Question 1

Which of the following is NOT a characteristic of special senses?

Accepted Answer

They are scattered throughout the body.

Question 2

A patient presents with a bacterial infection at the base of their eyelash. What is the most likely diagnosis?

Accepted Answer

Stye

Question 3

Which enzyme found in lacrimal fluid is responsible for attacking bacterial cell walls?

Accepted Answer

Lysozyme

Question 4

Which structure is responsible for producing aqueous humor in the eye?

Accepted Answer

Ciliary process

Question 5

A patient with excessive intraocular pressure is at risk for which condition?

Accepted Answer

Glaucoma

Question 6

Which of the following is TRUE regarding corneal transplants?

Accepted Answer

They are highly successful because the cornea is avascular.

Question 7

Which of the following best describes the function of the ciliary muscle?

Accepted Answer

It alters the shape of the lens for focusing light.

Question 8

Which tunic of the eye contains the scleral venous sinus (Canal of Schlemm)?

Accepted Answer

Fibrous tunic

Question 9

A patient is diagnosed with cataracts. Which of the following is the most likely cause?

Accepted Answer

Loss of transparency in the lens due to aging, injury, or UV exposure.

Question 10

Which of the following formulas correctly represents the calculation of intraocular pressure (IOP) if the force exerted by aqueous humor is $$F$$ and the area of the cornea is $$A$$?

Accepted Answer

$$IOP = \frac{F}{A}$$

Question 11

Which of the following is NOT a component of the tear film?

Accepted Answer

Protein layer

Question 12

Which extrinsic eye muscle is responsible for moving the eye upward?

Accepted Answer

Superior rectus

Question 13

Which of the following statements about rods and cones is correct?

Accepted Answer

Rods are responsible for vision in dim light and cones for color vision in bright light.

Question 14

A patient with complete absence of red or green cones is most likely to experience which condition?

Accepted Answer

Colorblindness

Question 15

Which of the following best describes the neural pathway for vision?

Accepted Answer

Axons of ganglion cells exit the eye via the optic nerve and half cross over to the opposite side of the brain.

Question 16

Which of the following is a reason why corneal transplants are less likely to be rejected?

Accepted Answer

The cornea is avascular, so antibodies do not circulate there.

Question 17

Which of the following is the correct sequence for the flow of aqueous humor?

Accepted Answer

Ciliary process → Lens → Anterior chamber → Scleral venous sinus

Question 18

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

Accepted Answer

It is avascular and composed of crystallins.

Question 19

Which of the following best explains why a person with glaucoma may experience blindness?

Accepted Answer

Excessive intraocular pressure damages the retina and optic nerve.

Question 20

Which formula best represents the relationship between the focal length $$f of $$the lens, the object distance $$d_o$$, and the image distance $$d_i in $$the eye?

Accepted Answer

$$\frac{1}{f} = \frac{1}{d_o} + \frac{1}{d_i}$$

Special Senses: Anatomy and Physiology of the Eye and Vision

Study Guide - Practice Questions

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