CPOA Basic Science 3

Question 1

The nasolacrimal duct drains tears into which anatomical location?

Accepted Answer

Inferior meatus of the nasal cavity

Answer

The nasolacrimal duct empties tears into the inferior meatus of the nasal cavity, explaining why crying causes nasal congestion.

Question 2

What is the normal intraocular pressure (IOP) range in a healthy adult?

Accepted Answer

10–21 mmHg

Answer

Normal IOP ranges from 10 to 21 mmHg; pressures consistently above 21 mmHg may indicate ocular hypertension or glaucoma risk.

Question 3

The optic nerve exits the eye through which structure?

Accepted Answer

Optic disc

Answer

The optic disc (optic nerve head) is where the optic nerve fibers exit the globe; it contains no photoreceptors, creating the physiological blind spot.

Question 4

Which layer of the tear film is produced by the meibomian glands?

Accepted Answer

Lipid layer

Answer

The meibomian (tarsal) glands secrete the outermost lipid layer of the tear film, which reduces evaporation of the aqueous layer.

Question 5

Snellen visual acuity of 20/40 means the patient can see at 20 feet what a person with normal vision can see at:

Accepted Answer

40 feet

Answer

20/40 means the patient must be at 20 feet to see what a normally sighted person can see at 40 feet, indicating reduced acuity.

(CPOA) Certified Paraoptometric Assistant Practice Test

(CPOA) Certified Paraoptometric Assistant Practice Test

CPOA Basic Science 3