EYE (E3)

Question 1

Define adnexa

Answer 1

The group of structures surrounding the eyeball which provide protection and movement

Question 2

What portion of tear film do the tarsal glands produce?

Answer 2

the oily portion

Question 3

What portion of the tear film do the gland of the 3rd eyelid and the lacrimal gland produce?

Answer 3

the aqueous portion

Question 4

What is another name for the 3rd eyelid?

Answer 4

plica semilunaris

Question 5

What is the orbit?

Answer 5

the cavity containing the eyeball

Question 6

What is the periorbita?

Answer 6

a cone-shaped sheath of CT and smooth m that encloses the eyeball and its muscles, vessels and nerves

Question 7

outermost layer of the eyeball?

Answer 7

cornea

Question 8

How do you recognize the sclera?

Answer 8

the white of the eye

Question 9

what is the choroid?

Answer 9

the pigmented posterior portion of the vascular coat of the eyeball

Question 10

What is the fundus?

Answer 10

the posterior portion of the eyeball

Question 11

What is the fluid posterior to the lens?

Answer 11

jelly-like vitreous body

Question 12

What is the fluid anterior to the lens?

Answer 12

aqueous humor

Question 13

What is the retina?

Answer 13

part of the internal coat of the eyeball. contains rods and cones

Question 14

palpebral fissure

Answer 14

the opening between the 2 eyelids

Question 15

medial and lateral palpebral commissures

Answer 15

where the uper and lower eyelids join (medial and lateral)

Question 16

palpebral conjunctiva

Answer 16

mucosal membranes that line the inner eyelids

Question 17

bulbar conjunctiva

Answer 17

mucosal membranes that covers the sclera

Question 18

conjunctival sac

Answer 18

bound externally by palpebral conjunctiva and interally by bulbar conjunctiva. opens at the palpebral fissure

Question 19

lacrimal gland

Answer 19

on dorsolateral border of eyeball, medial to orbital ligament; makes tears

Question 20

levator palpebrae superioris muscle

Answer 20

innervated by the oculomotor nerve (III); begins at the apex of the orbit, over the dorsal rectus; thin muscle that controls the movement of the eyelid

Question 21

dorsal rectus muscle

Answer 21

innervated by the oculomotor nerve (III); attaches dorsally to eyeball

Question 22

medial rectus muscle

Answer 22

innervated by the oculomotor nerve (III); attaches medially to eyeball

Question 23

ventral rectus muscle

Answer 23

innervated by the oculomotor nerve (III); attaches ventrally to eyeball

Question 24

retractor bulbi muscle

Answer 24

innervated by the abducens nerve (VI); surrounds the optic nerve with its four fascicles; when contracted, third eyelid is able to cover eyeball

Question 25

lateral rectus muscle

Answer 25

innervated by the abducens nerve (VI); attaches laterally to eyeball

Question 26

dorsal oblique muscle

Answer 26

innervated by the trochlear nerve (IV); passes through a groove in the trochlea (cartilaginous structure medially) and then courses laterally

Question 27

ventral oblique muscle

Answer 27

innervated by the oculomotor nerve (III); attaches near where lateral rectus attaches and courses medially across ventral rectus

Question 28

trochlea

Answer 28

a smooth, grooved cartilaginous process shaped like a pulley in the eye medially; dorsal oblique muscle is set within a groove

Question 29

superficial gland of the third eyelid

Answer 29

gland attached ventrally to the third eyelid

Question 30

external fibrous coat is composed of?

Answer 30

sclera and cornea

Question 31

limbus

Answer 31

border between cornea and sclera

Question 32

middle vascular coat (uvea) made up of?

Answer 32

choroid, ciliary body, and iris

Question 33

iris

Answer 33

contains circular and radial smooth muscle; allows/restricts light from entering eyeball

Question 34

choroid

Answer 34

middle, vascular layer of the eye; attaches firmly to the inside of the sclera

Question 35

ciliary body

Answer 35

located between the iris and choroid; contains numerous muscle bundles that regulate the shape of the lens

Question 36

ciliary processes

Answer 36

longitudinal tissue folds at the anterior part of the ciliary body; anchor zonular fibers

Question 37

lens

Answer 37

a structure that focuses the light on the retina; held in place with zonular fibers between two chambers in the eye

Question 38

vitreous chamber

Answer 38

most posterior chamber of the eye, filled with vitreous body

Question 39

optic disk

Answer 39

blind spot; an opening in the retina where the optic nerve fibers exit the eye

Question 40

1

Answer 40

external fibrous layer of the eye

Question 41

2

Answer 41

middle vascular (uvea) layer of the eye

Question 42

3

Answer 42

internal layer (retina)

Question 43

A

Answer 43

dorsal rectus

Question 44

B

Answer 44

medial rectus

Question 45

C

Answer 45

Ventral rectus

Question 46

D

Answer 46

lateral rectus

Question 47

a

Answer 47

dorsal oblique

Question 48

b

Answer 48

ventral oblique

Question 49

action of dorsal rectus?

Answer 49

elevates the globe

Question 50

which CN is dorsal rectus innervated by?

Answer 50

CN III

Question 51

Action of ventral rectus?

Answer 51

Depresses the globe

Question 52

which CN is the ventral rectus innervated by?

Answer 52

CN III

Question 53

action of medial rectus

Answer 53

turns the globe medially (nasally)

Question 54

which CN is the medial rectus innervated by?

Answer 54

CN III

Question 55

action of the lateral rectus?

Answer 55

turns globe laterally

Question 56

which CN innervates lateral rectus?

Answer 56

CN VI (Abducens)

Question 57

action of dorsal oblique?

Answer 57

rotates the 12 o'clock position medially (intortion of the globe)

Question 58

which CN innervates the dorsal oblique?

Answer 58

CN IV (Trochlear)

Question 59

action of ventral oblique

Answer 59

rotates the 12 o'clock position laterally (extortion of the globe)

Question 60

which CN innervates the ventral oblique?

Answer 60

CN III

Question 61

action of the retractor bulbi?

Answer 61

retract the globe

Question 62

which CN innervated the retractor bulbi?

Answer 62

CN VI (Abducens)

Question 63

dilation of the pupil

Answer 63

mydriasis

Question 64

constriction of the pupil

Answer 64

miosis