Anatomy & Physiology of the Eye

Question 1

Which layer of the cornea make up 10% of the structure’s total thickness?

A. Epithelium
B. Bowman’s Membrane
C. Endothelium
D. Stroma

Answer 1

Epithelium

Question 2

The vertical measurement of the palpebral fissure for an average eye is _________ mm

A. 5
B. 10
C. 15
D. 20

Answer 2

15

Question 3

The eyelid muscle responsible for closure of the lids is the

A. Dilator Pupillae
B. Orbicularis Oculi
C. Levator Superioris
D. Pectoral Blephari

Answer 3

Orbibularis Oculi

Question 4

The anterior cornea’s main source of oxygen is the

A. Atmosphere
B. Short Posterior Ciliary Arteries
C. Aqueous Humor
D. Central Retinal Vein

Answer 4

Atmosphere

Question 5

A dense opacity of the cornea is called a

A. Dendrite
B. Nebula
C. Fovea
D. Leukoma

Answer 5

Leukoma

Question 6

The goblet cells that secrete mucous into the tear film are located in which structure?

A. Ciliary Body
B. Retina
C. Conjunctiva
D. Tarsal Plate of the Eyelid

Answer 6

Conjunctiva

Question 7

The transition zone between the bulbar conjunctiva and the palpebral conjunctiva is called the

A. Fundus
B. Blend
C. Limbus
D. Fornix

Answer 7

Fornix

Question 8

The middle layer of the three main layers of the globe is mostly responsible for

A. Nutrition
B. Light Sensitivity
C. Protection
D. Ocular Motility

Answer 8

Nutrition

Question 9

Pupillary constriction is called

A. Cycloplegia
B. Esophoria
C. Miosis
D. Mydriasis

Answer 9

Miosis

Question 10

The bacteriocidal ingredient found in the precorneal tear film is

A. Lysozyme
B. Papain
C. Sodium Chloride
D. Lactic Acid

Answer 10

Lysozyme

Question 11

How many extrinsic muscles are attached to each eye?

A. 2
B. 4
C. 6
D. 8

Answer 11

6

Question 12

The fovea centralis of the retina contains

A. Only Cones
B. Both Cones and Rods
C. Only Rods
D. Neither Cones nor Rods

Answer 12

Only Cones

Question 13

The additive primary colors are

A. Red, White, & Blue
B. Red, Green, & Blue
C. Red, Yellow & Blue
D. Orange, Green, & Blue

Answer 13

Red, Green, & Blue

Question 14

The bony orbit of the eye is shaped most like a

A. Ball
B. Cube
C. Trapezoid
D. Pyramid

Answer 14

Pyramid

Question 15

The structure that can adjust its focus for various object positions is the

A. Cornea
B. Retina
C. Vitreous Humor
D. Crystalline Lens

Answer 15

Crystalline Lens

Question 16

The term that is used to describe both eyes moving in the same direction, as when they both look left or right, is

A. Vergence
B. Vitreous
C. Version
D. Virgule

Answer 16

Version

Question 17

The condition where one eye is turned is called

A. Rubeosis
B. Neovascularization
C. Strabismus
D. Orthophoria

Answer 17

Strabismus

Question 18

The main function of the eye’s outer layer is

A. Protection
B. Nutrition
C. Illumination
D. Light Sensation

Answer 18

Protection

Question 19

The most refractive optical component of the eye is the

A. Retina
B. Cornea
C. Ciliary Body
D. Crystalline Lens

Answer 19

Cornea

Question 20

An opacity of the crystalline lens is called a

A. Melanoma
B. Pinguecula
C. Presbyopia
D. Cataract

Answer 20

Cataract

Question 21

Loss of vision caused by excessive intra-ocular pressure is called

A. Presbyopia
B. Glaucoma
C. Trachoma
D. Keratitis

Answer 21

Glaucoma

Question 22

Which of the following structures would belong to the adnexa oculi?

A. Ciliary Muscle
B. Optic Disc
C. Tarsal Plate
D. Lens Zonule

Answer 22

Tarsal Plate

Question 23

The corneal layer that consists of a single layer of hexagonal cells is the

A. Epithelium
B. Bowman’s Layer
C. Endothelium
D. Stroma

Answer 23

Endothelium

Question 24

The transitional area that joins the cornea and the sclera is known as the

A. Fundus
B. Limbus
C. Aqueous
D. Strabismus

Answer 24

Limbus

Question 25

The levator superioris muscle A. Raises the Upper Lid B. Creates Intorsion C. Raises the Eyeball D. Coordinates Both Eyes

Answer 25

Raises the Upper Lid

Question 26

Swelling of the corneal tissue, or any tissue, is called A. Blepharitis B. Dystrophy C. Cataract D. Edema

Answer 26

Edema

Question 27

Inflammation of the mucous membrane that lines the inside of the eyelids and covers the anterior globe except for the cornea is called A. Aniridia B. Blepharitis C. Conjunctivitis D. Dacryocysitis

Answer 27

Conjunctivitis

Question 28

The anterior ciliary arteries terminate at the A. Optic Nerve B. Choroid C. Limbus D. Iris

Answer 28

Limbus

Question 29

Aqueous humor is secreted by the A. Meibomian Glands B. Cones & Rods C. Cornea D. Ciliary Body

Answer 29

Ciliary Body

Question 30

All the colors we perceive are produced by the ___________ different photopigment found in the retinal cones. A. 3 B. 36 C. 64 D. 140

Answer 30

3