Question 1

Which of the following is NOT considered one of the special senses?

Accepted Answer

Touch

Question 2

The fibrous tunic of the eye consists of which two main structures?

Accepted Answer

Cornea and sclera

Question 3

What is the primary function of the cornea in the eye?

Accepted Answer

Focusing light by refraction

Question 4

Which layer of the eye contains melanocytes and blood vessels that nourish the retina?

Accepted Answer

Vascular tunic (choroid)

Question 5

Why are corneal transplants generally successful?

Accepted Answer

The cornea lacks blood vessels, reducing immune response

Question 6

Which equation best describes the refraction of light as it passes from air into the cornea?

Accepted Answer

$$n_1$$ \sin \$$theta_1$$ = $$n_2$$ \sin \$$theta_2$$

Question 7

A patient presents with increased intraocular pressure due to blockage of aqueous humor drainage. What condition is most likely?

Accepted Answer

Glaucoma

Question 8

Which structure is responsible for changing the shape of the lens to focus light on the retina?

Accepted Answer

Ciliary muscle

Question 9

During bright light conditions, which muscle fibers of the iris contract to constrict the pupil?

Accepted Answer

Circular muscle fibers

Question 10

Which of the following best explains why the cornea is nourished by tears and aqueous humor rather than blood vessels?

Accepted Answer

Blood vessels would block light passage

Question 11

If the ciliary muscle contracts, what happens to the lens and vision?

Accepted Answer

Lens thickens, near vision improves

Question 12

Which of the following is a function of the sclera?

Accepted Answer

Provides shape and structural support

Question 13

Which layer of the eye contains the photoreceptors responsible for vision?

Accepted Answer

Nervous tunic (retina)

Question 14

What is the main function of the suspensory ligaments in the eye?

Accepted Answer

Attach the lens to the ciliary processes

Question 15

Which of the following is TRUE regarding the cornea?

Accepted Answer

It is transparent and avascular

Question 16

Which process allows both eyes to focus on the same object for depth perception?

Accepted Answer

Convergence

Question 17

Which equation describes the relationship between the focal length ($$f$$), object distance ($$d_o$$), and image distance ($$d_i) in $$the eye?

Accepted Answer

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

Question 18

Which of the following is a reason why the cornea is a common site for successful transplants?

Accepted Answer

It lacks blood vessels, reducing immune rejection

Question 19

Which structure is pierced posteriorly by the optic nerve?

Accepted Answer

Sclera

Special Senses: Structure and Function in Anatomy & Physiology

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