Demodex mites are microscopic, worm-like creatures that live on human skin, especially your face. While they sound unpleasant, for most people they are harmless. However, demodex mites can affect your eyes in a couple of ways:

Demodex and Eyelids:

• Habitat: Demodex mites, particularly Demodex folliculorum, favor areas around hair follicles. This makes your eyelids a prime spot for them, living at the base of your eyelashes.
• Overgrowth and Irritation: While usually present in small numbers, demodex mites can sometimes overgrow. This can trigger inflammation and irritation in the eyelids, leading to conditions like blepharitis.

Blepharitis Symptoms:

• If you have blepharitis caused by demodex mites, you might experience:
  • Redness and swelling of the eyelids
  • Itchiness and irritation
  • Crusting around the eyelashes
  • Burning sensation
  • Feeling like something is in your eye
  • Dry or watery eyes
  • Sometimes even blurry vision

How Mites Contribute to Blepharitis:

• The exact mechanism is still being researched, but here are some theories:
  • Waste Products: Demodex mites leave behind waste products that can irritate the eyelids.
  • Bacteria: The mites themselves might harbor bacteria that contribute to inflammation.
  • Immune Response: Your body’s immune response to the mites can lead to inflammation.

It’s important to note:

• Not everyone with demodex mites will develop blepharitis.
• Blepharitis can also have other causes besides demodex mites.
• If you experience any persistent eye problems, consult one of our doctors for advice!