Overview
Blepharitis is a common, usually non-contagious condition that causes chronic inflammation of the eyelid margins. It affects people of all ages and is often associated with bacterial overgrowth, meibomian gland dysfunction, rosacea, or seborrheic dermatitis. The eyelids contain meibomian glands that produce oils essential for a healthy tear film. When these glands become inflamed or blocked, the oils thicken and do not flow properly, leading to irritation and evaporative dry eye. Blepharitis alone rarely causes permanent vision loss, but severe or untreated cases may affect the cornea.
Symptoms
Symptoms may vary in severity and can come and go over time. Common symptoms include crusting or flakes on the eyelashes, especially upon waking, red or swollen eyelids, itching or burning, a gritty or foreign-body sensation, excessive tearing or dry eye, blurred or fluctuating vision, light sensitivity, and loss or misdirection of eyelashes.
Types of Blepharitis
Blepharitis is commonly divided into anterior and posterior types, and many patients have features of both. Anterior blepharitis affects the front edge of the eyelid near the eyelashes and is most often caused by bacteria or dandruff of the scalp and eyebrows. Less commonly, it may be related to allergies or eyelash mite infestation. Posterior blepharitis, also known as meibomian gland dysfunction, affects the oil glands along the eyelid margin. Thickened oil secretions block normal gland flow, leading to chronic inflammation, redness, lid thickening, and dry eye. This form is frequently associated with rosacea.
Causes and Risk Factors
Blepharitis can develop due to bacterial overgrowth, seborrheic dermatitis, rosacea, blocked oil glands, allergies, eyelash mites, oily skin, diabetes, aging, poor eyelid hygiene, or exposure to environmental irritants such as smoke and dust.
Daily Eyelid Hygiene
Blepharitis is a chronic condition but can usually be controlled with consistent treatment. The foundation of care is daily eyelid hygiene. Warm compresses applied for five to ten minutes help loosen debris and soften oil secretions. Gentle eyelid massage after heat encourages oil flow from the meibomian glands. Eyelids and eyelashes should then be cleaned using diluted baby shampoo or a commercial lid cleanser.
Additional Treatments
Additional treatments may include preservative-free artificial tears and lubricating ointments to relieve dryness and irritation. Antibiotic eye drops or ointments may be prescribed, and short courses of steroid drops may be used during flare-ups under close medical supervision. Oral antibiotics are sometimes used for posterior blepharitis or rosacea-related disease. Newer therapies include hypochlorous acid lid sprays for bacterial control, tea tree oil–based or prescription treatments for eyelash mites, and prescription anti-inflammatory dry eye medications when indicated.
In-Office Therapies
In-office treatments are now available for certain patients and may include thermal pulsation therapy to improve meibomian gland function and intense pulsed light therapy for meibomian gland dysfunction and rosacea-associated blepharitis.
Supportive Measures
Supportive measures include limiting or avoiding eye makeup, removing makeup nightly, temporarily discontinuing contact lenses during flare-ups, avoiding smoke and dusty environments, and considering omega-3 fatty acid supplementation after discussing it with your physician.
Prognosis and Possible Complications
With proper care, most patients experience improvement in symptoms, although blepharitis often returns when treatment is stopped. The condition is rarely serious, but untreated or severe cases may lead to styes, chalazia, chronic dry eye, conjunctivitis, eyelid scarring or notching, eyelash loss, or, rarely, corneal inflammation or ulceration.
Long-Term Management
Daily eyelid hygiene, management of scalp and skin conditions, and regular eye examinations are important for long-term control. Contact your eye care provider if symptoms worsen or fail to improve after several days of consistent treatment.