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Contact Lens Manual > Anatomy & Physiology of the Eye > Flashcards

Anatomy & Physiology of the Eye Flashcards

1
Q

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

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

A

Epithelium

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2
Q

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

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

A

15

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3
Q

The eyelid muscle responsible for closure of the lids is the

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

A

Orbibularis Oculi

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4
Q

The anterior cornea’s main source of oxygen is the

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

A

Atmosphere

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5
Q

A dense opacity of the cornea is called a

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

A

Leukoma

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6
Q

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

A

Conjunctiva

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7
Q

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

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

A

Fornix

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8
Q

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

A

Nutrition

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9
Q

Pupillary constriction is called

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

A

Miosis

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10
Q

The bacteriocidal ingredient found in the precorneal tear film is

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

A

Lysozyme

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11
Q

How many extrinsic muscles are attached to each eye?

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

A

6

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12
Q

The fovea centralis of the retina contains

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

A

Only Cones

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13
Q

The additive primary colors are

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

A

Red, Green, & Blue

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14
Q

The bony orbit of the eye is shaped most like a

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

A

Pyramid

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15
Q

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

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

A

Crystalline Lens

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16
Q

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

A

Version

17
Q

The condition where one eye is turned is called

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

A

Strabismus

18
Q

The main function of the eye’s outer layer is

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

A

Protection

19
Q

The most refractive optical component of the eye is the

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

A

Cornea

20
Q

An opacity of the crystalline lens is called a

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

A

Cataract

21
Q

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

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

A

Glaucoma

22
Q

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

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

A

Tarsal Plate

23
Q

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

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

A

Endothelium

24
Q

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

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

A

Limbus

25
Q

The levator superioris muscle

A. Raises the Upper Lid
B. Creates Intorsion
C. Raises the Eyeball
D. Coordinates Both Eyes

A

Raises the Upper Lid

26
Q

Swelling of the corneal tissue, or any tissue, is called

A. Blepharitis
B. Dystrophy
C. Cataract
D. Edema

A

Edema

27
Q

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

A

Conjunctivitis

28
Q

The anterior ciliary arteries terminate at the

A. Optic Nerve
B. Choroid
C. Limbus
D. Iris

A

Limbus

29
Q

Aqueous humor is secreted by the

A. Meibomian Glands
B. Cones & Rods
C. Cornea
D. Ciliary Body

A

Ciliary Body

30
Q

All the colors we perceive are produced by the ___________ different photopigment found in the retinal cones.

A. 3
B. 36
C. 64
D. 140

A

3

Contact Lens Manual (11 decks)

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