Blepharitis: Causes and Its Impact on Eye Health

Proper management of different eye conditions, including blepharitis, typically requires medical attention and personalized treatment plans. At the Asian Eye Institute, experience state-of-the-art facilities and specialized eye care from professionals to alleviate your discomfort, prevent complications, and achieve lasting relief.

Blepharitis refers to chronic inflammation of the eyelids. It is often caused by bacterial infection or other related factors and can lead to redness, irritation, and itching. This condition can be understood as an ongoing irritation of the eyelid margins, where the eyelashes grow. It's a common condition that, while usually not sight-threatening, can be persistent and very bothersome, impacting daily comfort and vision quality.

This eyelid inflammation can result from various factors, often working in combination:
Bacterial Infection: Staphylococcus bacteria, commonly found on the skin, can overgrow on the eyelids, leading to inflammation.

• Malfunctioning Oil Glands (Meibomian Glands): Located within the eyelids, these glands produce oil that helps form the tear film. If they become clogged or inflamed (meibomian gland dysfunction or MGD), it can lead to blepharitis.
• Dry Eyes: Insufficient tear production or poor tear quality can exacerbate or contribute to blepharitis.
• Demodex Mites: Microscopic mites that naturally live on human skin and hair follicles can sometimes overpopulate the eyelash follicles, causing irritation and inflammation.
• Seborrheic Dermatitis: A skin condition that causes dandruff and oily skin can affect the eyelids, leading to flaky, greasy deposits.
• Allergies: Reactions to eye makeup, contact lens solutions, or environmental allergens can trigger eyelid inflammation.
• Rosacea: A chronic skin condition characterized by facial redness can also affect the eyelids, causing redness and thickening.

There are two main types of blepharitis: anterior blepharitis (affecting the outer eyelids) and posterior blepharitis (affecting the inner eyelids).

Anterior Blepharitis

This type affects the outer front edge of your eyelid where your eyelashes are attached. It is commonly caused by bacteria (staphylococcal blepharitis) or dandruff of the scalp and eyebrows (seborrheic blepharitis). Symptoms often include crusty eyelids, sticky lashes, and a gritty sensation.

Posterior Blepharitis

This type affects the inner edge of your eyelid, closest to your eye, where the meibomian glands are located. It's often associated with meibomian gland dysfunction (MGD), where the oil glands become clogged or don't produce enough quality oil. This can lead to an unstable tear film and dry eye symptoms.

Blepharitis symptoms can range from mild irritation to significant discomfort and visual disturbances. Because it's a chronic condition, symptoms often come and go. Common signs of this eyelid inflammation include:

• Red or irritated eyelids
• Itchy eyes or eyelids
• Burning or stinging sensation in the eyes
• Flaky or greasy scales/crusts around the eyelashes
• Eyelids that stick together, especially upon waking
• Gritty or foreign body sensation in the eye
• Excessive tearing or watery eyes
• Dry eyes
• Sensitivity to light (photophobia)
• Blurred vision, which may improve with blinking
• Loss of eyelashes (madarosis) or misdirected eyelashes (trichiasis)

Left untreated, blepharitis can lead to several uncomfortable and potentially more serious eyelid conditions, impacting both comfort and vision:

• Excessive Tearing or Dry Eyes: Blepharitis can disrupt the healthy tear film, leading to either watery eyes (due to irritation) or persistent dryness.
• Loss of Eyelashes: Chronic inflammation can damage hair follicles, causing eyelashes to fall out or grow abnormally.
• Stye or Chalazion: Blockage of an oil gland can lead to a red, tender lump (stye) or a firm, painless lump (chalazion) on the eyelid.
• Eyelid Scarring: In severe, long-term cases, the eyelid margins can become scarred or turn inward or outward.
• Chronic Pink Eye (Conjunctivitis): The inflammation can spread to the conjunctiva, causing persistent redness and irritation.
• Corneal Injury or Infection: Severe or untreated blepharitis can lead to inflammation or ulcers on the cornea, potentially affecting vision if left unaddressed.

Proper hygiene and simple self-care measures are appropriate treatments for many blepharitis symptoms. If your condition is not too severe, you may be recommended to wash your eyes and apply a warm compress. However, if these measures are insufficient, your doctor may recommend specialized medications.