JCAHPO Ocular Anatomy & Physiology

Question 1

Which layer of the cornea is responsible for maintaining corneal clarity and regulates fluid transport through active pumping?

Accepted Answer

Endothelium

Answer

The corneal endothelium maintains corneal transparency by actively pumping fluid out of the stroma; loss of endothelial cells leads to corneal edema.

Question 2

The fovea centralis is located in which region of the retina?

Accepted Answer

Macula lutea

Answer

The fovea centralis is the central depression within the macula lutea that contains the highest concentration of cone photoreceptors for maximum visual acuity.

Question 3

Which structure produces the aqueous humor that fills the anterior and posterior chambers of the eye?

Accepted Answer

Ciliary body

Answer

The ciliary body's epithelium produces aqueous humor, which flows from the posterior chamber through the pupil into the anterior chamber.

Question 4

The optic nerve is formed by axons of which retinal cells?

Accepted Answer

Ganglion cells

Answer

Retinal ganglion cell axons converge at the optic disc and exit the eye as the optic nerve, transmitting visual information to the brain.

Question 5

What is the primary function of the vitreous humor?

Accepted Answer

Maintaining intraocular pressure and eye shape

Answer

The vitreous humor is a gel-like substance filling the posterior segment that provides structural support to maintain the eye's spherical shape.

(JCAHPO) International Joint Commission Allied Health Personnel in Ophthalmology Practice Test

(JCAHPO) International Joint Commission Allied Health Personnel in Ophthalmology Practice Test

JCAHPO Ocular Anatomy & Physiology