Which of the following is a staphylococcal infection characterized by a localized red swollen and acutely tender abscess of the upper or lower eyelid?

A hordeolum, commonly referred to as a stye, is a staphylococcal infection that leads to the formation of an abscess in the eyelid glands. The infection results in a localized, red, swollen, and acutely tender area on the upper or lower eyelid. This condition is typically caused by the obstruction and subsequent infection of the eyelid's sebaceous glands, most notably the glands of Zeis or the meibomian glands, by Staphylococcus bacteria.

The acute tenderness and redness associated with a hordeolum are key clinical features, setting it apart from other eyelid conditions. Uveitis, on the other hand, refers to inflammation of the uvea, which does not present with an abscess or localized swelling of the eyelid. A chalazion is a cyst formed from a blocked oil gland, which may appear similar but is usually non-tender and does not involve infection. Dacryocystitis involves inflammation of the tear sac often due to infection but does not specifically involve the eyelid tissue in the same acute manner as a hordeolum. Thus, a hordeolum stands out as the condition defined by an acutely infected and tender abs