen time, or other visually demanding tasks.[2]
What Causes Meibomian Gland Dysfunction?
MGD usually doesn't have one single cause. Instead, several factors can contribute to changes in gland function and the ocular surface.
Age, hormonal changes, certain medications, contact lens wear, eyelid inflammation, environmental conditions, skin conditions such as rosacea and demodex, and other ocular-surface disorders have all been associated with MGD or dry eye disease.[2,5]
Screen Time May Play a Role
Our digital habits may also affect the ocular surface.
When we concentrate on computers, phones, or tablets, our blinking behavior can change. Research has associated digital-device use with reduced blink rate and incomplete blinking, both of which can interfere with normal tear-film distribution and ocular-surface health.[6]
Blinking does more than simply refresh our eyes. A complete blink helps release and evenly spread the oils produced by the meibomian glands across the surface of the eye, helping keep the tear film stable and slowing evaporation.
During prolonged screen use, we tend to blink less frequently and may not blink as completely. Over time, this can contribute to tear-film instability and may worsen symptoms in people who already have dry eye or meibomian gland dysfunction.
Rosacea and Eyelid Inflammation Matter Too
The health of the eyelids, skin, and eyes are closely connected, yet that relationship is often overlooked when evaluating dry eye.
Rosacea, for example, can affect much more than the cheeks and nose. Ocular rosacea can involve the eyelids, meibomian glands, and surface of the eye, leading to inflammation, changes in the quality of the oils produced by the meibomian glands, and persistent dry eye symptoms.[2,5]
Other eyelid conditions, including blepharitis and Demodex overgrowth, can also contribute to inflammation and meibomian gland dysfunction. Recognizing these underlying conditions is important, because successful dry eye treatment isn't simply about adding moisture to the eyes—it's about identifying and treating the factors contributing to the problem in the first place.[2]
How Is Meibomian Gland Dysfunction Diagnosed?
There is no single test that can tell the entire dry eye story. Because dry eye and meibomian gland dysfunction can have multiple contributing factors, a comprehensive evaluation looks beyond symptoms to understand both the structure and function of the meibomian glands, as well as the overall health and stability of the tear film.[7]
Depending on each patient's symptoms and clinical findings, the evaluation may include assessing the eyelids and meibomian gland openings, how easily the glands release oil, the quality of those oils, tear-film stability, blink quality, and the health of the ocular surface. We may also look for signs of inflammation, blepharitis, Demodex, or other conditions that could be contributing to dry eye symptoms.
One particularly valuable tool for evaluating the health and structure of the meibomian glands is meibography.
What Is Meibography?
Meibography allows us to look beneath the surface and visualize the meibomian glands that are normally hidden within the eyelids. This specialized imaging provides a detailed view of the structure and health of the glands themselves, helping us identify changes such as gland shortening, distortion, or areas of gland loss, known as gland dropout.[4]
Why is this important? Two patients can have very similar dry eye symptoms but very different underlying causes. One patient may have glands that are structurally healthy but aren't functioning properly, while another may already have significant changes or loss of gland tissue.
Understanding the condition of the glands helps us determine the severity of the disease and develop a treatment plan based on what is actually happening—not just how the eyes feel.
This is why a comprehensive dry eye evaluation can provide much more information than simply trying another artificial tear. When we understand the underlying cause of dry eye, we can treat it more effectively and create a plan focused on protecting the long-term health of the ocular surface.
How Is Meibomian Gland Dysfunction Treated?
There is no single treatment that works for every patient with meibomian gland dysfunction. Because MGD can look very different from one person to the next, treatment should be guided by what is actually contributing to the disease—such as gland obstruction, structural gland changes, tear-film instability, inflammation, eyelid disease, ocular rosacea, Demodex, and other factors affecting the ocular surface.[2,8]
For some patients, treatment may begin with at-home therapies such as properly performed warm compresses and eyelid hygiene. Warming the eyelids can help soften thickened meibomian gland secretions and improve the flow of oils onto the tear film, making it an important part of MGD management for appropriate patients.[8,10]
For others, home treatment alone may not be enough. Depending on the type and severity of MGD, treatment may also focus on improving gland function, reducing inflammation, treating associated eyelid conditions, and restoring a healthier, more stable tear film.
Treatment options may include:
Targeted eyelid hygiene
Warm compress therapy
Meibomian gland expression
In-office eyelid treatments
Thermal therapies
Treatment for blepharitis or Demodex
Anti-inflammatory therapy when appropriate
Prescription dry eye medications
Tear-film support
Lifestyle and environmental modifications
Modern dry eye care increasingly recognizes that treatment should be individualized to the specific factors contributing to each patient's disease rather than applying the same approach to everyone.[2,8]
When Should You See a Dry Eye Doctor?
Occasional eye irritation doesn't necessarily mean you have meibomian gland dysfunction (MGD). But if dry, burning, watery, gritty, or fluctuating eyes have become a regular problem, it may be time for a closer look at your tear film and meibomian glands.
Consider a dry eye evaluation if you:
Rely on artificial tears throughout the day
Notice symptoms worsening as the day goes on
Experience blurry vision that temporarily clears after blinking
Have increasing contact lens discomfort
Frequently experience watery or irritated eyes
Have rosacea, blepharitis, or chronic eyelid inflammation
Have tried dry eye treatment without enough relief
At The Eye Collective in Winter Park, FL, we provide comprehensive dry eye evaluations designed to identify the underlying causes of your symptoms. By evaluating the tear film, eyelids, ocular surface, blinking, and meibomian glands, we can develop a treatment plan based on what your eyes actually need.
Ready to Find the Cause of Your Dry Eye?
Dry eye isn't one-size-fits-all, so the treatment shouldn't be either.
If you're struggling with persistent dry eye symptoms, schedule a dry eye evaluation with The Eye Collective in Winter Park to better understand what's causing your symptoms and explore treatment options tailored to your eyes.
References
1. Nelson JD, Shimazaki J, Benitez-del-Castillo JM, et al. The International Workshop on Meibomian Gland Dysfunction: report of the definition and classification subcommittee. Investigative Ophthalmology & Visual Science. 2011;52(4):1930-1937. doi:10.1167/iovs.10-6997b.
2. Jones L, Downie LE, Korb D, et al. TFOS DEWS II Management and Therapy Report. The Ocular Surface.2017;15(3):575-628. doi:10.1016/j.jtos.2017.05.006.
3. Abu A, Rakhimov A, Taushanova A, Karibayeva A. Prevalence of asymptomatic meibomian gland dysfunction in the general adult population: a systematic review and meta-analysis. 2026.
4. Pult H, Riede-Pult BH. Non-contact meibography: keep it simple but effective. [Meibography review literature]. Saudi Journal of Ophthalmology. doi:10.1016/j.sjopt.2012.08.007.
5. Sabeti S, Kheirkhah A, Yin J, Dana R. Management of meibomian gland dysfunction: a review. Survey of Ophthalmology. 2020;65(2):205-217. doi:10.1016/j.survophthal.2019.08.007.
6. Wolffsohn JS, Lingham G, Downie LE, et al. TFOS Lifestyle: Impact of the digital environment on the ocular surface. The Ocular Surface. 2023;28:213-252. doi:10.1016/j.jtos.2023.04.004.
7. Tomlinson A, Bron AJ, Korb DR, et al. The International Workshop on Meibomian Gland Dysfunction: report of the diagnosis subcommittee. Investigative Ophthalmology & Visual Science. 2011;52(4):2006-2049. doi:10.1167/iovs.10-6997f.
8. Jones L, et al. TFOS DEWS III: Management and Therapy. American Journal of Ophthalmology. 2025. doi:10.1016/j.ajo.2025.05.039.
9. Yin Y, Gong L. Reversibility of gland dropout and significance of eyelid hygiene treatment in meibomian gland dysfunction. Cornea. 2017. doi:10.1097/ICO.0000000000001042.
10. Geerling G, Tauber J, Baudouin C, et al. The International Workshop on Meibomian Gland Dysfunction: report of the subcommittee on management and treatment of meibomian gland dysfunction. Investigative Ophthalmology & Visual Science. 2011;52(4):2050-2064. doi:10.1167/iovs.10-6997g.