CPOA Ocular Anatomy 3

Question 1

What is the primary function of the retinal pigment epithelium (RPE)?

Accepted Answer

Absorbing scattered light and supporting photoreceptors

Answer

The RPE absorbs excess light, recycles visual pigments, and provides metabolic support to the overlying photoreceptors.

Question 2

Which structure separates the anterior chamber from the posterior chamber of the eye?

Accepted Answer

Iris

Answer

The iris acts as a diaphragm dividing the anterior and posterior chambers, with the pupil as the opening between them.

Question 3

The zonules of Zinn connect the lens to which structure?

Accepted Answer

Ciliary body

Answer

The zonular fibers (suspensory ligaments) extend from the ciliary body to the lens equator, holding the lens in position and transmitting ciliary muscle forces.

Question 4

Which layer of the retina contains the cell bodies of rod and cone photoreceptors?

Accepted Answer

Outer nuclear layer

Answer

The outer nuclear layer contains the nuclei (cell bodies) of the rod and cone photoreceptors.

Question 5

What is the approximate horizontal diameter of a normal adult cornea?

Accepted Answer

11–12 mm

Answer

The average adult cornea measures approximately 11–12 mm horizontally and 10–11 mm vertically.

(CPOA) Certified Paraoptometric Assistant Practice Test

(CPOA) Certified Paraoptometric Assistant Practice Test

CPOA Ocular Anatomy 3