Final answer:
Based on the description of a growing, painless bump on the eyelid, the nurse practitioner likely suspects a chalazion, a blocked oil gland that can enlarge but typically does not affect vision.
Step-by-step explanation:
The scenario described suggests that the patient has a small, painless bump on her eyelid that has been growing over the past weeks. Considering the absence of pain, change in vision, and steady growth, the nurse practitioner is likely to suspect a chalazion. A chalazion is a blocked oil gland that leads to a swelling or lump on the eyelid. Comparatively, a hordeolum (sty) is usually painful, a pinguecula presents as a yellowish bump on the white of the eye, and a pterygium is a growth that can eventually affect vision. The patient's description most closely matches the characteristics of a chalazion, which can grow larger and become noticeable over time but typically doesn't affect vision.