Blocked Meibomian glands: MGD, dry eyes, and fluctuating vision

At CARE Clinic, the optometrist assesses Meibomian gland function (oil quality, blockage, damaged glands) and then discusses treatments according to your case: manual gland expression, OptiLight IPL, iLux, or home care routines.

Understanding the condition

What are Meibomian glands for?

Tears are not only made of water. They contain a thin layer of oil that helps keep the eye surface smooth and comfortable.

The Meibomian glands, located in the eyelids, produce this oil. If it becomes too thick, flows poorly, or if the number of glands decreases over time, tears may break up quickly — this is known as Meibomian gland dysfunction (MGD)The optometrist examines the eyelids, the Meibomian glands, tear quality, and the surface of the eye. The next steps are then tailored to what is observed.

MGD is now considered the most common cause of evaporative dry eye in adults.

"The result may feel like dry eyes: burning, sandy sensation, reflex tearing, or blurry vision that clears after a blink."
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Our approach

Check if tears evaporate too quickly

Observer

Examining Oil Release from Glands

The optometrist observes the eyelid margin, the appearance of the glands, and the stability of tears between blinks.

Comprendre

Identifying Aggravating Factors

The optometrist checks if blepharitis, rosacea, screens, contact lenses, the environment, or certain medications contribute to your case.

Adapter

Deciding on the Next Step

Treatment is discussed based on the condition of the eyelids, tear film, your symptoms, and any potential contraindications.

Symptômes

How MGD feels in daily life

MGD doesn’t always present the same signs. Symptoms may vary with screens, wind, contact lenses, or at the end of the day.

01

Burning or stinging

A burning or stinging sensation appears when tears evaporate too quickly, especially in front of a screen or at the end of the day.

02

Fluctuating vision

Vision that blurs and then clears after blinking often indicates unstable tears.

03

Gritty feeling

A gritty feeling in the eye can accompany irritation of the surface or edge of the eyelids.

Other frequently reported signs

Reflex tearing

The eye can water in response to an irritated surface, even when the problem stems from too rapid evaporation.

Heavy or sticky eyelids

The eyelid margins may feel thicker, sensitive, or sticky upon waking.

Redness of the eyelid margin

Redness near the eyelashes may accompany inflammation or associated blepharitis.

Screen Discomfort

When using a screen, we blink less often, which makes symptoms more noticeable during reading or close-up work.

Poorly tolerated lenses

Contact lenses become less comfortable when tears lack stability.

If burning, fluctuating vision, or tearing persists despite drops, the optometrist may check if the eyelids and Meibomian glands are contributing to the symptoms.

Schedule my evaluation

"

Meibomian glands are not just about a clogged gland. The optometrist observes whether the oil from the tears is released properly, if the eyelids are irritated, and whether the ocular surface remains stable.

Dr. Francesca Olinga, optometrist

Overview

What the optometrist observes during the exam

Two people with similar symptoms may have very different gland conditions. These indicators show what the optometrist looks for before discussing next steps.

How to use these indicators

Four indicators to guide the evaluation

These indicators describe what can be observed: thicker secretions, obstructions, loss of glands, or associated inflammation.

01

Secretion

Thicker oil

The oil produced by the glands may become less fluid and harder to express.

Signs

Thicker discharge upon expression

Tear film that breaks down faster

Symptoms often more noticeable by the end of the day

02

Obstruction

Blocked gland openings

The small openings at the eyelid margin may be blocked or less visible.

Signs

Less open gland openings

Irregular eyelid margins

Possible chalazia if a gland becomes blocked

03

Structure

Less visible glands

Imaging may show areas where the glands are less dense or fewer in number.

Signs

Shortened or less visible glands

Symptoms sometimes discordant with the appearance

Helpful follow-up to compare progress

04

Context

Associated inflammation

Rosacea, blepharitis, or Demodex may contribute to irritation of the eyelid margins.

Signs

Reddish eyelid margins

Deposits or crusts near the lashes

Possible context of ocular rosacea or blepharitis

Why tears become unstable

Comprendre ce qui se passe entre deux clignements

01

The glands produce oil that is thicker, less abundant, or harder to expel.

02

The oily layer provides less protection to the eye's surface between blinks.

03

Friction, redness, watery eyes, or fluctuating vision perpetuate inflammation of the eyelid margins.

Causes

Why glands become blocked or drain poorly

Meibomian glands can produce thicker oil, release it less easily, or diminish in number as obstruction becomes chronic. The eyelid margin may also be inflamed, irritating the eye surface and enhancing discomfort.

MGD often coexists with posterior blepharitis, ocular rosacea, a dry eye or episodes of chalazion. The optometrist looks for what exacerbates symptoms based on your profile — chronic inflammation, Demodex, prolonged contact lens wear, screens, dry environments, or hormonal changes.

Perspective

MGD is often chronic and fluctuating. Clinic follow-up aims to stabilize tears, reduce eyelid irritation, and adjust treatment as needed.

Can MGD come back?

Symptoms may improve and then recur, especially when triggering factors persist: screens, dry air, contact lenses, rosacea, blepharitis, or eyelid inflammation.

Clinic follow-ups allow us to check whether the discussed actions or treatments are still helpful, or if other options should be considered based on the progression.

When to have the eyelids and tears evaluated

An evaluation is helpful when symptoms persist, frequently return, or interfere with screens, contact lenses, driving, or reading.

  • Loss of vision or very blurry vision

    A sudden loss of vision or very blurry vision that doesn't clear up with blinking warrants a prompt evaluation.

    Urgent

  • Significant pain or severe light sensitivity

    Significant eye pain or eyes very sensitive to light warrant a rapid evaluation — these signs may indicate something other than AMD.

    Urgent

  • Marked redness in one eye

    Intense redness in one eye warrants a rapid evaluation.

    Urgent

  • Contact Lenses with Pain or Redness

    Immediately remove contact lenses and seek immediate medical attention if the eye becomes red and painful: risk of infection or corneal damage.

    Immediat

  • Purulent discharge or very swollen eyelid

    Abundant purulent discharge or a very swollen eyelid requires prompt evaluation.

    Urgent

  • What can be done if the glands become blocked?

    The optometrist checks if the eyelids, tear oil, or inflammation are contributing to the symptoms.

    Ce que chaque approche vise

    Each step addresses a different sign

    Heat, cleaning, expression, or light do not target exactly the same problem. The discussion will depend on what is observed and what bothers you the most.

    Schedule an assessment
    FAQ

    When should I seek prompt attention?

    Consult promptly if there is significant pain, vision loss, severe sensitivity to light, trauma, marked redness in one eye, or pain with lenses.

    Why talk about eyelid hygiene if the problem comes from the glands?

    The eyelid margins influence the environment of the glands. When debris, blepharitis, or Demodex seem to contribute, eyelid hygiene treatment may be discussed.

    What is the difference between iLux and gland expression?

    iLux combines controlled heat and gentle gland expression. Manual gland expression also aims to release thickened secretions when the optometrist observes an obstruction.

    The choice depends on what is observed during the exam.

    Is IPL suitable for all MGD?

    No. OptiLight IPL is mainly discussed when the optometrist observes that the eyelid glands are functioning poorly, or in the presence of associated inflammation. It is only proposed after checking for contraindications: active rosacea, certain skin conditions, or pregnancy.

    Can MGD be chronic?

    Yes. MGD is often chronic and fluctuates. Follow-up in the clinic aims to better manage the symptoms and factors that trigger flare-ups.

    How do I know if my glands are blocked?

    Symptoms alone are not enough to confirm MGD. The optometrist observes the eyelid margins, the appearance of secretions, and, when available, infrared imaging of the glands.

    Is it the same as dry eye?

    No. MGD is a common cause of evaporative dryness, but it does not explain all cases of dry eyes.

    The optometrist checks if the problem primarily stems from the glands, a lack of tears, inflammation, or another cause.

    What is MGD?

    MGD stands for Meibomian gland dysfunction. These glands produce the thin layer of oil that covers the tears.

    When they are not functioning well, tears can evaporate too quickly, and dryness symptoms can increase.

    Who examines your eyelids and tears at CARE Clinic

    Dre Francesca Olinga, optométriste à Experience Care, portrait détouré
    Dre. Francesca Olinga
    Optometrist

    An optometrist and founder of the CARE Clinic, Dr. Francesca Olinga understands dry eye because she has experienced it. Experienced in the management of complex cases (neuropathic pain, demodex, chalazions), she uses innovation and attentive listening to guide you toward improved eye comfort.

    Dre Trang Nguyen, optométriste à Experience Care, portrait détouré
    Dr. Trang Nguyen
    Optometrist

    Optometrist with over 30 years of experience and speaker for eye care professionals. Dr. Nguyen has experience in improving visual quality affected by dry eye. She supports her patients in reconciling their aesthetic goals (makeup, cosmetics) and optimal eye comfort.

    Dr Daniel Nguyen, optométriste à Experience Care, portrait détouré
    Dr Daniel Nguyen
    Optometrist

    An optometrist and member of theOOQ, Dr. Daniel Nguyen splits his practice between eye exams in an optometry clinic and advanced management of dry eye conditions at the CARE Clinic. This dual practice provides him with a comprehensive view of his patients' visual health, from routine screenings to cutting-edge therapeutic protocols. dry eye Biography of Karine Charbonneau