Blepharitis is a chronic inflammatory condition affecting the eyelid margins and is a frequent finding during comprehensive eye exams. Although it is rarely sight-threatening, patients often ask whether blepharitis can cause permanent vision damage. Knowing the risks associated with untreated blepharitis highlights the importance of proper diagnosis and ongoing management.

What Is Blepharitis?

Blepharitis is inflammation of the eyelid margins, usually caused by bacteria, clogged oil glands, skin conditions like rosacea, or an imbalance of the normal bacteria that live on the skin. It often comes and goes, and many people manage symptoms for years. While blepharitis itself is not contagious or usually sight-threatening, chronic inflammation can disrupt the delicate surface of the eye.

Can Blepharitis Affect Vision?

Blepharitis does not typically cause permanent vision loss on its own, but it can contribute to conditions that temporarily or, in rare cases, more seriously affect vision if left untreated.

Possible vision-related effects include:

• Dry Eye Disease: Inflamed or clogged oil glands can prevent tears from staying on the eye’s surface. This can lead to blurry vision that fluctuates throughout the day, especially during screen use or reading.

• Corneal Irritation or Damage: In severe or unmanaged cases, chronic inflammation can irritate the cornea (the clear front surface of the eye). Repeated irritation may cause corneal inflammation or small abrasions, which can impact vision and comfort.

• Recurrent Styes or Chalazia: Blepharitis increases the risk of frequent styes and chalazia. While these usually don’t damage vision permanently, repeated infections can cause eyelid scarring or changes in tear distribution.

• Secondary Infections: In rare cases, ongoing inflammation can make the eye more vulnerable to infections that may affect the cornea. If not treated promptly, these infections can pose a greater risk to vision.

How Is Blepharitis Managed?

While blepharitis is often chronic, it is very manageable with the right care plan. Treatment may include:

• Daily eyelid hygiene routines

• Warm compresses to improve oil gland function

• Prescription eye drops or ointments when needed

• Treatment for underlying conditions like rosacea or dry eye

Early and consistent treatment significantly reduces the risk of long-term problems.

Take the Next Step at Palo Alto Eyes Optometry

Blepharitis alone rarely causes permanent vision damage, but ignoring ongoing symptoms can lead to complications that affect eye comfort and visual clarity. The key to protecting your vision is early diagnosis, proper treatment, and ongoing management. With professional care and a personalized treatment plan, most patients maintain healthy vision and long-term comfort.

If you’re experiencing symptoms of blepharitis, schedule an eye exam at Palo Alto Eyes Optometry to identify the cause of your symptoms and create a treatment plan designed to protect your eye health. Visit our office in Palo Alto, California, or call (650) 321-2015 today.