Question 1

Which of the following best describes the function of the aqueous humor in the anterior segment of the eye?

Accepted Answer

It helps maintain intraocular pressure and provides nutrients for the lens and cornea.

Question 2

A patient presents with a hard, opaque lens and gradual loss of vision. Which risk factor is LEAST likely to contribute to this condition?

Accepted Answer

High protein diet

Question 3

Which instrument is used to examine the interior of the eyeball and can help detect conditions such as diabetes and arteriosclerosis?

Accepted Answer

Ophthalmoscope

Question 4

What is the correct sequence of structures that light passes through as it travels to the retina?

Accepted Answer

Cornea → Aqueous humor → Lens → Vitreous humor → Retina

Question 5

Which of the following equations best represents the relationship for the refraction of light in the eye?

Accepted Answer

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

Question 6

Which chamber of the eye contains a gel-like substance that helps prevent the eye from collapsing?

Accepted Answer

Posterior segment

Question 7

A blockage in the canal of Schlemm would most likely result in which of the following?

Accepted Answer

Increased intraocular pressure and potential glaucoma

Question 8

Which of the following is NOT a function of the vitreous humor?

Accepted Answer

Provides nutrients for the lens and cornea

Question 9

If the lens of the eye becomes opaque and hard, what is the most likely diagnosis?

Accepted Answer

Cataract

Question 10

Which of the following best explains why the eye is set for distance vision (over 20 feet away) at rest?

Accepted Answer

The lens is at its thinnest and least curved state.

Question 11

Which of the following is a plausible consequence of untreated cataracts?

Accepted Answer

Blindness in the affected eye

Question 12

Which of the following best describes the difference between the anterior and posterior segments of the eye?

Accepted Answer

The anterior segment contains aqueous humor, while the posterior contains vitreous humor.

Question 13

Which of the following is a function of the canal of Schlemm?

Accepted Answer

It reabsorbs aqueous humor into venous blood.

Question 14

A patient with diabetes is at increased risk for which eye condition detectable by ophthalmoscope?

Accepted Answer

Retinal degeneration

Question 15

Which of the following best explains why the aqueous humor must be continuously reabsorbed?

Accepted Answer

To maintain a constant intraocular pressure

The Eye: Structure, Fluids, and Light Pathway

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