A chalazion and a hordeolum are both bumps on the eyelid. A hordeolum, also called a stye, is caused by bacterial infection, while a chalazion results from an obstructed gland. Knowing whether you ...

What are the symptoms of a stye? What people typically call a “stye” is what ophthalmologists know as either a chalazion or a hordeolum. While these terms both sound like something you'd catch ...

Here are eight causes of eye swelling: 1. Hordeolum (AKA stye) A hordeolum is the medical term for a very common eye ailment –– a stye. "At the base of the eyelashes are oil glands called ...