What Are Chalazia?

What Causes the Lump and What is the Mechanism of Formation?

The lump is caused by the obstruction of a Meibomian gland, which normally secretes oil (meibum) onto the eye's surface to prevent tear evaporation. When the gland's opening becomes blocked, the oil builds up inside the gland, forming a dense, cyst-like nodule beneath the skin. This blockage is often linked to underlying conditions like chronic blepharitis or rosacea, which affect oil consistency. The initial blockage is often a stye (hordeolum), which then becomes a non-infectious, chronic lump.

What Symptoms are Associated with Chalazion Development and What is the Difference from a Stye?

Symptoms are associated with local swelling and minor discomfort. The lump is typically firm, tender to the touch, and grows slowly over several days or weeks. Unlike a stye, which is an acute, painful, and often infectious bump that occurs right at the edge of the eyelid, a chalazion is usually less painful and located deeper within the eyelid. A large chalazion can sometimes press on the eyeball, causing temporary visual blurriness or distortion. This visual change is the primary functional symptom experienced by patients.

How is a Chalazion Diagnosed and Treated?

Diagnosis is usually made clinically, based on the chalazion's firm, non-tender location away from the eyelid edge. Treatment typically begins with conservative methods. Warm compresses applied multiple times a day help melt the hardened oil inside the gland, encouraging natural drainage. If the chalazion persists, the doctor may inject a corticosteroid to reduce inflammation, or perform a minor surgical drainage procedure.

How Does This Condition Impact Vision or Eye Health?

A large chalazion impacts vision by mechanically pressing on the cornea, which is the eye's front surface. This pressure can temporarily change the cornea's curvature, inducing mild astigmatism that causes blurry or distorted vision. The distortion resolves once the chalazion is treated and removed.

What are the Necessary Preventative Measures?

Necessary preventative measures focus on maintaining eyelid hygiene. Regularly cleaning the eyelids with specialized washes or diluted baby shampoo, and using warm compresses nightly, helps keep the Meibomian glands clear and prevents blockage.