Meibomian Gland Dysfunction (MGD): Why Most Dry Eye Starts at the Eyelids

Meibomian Gland Dysfunction (MGD): Why Most Dry Eye Starts at the Eyelids

If you've been told your eyes are dry, there's a good chance the story actually begins at your eyelids.

Along the edge of each eyelid sits a row of tiny oil glands called the meibomian glands. When they stop working well, it's called meibomian gland dysfunction, or MGD. It's one of the most common reasons behind dry, tired eyes, and it's also one of the most manageable once it's found early.

Here's a gentle guide to what MGD is, how to spot it, and what you can do about it.

What are meibomian glands?

The meibomian glands are small oil glands lined up inside your upper and lower eyelids. Their openings sit right along the lid edge, just behind your lashes.

Where they are

Around 20 to 40 glands in each eyelid, running vertically like fine threads.

What they make

A clear, light oil called meibum, released a little every time you blink.

Why it matters

This oil forms the outer layer of your tear film and slows tear evaporation.

What is MGD?

In meibomian gland dysfunction, the oil changes. It becomes thicker, more like butter than olive oil, and the gland openings can become blocked.

With less oil reaching the surface, your tears evaporate faster. The result is the dry, gritty, tired feeling many people describe, even when the eyes are producing plenty of tears. This is why MGD is the leading cause of evaporative dry eye. You can read more about the different types in our complete guide to dry eye.

Can you have MGD without symptoms?

Yes. MGD often starts quietly. The glands can be partly blocked, or even begin to shorten, before your eyes feel noticeably dry. This is one reason a check-up is worthwhile if you spend long hours on screens or wear contact lenses, even when your eyes feel mostly fine.

Signs of MGD

  • Dry, gritty or burning eyes, often worse later in the day
  • Eyes that feel tired after screen use
  • Vision that blurs, then clears when you blink
  • Watery eyes that still feel dry
  • Red or slightly swollen eyelid edges
  • Crusting or stickiness along the lashes in the morning
  • Contact lenses becoming less comfortable

What contributes to MGD

MGD usually builds up gradually, from a mix of everyday factors:

  • Screen time: we blink less, and less completely, when focusing on a screen. Full blinks are what help push oil out of the glands
  • Contact lenses: long-term wear is associated with changes in the glands
  • Eye makeup and lash extensions: eyeliner on the inner lash line, lash glue and incomplete makeup removal can clog the openings
  • Age and hormones: gland function naturally changes over time
  • Skin conditions: conditions such as rosacea are closely linked with MGD
  • Some medications: for example, certain acne treatments can affect the glands

How MGD is assessed

MGD can't be confirmed by symptoms alone, so a detailed look at the glands matters. A dry eye assessment for MGD usually includes:

  1. 1
    Eyelid margin examination
    A slit lamp view of the lid edges and gland openings, checking for blockages and redness.
  2. 2
    Gland expression
    Gentle pressure on the eyelid shows how easily oil flows, and whether it's clear or thickened.
  3. 3
    Meibography
    Infrared imaging that shows the structure of each gland, including any shortening or loss.
  4. 4
    Tear film stability (NITBUT)
    Measures how quickly your tear film breaks up, which reflects how well the oil layer is working.

Caring for MGD

The aim is simple: help the oil flow freely again, and keep the glands healthy over time.

At home

  • Warm compresses: gentle, steady warmth helps soften thickened oil so it can flow
  • Eyelid hygiene: cleaning the lash line daily with an eyelid cleanser reduces build-up at the openings
  • Lipid-based artificial tears: preservative-free drops with an oil component support the tear film's outer layer
  • Full blinks: a few slow, complete blinks during screen time help the glands release oil

In clinic

When home care isn't enough, in-clinic treatments can work more directly on the glands. IPL helps improve gland function and eyelid inflammation, RF uses gentle heat to melt thickened oil, and MGX clears blocked openings. These are often combined, depending on your assessment. Our dry eye guide explains each one in more detail.

Why early care matters

Blocked glands can often improve with the right care. But glands that have already shrunk generally don't grow back. Looking after them early helps protect the gland function you have, which is why we encourage an assessment before symptoms become severe.

Frequently asked questions

Is MGD the same as a stye?

Not quite, but they're related. A stye is usually a small infection near the lash line. A chalazion is a firm lump that can form when a meibomian gland becomes fully blocked. People with MGD may be more prone to chalazia.

Is MGD contagious?

No. MGD is a change in how your own glands work, so it can't be passed to anyone else.

Can I do warm compresses on my own?

Yes. Use gentle, comfortable warmth rather than anything hot, and keep it steady for several minutes. Your optometrist can suggest the best method and routine for your eyes.

Do contact lens wearers get MGD more often?

Long-term contact lens wear is associated with gland changes. If your lenses feel less comfortable than they used to, it's a good time to have your glands checked.

Curious how your glands are doing?

A detailed assessment, including meibography, lets you see your meibomian glands for yourself. Our optometrists will walk you through the images and what they mean for your eyes 🤍

Book an assessment

Réspa — Optometry & Dry Eye Wellness Centre
Room 1303, Hang Shing Building, 363–373 Nathan Road, Yau Ma Tei
11:00 AM – 7:00 PM · Closed Wednesday and Friday

About the author

Written by a registered optometrist at Réspa. Réspa was founded by three optometrists and focuses on comprehensive dry eye assessment and care, bringing evidence-based optometry together with a calm, wellness-focused experience.

References

  • Nichols KK, et al. The International Workshop on Meibomian Gland Dysfunction: Executive Summary. Investigative Ophthalmology & Visual Science, 2011.
  • Craig JP, et al. TFOS DEWS II Definition and Classification Report. The Ocular Surface, 2017.

This article is for general health information only and does not replace a professional eye examination. If you have any eye discomfort, please consult a registered optometrist or ophthalmologist.