Eye

Question 1

thinnest part of ethmoid bone

Answer 1

lamina papyracea

Question 2

optic canal contents

Answer 2

CN II and ophthalmic a.

Question 3

superior orbital fissure contents

Answer 3

CN III, CN IV, CN V1, CN VI
and superior ophthalmic v.

Question 4

what will you hit if you go straight back into the superior orbital fissure

Answer 4

internal carotid a.

Question 5

inferior orbital fissure contents

Answer 5

inferior ophthalmic v.

Question 6

structures inside common tendinous ring

Answer 6

ophthalmic a.
CN II
CN III
CN VI
nasociliary n. (branch of CN V1)

Question 7

structures outside common tendinous ring

Answer 7

CN IV
frontal n. (branch of CN V1)
lacrimal n. (branch of CN V1)
superior ophthalmic v.

Question 8

vascular layer of eye

Answer 8

choroid

Question 9

what produces aqueous humour

Answer 9

ciliary body

Question 10

artery of the retina that is in the choroid layer

Answer 10

cilioretinal a.

Question 11

superficial to deep the layers of eye

Answer 11

sclera, choroid, retina

Question 12

what 3 types of cells make up conjunctiva

Answer 12

stratified squamous
columnar epithelial
goblet

Question 13

function of conjunctiva

Answer 13

lubricate eye
immunosurveillance

Question 14

2 parts of conjunctiva

Answer 14

bulbar and palpebral

Question 15

3 causes of conjunctiva:

Answer 15

allergies, bacteria, virus

Question 16

difference b/t bacterial and viral conjunctiva

Answer 16

bacterial: thick discharge
viral: thin discharge

Question 17

caused by increase in intraocular pressure causing blindness

Answer 17

glaucoma

Question 18

what keeps retina against choroid

Answer 18

vitreous humour

Question 19

when vitreous separates from retina

Answer 19

vitreous detachment

Question 20

when retina detached from choroid

Answer 20

retinal detachment

Question 21

causes of retinal detachment

Answer 21

diabetes
injury
aging
heat from surgery

Question 22

when a piece of tissue is missing from structure of eye

Answer 22

Coloboma

Question 23

2 branches of frontal nerve

Answer 23

supraorbital (more lateral)
supratrochlear (more medial)

Question 24

95% of ocular melanomas happen here

Answer 24

uveal tract

Question 25

uveal tract contains:

Answer 25

iris, ciliary body, choroid vascular (and poor lymphatics)

Question 26

a sign of melanoma (color)

Answer 26

orange pigment

Question 27

arteries of the orbit

Answer 27

ophthalmic a. internal carotid a.

Question 28

veins of the orbit (and where they drain)

Answer 28

superior ophthalmic v. inferior ophthalmic v. drain in cavernous sinus

Question 29

3 sensory branches of ophthalmic n.

Answer 29

frontal n. lacrimal n. ( NOT to lacrimal gland) nasociliary n.

Question 30

provides all sensory info. to the eye

Answer 30

ophthalmic n.

Question 31

ganglion in the orbit and 3 nerves associated

Answer 31

ciliary ganglion short and long ciliary nasociliary

Question 32

3 motor nerves to extraocular muscles of eye

Answer 32

CN III CN IV CN VI

Question 33

motor n. supplying these muscles: levator palpebrae superioris superior rectus medial rectus inferior rectus inferior oblique

Answer 33

CN III (oculomotor)

Question 34

the rectus muscles of eye have a secondary action of what

Answer 34

move eye in

Question 35

the oblique muscles of eye have a secondary action of what

Answer 35

move eye out

Question 36

trochlear n. (CN IV) innervates what muscle

Answer 36

superior oblique m.

Question 37

abducens n. (CN VI) innervates what muscle

Answer 37

lateral rectus

Question 38

H-Test steps for checking superior rectus and inferior rectus muscles

Answer 38

first: move eye out to take away the secondary action of in second: move up or down

Question 39

H-Test for lateral rectus m.

Answer 39

move out

Question 40

H-Test for medial rectus m.

Answer 40

move in

Question 41

H-Test steps for inferior and superior oblique muscles

Answer 41

first: move eye in to eliminate secondary action of out second: move up (to check inferior) and move down (to check superior)

Question 42

L oculomotor nerve palsy causes what eye position

Answer 42

down and out

Question 43

L abducens nerve palsy causes what eye position

Answer 43

in

Question 44

R trochlear nerve palsy causes what eye position

Answer 44

up and in

Question 45

the 2 intrinsic ocular muscles that are innervated by parasympathetics

Answer 45

ciliary m. sphincter pupillae m.

Question 46

this intrinsic m. relaxes the lens and accommodates for close vision

Answer 46

ciliary m.

Question 47

this intrinsic m. constricts pupil

Answer 47

sphincter pupillae m.

Question 48

pathway of intrinsic muscle parasympathetic innervation:

Answer 48

1. Edinger Westphal Nucleus 2. CN III 3. Ciliary ganglion 4. short ciliary nerves 5. intrinsic muscles of eye

Question 49

preganglionic parasympathetic cell bodies are found where in the eye when discussing intrinsic eye muscles

Answer 49

Edinger Westphal Nucleus

Question 50

sensory to side of the face innervated by parasympathetics, NOT lacrimal n.

Answer 50

lacrimal gland

Question 51

preganglionic parasympathetic cell bodies in the eye are found where when discussing lacrimal gland

Answer 51

superior salivatory nucleus

Question 52

parasympathetic pathway to lacrimal gland:

Answer 52

1. superior salivatory nucleus 2. greater petrosal n. (branch of VII) 3. greater wing of sphenoid (pterygoid canal) 4. pterygopalatine ganglion 5. infraorbital n. to lacrimal n. 6. lacrimal gland

Question 53

cell bodies of preganglionic sympathetics found where

Answer 53

superior cervical ganglion

Question 54

brings sympathetics to pterygoid canal and its nerve

Answer 54

deep petrosal n.

Question 55

tarsal plate (under eyelid) gland dysfunction can cause what

Answer 55

dry eyes

Question 56

nerve of the pterygoid canal

Answer 56

Vidian n.

Question 57

this muscle helps levator palpebrae superioris keep eyelid from closing

Answer 57

Muller's m.

Question 58

sympathetic pathway to muller's m.

Answer 58

1. superior cervical ganglion 2. internal carotid a. 3. ophthalmic a. 4. muller's m.

Question 59

intrinsic ocular muscle innervated by sympathetics and causes pupil dilation also has similar pathway as muller's m. innervation

Answer 59

dilator pupillae m.

Question 60

this syndrome is caused by loss of sympathetic innervation to head

Answer 60

Horner's syndrome

Question 61

sx's of Horner's syndrome:

Answer 61

pupil constriction dilated blood vessels (flushing) ptosis anhydrosis

Question 62

Corneal Reflex (blink reflex) sensory innervation

Answer 62

Ophthalmic n. (CN V1)

Question 63

Corneal Reflex (blink reflex) motor innervation

Answer 63

Facial n. (CN VII)