What eyelid lesion is described as a small yellowish pustule at the base of an eyelash?

• A. Stye.
• B. Chalazion.
• C. Hyphema.
• D. Retinal detachment.

Answer: (A)

A stye is an acute infection at the eyelid margin, usually involving a lash follicle or nearby gland, which classically presents as a tender, swollen lump with a small yellowish pus-filled point at the base of a lash. That yellow pustule precisely reflects purulent material accumulating where the lash attaches, which is the hallmark of an external hordeolum. This contrasts with a chalazion, which is a chronic, painless, firm nodule within the eyelid away from the lash line due to a blocked meibomian gland, not a pustule. Hyphema is blood collecting in the anterior chamber inside the eye, not a lid lesion, and retinal detachment involves the retina with symptoms like sudden vision changes, not a lump on the eyelid. So the described lesion fits an external stye best.