Blepharitis: causes, treatment, and symptoms
Blepharitis is one of the most common eye disorders and is often the underlying cause of eye discomfort. It is characterized by inflammation of the eyelid margins and usually causes redness of the eyes, along with itching and irritation of the eyelids, typically in both eyes. The appearance of blepharitis is often confused with conjunctivitis, and due to its recurring nature, it is the most common cause of recurrent conjunctivitis in older people. Due to the gritty sensation associated with blepharitis, many patients mistakenly believe they have dry eye syndrome — although lubricating drops often provide little to no improvement in the condition. Blepharitis is a chronic condition, meaning it persists as an ongoing issue.


Everyone has bacteria on the surface of their skin, but for some people, bacteria especially thrive on the area at the base of the eyelashes and eyelid margins. Excessive amounts of these bacteria can cause dandruff-like scales and particles to form on the skin. Blepharitis is also associated with meibomitis, which is a dysfunction and inflammation of the nearby oil glands of the eyelids, known as the meibomian glands. When functioning normally, these glands secrete a thin, oily coating into the natural tear film, which helps prevent rapid evaporation and keeps the eyes moist.


