Certified Paraoptometric (CPO) Practice Exam 2025

Which term is associated with the optical nerve head?

1. Path

2. Papill

3. Sclera

4. Ton

The correct answer is: Papill

The correct term associated with the optical nerve head is "Papill." The optic nerve head, also known as the optic disc, is the point in the retina where the optic nerve fibers exit the eye. "Papill" is derived from the Latin word for "nipple," referring to the raised appearance of the optic nerve head as it protrudes into the eye. This term is commonly used in ophthalmology to describe various conditions or observations related to the optic nerve head, including papilledema, which indicates swelling of the optic disc due to increased intracranial pressure. The other terms listed do not specifically relate to the optic nerve head. "Path" generally refers to a route or course, "Sclera" is the white outer layer of the eyeball, and "Ton" could refer to tonometry, a test measuring intraocular pressure, but does not connect directly to the optic nerve head.