Meibomian Gland Dysfunction: The Leading Cause of Dry Eye Disease

Meibomian gland function naturally declines as we age, making MGD increasingly common in older adults. Hormonal fluctuations play a particularly significant role, especially in women. Menopause, pregnancy, and the use of hormone replacement therapy can all alter both the quantity and quality of meibum production, increasing susceptibility to gland dysfunction.

Modern life introduces several challenges to healthy gland function. Extended use of computers, tablets, and smartphones significantly reduces your blink rate, sometimes by more than half. Incomplete or infrequent blinking prevents the mechanical action needed to express oil from the glands, leading to stagnation and blockage.

Environmental conditions worsen symptoms considerably. Dry climates, wind, air conditioning, and heating systems all accelerate tear evaporation. Contact lens wear can disrupt the tear film and irritate the eyelid margins over time. Poor makeup hygiene, particularly applying eyeliner to the inner waterline of the eyelid or failing to remove eye makeup thoroughly each night, can directly clog gland openings.

Several systemic health conditions strongly correlate with MGD. Skin conditions, particularly acne rosacea, frequently occur alongside meibomian gland problems. Autoimmune diseases including Sjogren syndrome, rheumatoid arthritis, and lupus can affect gland function as part of their broader impact on moisture-producing glands throughout the body.

Many common medications contribute to dry eye and MGD by reducing tear production or altering tear composition. These include antihistamines, antidepressants, blood pressure medications, and isotretinoin (commonly known as Accutane). If you take any of these medications, monitoring your eye health becomes especially important.

Blepharitis is a general term meaning eyelid inflammation, while MGD refers specifically to dysfunction of the meibomian glands. MGD is actually the most common underlying cause of blepharitis symptoms, and the two conditions frequently occur together. Treatment approaches overlap considerably, as both benefit from lid hygiene, warm compresses, and anti-inflammatory therapies.

Yes, people with MGD are much more prone to developing chalazia and styes. A chalazion forms when a meibomian gland becomes completely blocked, causing a firm, usually painless lump within the eyelid. The chronic inflammation and gland dysfunction in MGD creates the perfect environment for these blockages to form, often repeatedly. Treating the underlying MGD usually reduces the frequency of these troublesome bumps.

Absolutely. We now know that any surgery on the eye, including cataract surgery and LASIK, can temporarily worsen existing dry eye or MGD. Untreated dry eye at the time of surgery can lead to slower healing, more discomfort, and even poorer visual outcomes. Current best practices call for evaluating and optimizing the ocular surface before proceeding with elective eye surgery to ensure the best possible results and comfort during recovery.

The answer depends on the stage of disease. Glands that have completely atrophied and disappeared cannot regenerate. However, glands that are blocked or inflamed but still structurally intact can often recover significant function with appropriate treatment. This is why early diagnosis and intervention are so critical. Starting treatment before permanent gland loss occurs gives you the best chance of preserving long-term gland health and controlling symptoms.

If you have been diagnosed with MGD or chronic dry eye, we typically recommend follow-up evaluations every 6 to 12 months, or more frequently if symptoms change or worsen. Regular monitoring with meibography and other diagnostic tests allows us to track your gland health over time, assess your response to treatment, and adjust your management plan as needed to maintain comfort and prevent progression.