Question 1

Which component of the eye is responsible for nourishing the lens and cornea?

Accepted Answer

Aqueous humor

Question 2

During fetal development, which eye structure helps maintain the shape of the eye?

Accepted Answer

Vitreous humor

Question 3

The lens of the eye is described as transparent and flexible. What is the main protein found in lens fibers that contributes to this property?

Accepted Answer

Crystallin

Question 4

If the ciliary body stopped functioning, which of the following would most likely be affected first?

Accepted Answer

Production of aqueous humor

Question 5

Which of the following best describes the lens epithelium?

Accepted Answer

Made of cuboidal epithelial cells

Question 6

A patient presents with increased intraocular pressure that is damaging the optic nerve. Which fluid is most likely accumulating?

Accepted Answer

Aqueous humor

Question 7

Which part of the eye fills the anterior portion and is a liquid?

Accepted Answer

Aqueous humor

Question 8

Cataracts are caused by changes to which protein in the eye?

Accepted Answer

Crystallin

Question 9

Which equation best represents the relationship between intraocular pressure ($$P$$), volume of aqueous humor ($$V$$), and outflow resistance ($$R$$)?

Accepted Answer

$$P = \frac{V}{R}$$

Question 10

If a patient has a mutation affecting the cuboidal epithelial cells of the lens, which function is most likely impaired?

Accepted Answer

Maintenance of lens transparency

Question 11

Which structure is most likely to be affected in a patient with a congenital defect in the development of the gel that fills the posterior portion of the eye?

Accepted Answer

Vitreous humor

Question 12

A patient with a lens that cannot properly focus light likely has a defect in which structure?

Accepted Answer

Lens disc

Question 13

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

Accepted Answer

Helps maintain eye shape during fetal development

Question 14

Which of the following would most likely result from a blockage in the outflow of aqueous humor?

Accepted Answer

Increased intraocular pressure

Question 15

Which layer of the lens is made of cuboidal epithelial cells?

Accepted Answer

Lens epithelium

Question 16

If the lens loses its flexibility, which process is most likely to be impaired?

Accepted Answer

Focusing light on the retina

Question 17

Which of the following best describes the physical state of the vitreous humor?

Accepted Answer

Gel

Question 18

A patient with a cloudy lens is most likely suffering from which condition?

Accepted Answer

Cataracts

Question 19

Which structure is responsible for focusing light onto the retina?

Accepted Answer

Lens

Question 20

If the lens fibers lose their crystallin protein, what is the most likely consequence?

Accepted Answer

Loss of lens transparency

Optic Components of the Eye: Structure and Function

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