What is the Difference Between Blepharitis and Conjunctivitis?

Blepharitis and conjunctivitis are both eye conditions that cause irritation and inflammation, but they affect different parts of the eye and have different causes. The main differences between the two are:

• Location: Blepharitis is an inflammation of the eyelids, while conjunctivitis is an inflammation of the conjunctiva, which is the thin layer that covers the white of the eye and the inner surface of the eyelids.
• Causes: Blepharitis is commonly caused by bacterial infections, particularly from Staphylococcus bacteria, or by skin conditions such as acne rosacea or scalp dandruff. Conjunctivitis, also known as "pink eye," is most commonly caused by viral or bacterial infections, allergic reactions, or environmental factors like overexposure to sun, wind, smog, chlorine, or contact lens solution.
• Symptoms: Both conditions may cause redness, itching, burning, light sensitivity, and thickening of the eyelids. However, conjunctivitis often produces a discharge or crust that can cause the eyelids to stick together during sleep.
• Treatment: Both conditions may be treated using antibiotics, depending on the cause. Blepharitis treatment also involves removing the source of irritation, such as cleaning the eyelids and maintaining proper hygiene. It is essential to consult a healthcare professional for proper diagnosis and treatment.

Comparative Table: Blepharitis vs Conjunctivitis

The main difference between blepharitis and conjunctivitis lies in the affected area of the eye. Here is a table highlighting the differences between the two conditions:

Both conditions share some common symptoms, such as redness in the eyes, swollen and itchy eyes, and dry eyes. If left untreated, both conditions can affect eyesight.