Definition & Etiology

Definition

A meibomian cyst (chalazion): chronic, non-infectious blockage of the meibomian gland away from the eyelid margin

Stye (hordeolum): localised infection/inflammation on the eyelid margin due to staphylococcal infection

Etiology

Chalazion: blocked meibomian gland Stye: staphylococcal infection can be:

• Internal: meibomian gland
• External: hair follicles