Question 1

Which of the following best describes the function of the sclera in the eye?

Accepted Answer

It acts as a protective covering, maintains the shape of the eyeball, and serves as an anchor for extrinsic eye muscles.

Question 2

A patient presents with clouded, blurred vision due to thickening and hardening of the lens. Which pathology is most likely responsible for these symptoms?

Accepted Answer

Cataracts

Question 3

Which structure is responsible for draining aqueous humor from the anterior cavity of the eye into the bloodstream?

Accepted Answer

Scleral venous sinus (canal of Schlemm)

Question 4

What is the primary function of the choroid in the vascular tunic of the eye?

Accepted Answer

To absorb light rays and supply blood to the retina

Question 5

Which of the following best explains why the optic disc is known as the 'blind spot'?

Accepted Answer

It lacks photoreceptor cells because it is where the optic nerve exits the eye.

Question 6

A blockage in the scleral venous sinus would most likely result in which of the following conditions?

Accepted Answer

Glaucoma

Question 7

Which of the following correctly matches the eye structure with its function?

Accepted Answer

Lens – changes shape to focus light on the retina

Question 8

Which layer of the retina is responsible for absorbing stray light and storing Vitamin A?

Accepted Answer

Outer pigmented layer

Question 9

During an eye exam, a patient is found to have increased intraocular pressure that is damaging the optic nerve. Which of the following best explains the underlying mechanism?

Accepted Answer

Blockage of aqueous humor drainage through the scleral venous sinus

Question 10

Which of the following best describes the role of the ciliary muscle in vision?

Accepted Answer

It alters the shape of the lens to focus light on the retina.

Question 11

Which of the following is TRUE regarding the humors of the eye?

Accepted Answer

Vitreous humor is a gel-like substance that helps maintain the shape of the eyeball and is primarily formed before birth.

Question 12

Which of the following best describes the sequence of neural signal transmission in the retina?

Accepted Answer

Photoreceptors → Bipolar cells → Ganglion cells

Question 13

A patient with damage to the fovea centralis would most likely experience which of the following symptoms?

Accepted Answer

Loss of sharp, central vision (highest visual acuity)

Question 14

Which of the following equations best represents the relationship between intraocular pressure ($$P$$), aqueous humor production rate ($$Q_{in}$$), and outflow resistance ($$R$$)?

Accepted Answer

$$P = Q_{in} 	imes R$$

Question 15

Which of the following best explains why the cornea is transparent?

Accepted Answer

It is composed of two avascular epithelial layers that allow light to pass through.

Question 16

Which of the following structures contains smooth muscle that controls the size of the pupil?

Accepted Answer

Iris

Question 17

Which of the following is a function of the aqueous humor?

Accepted Answer

It nourishes the avascular lens and cornea.

Question 18

Which of the following best describes the role of amacrine and horizontal cells in the retina?

Accepted Answer

They modify and integrate electrical signals between other retinal neurons.

Question 19

A patient with a blockage in the canal of Schlemm is at risk for which of the following complications if left untreated?

Accepted Answer

Increased intraocular pressure leading to optic nerve damage (glaucoma)

Question 20

Which of the following best describes the function of the suspensory ligaments (ciliary zonules)?

Accepted Answer

They hold the lens in place and transmit tension from the ciliary muscle to the lens.

Special Senses: Vision – Anatomy and Physiology of the Eye

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