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AB 2nd Year Anatomy > Ophthalmology > Flashcards

Ophthalmology Flashcards

1
Q

<p>what happens in a blowout #?</p>

A

<p>blast to somewhere in the head is transmitted to another bone, causing a #</p>

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2
Q

<p>what bones are usually # in blowout?</p>

A

<p>maxilla or ethmoid</p>

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3
Q

<p>innervation of orbicularis oculi?</p>

A

<p>CN7</p>

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4
Q

<p>what parts of orbicularis oculi do what?</p>

A

<p>palpebral closes gently, orbital portion closes tightly

| </p>

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5
Q

<p>innervation of levator palpebrae superioris?</p>

A

<p>CN3</p>

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6
Q

<p>function of levator palpebrae superioris?</p>

A

<p>raises eyelid</p>

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7
Q

<p>what innervates the lacrimal gland?</p>

A

<p>CN7</p>

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8
Q

<p>path of tears?</p>

A 
<p>across cornea
puncta lacrimalia
canaliculus
lacrimal sac
nasolacrimal duct
inf meatus (below inferior conchae)</p>
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9
Q
A

<p>1. cornea</p>

<p>2. lens</p>

<p>3. iris</p>

<p>4. ciliary body and ciliary muscle</p>

<p>5. optic part of retina</p>

<p>6. choroid</p>

<p>7. sclera</p>

<p>8. fovea centralis (in macula)</p>

<p>9. optic nerve</p>

<p>10. vitreous body</p>

<p>11. anterior chamber</p>

<p></p>

<p></p>

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10
Q

what controls sphincter pupillae?

A

CN3

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11
Q

what does sphincter pupillae do?

A

constricts the pupil in bright light

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12
Q

what does dilator pupillae do?

A

dilates pupil

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13
Q

out of sphincter pupillae and dilator pupillae, which is para/symp?

A

sphincter - parasympathetic

dilator - sympathetic

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14
Q

what muscle of the eye is supplied by CN6?

A

lateral rectus

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15
Q

what eye muscle is supplied by CN4?

A

superior oblique

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16
Q

what muscles are supplied by CN3?

A

medial rectus
inferior rectus
inferior oblique
(inferior branch)

superior rectus
LPS
(superior branch)

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17
Q

what does the ciliary muscle encircle?

A

the lens

18
Q

when lens is relaxed (thin), what happens to the muscles?

A

ciliary muscles relax

suspensory ligaments are TENSE

19
Q

when lens is fat, what happens to the muscles?

A

ciliary muscles contract

suspensory ligaments are relieved

20
Q

what is a thin lens good for seeing?

A

far away

21
Q

what is a fat lens good for seeing?

A

near vision

22
Q

what holds the eye above the floor of the orbit?

A

suspensory ligament of the eye

23
Q

what can occur with a # zygoma?

A

diplopia

LOS to midface

24
Q

what branches supply what in the face?

A

CNV1 - upper and nose
2 - middle
3 - lower

25
Q

sensory supply of cornea?

A

CNV1

26
Q

AP conduction route in the blink reflex?

A

conducted in CNV1 to trigeminal ganglia then pons

then to CN7 to orbicularis oculi

27
Q

what carries sympathetic axons into the orbit?

A

ophthalmic artery

28
Q

what are the parasympathetic CNs?

A

3, 7, 9, 10

29
Q

what nerve carries presynaptic parasympathetic nerves to the ciliary ganglion?

A

CN3

30
Q

what is the vestibulo-ocular reflex?

A

turning eyes opposite to the direction of head movement

31
Q

what is the oculocardiac reflex?

A

bradycardia in response to tension on the extraocular muscles/pressure on the eye

32
Q

nerve connections in vestibulo-ocular reflex?

A

CN 3,4,6,8

33
Q

nerve connections in oculocardiac reflex?

A

CNV1, X

34
Q

focusing on near objects is parasympathetic/sympathetic?

A

parasympathetic

35
Q

focusing on far objects is parasympathetic/sympathetic?

A

sympathetic

36
Q

what type of drugs enlarge the pupil?

A

mydriatic

37
Q

symptoms of horners synrome?

A

ptosis
miosis
anhydrosis
enopthlamos

38
Q

what pathology can cause a fixed dilated pupil?

A

CN3

39
Q

what are the two types of light reflex?

A

direct

consensual

40
Q

what nerves relay the light reflex?

A

ipsilateral CN2
connections in the thalamus
bilateral CN3 (motor)

41
Q

pathway of sympathetic nerves supply when opening the eyes wider?

A 
superior cervical sympathetic ganglion
interal carotid nerve 
internal carotid plexus
opthalmic artery (carries nerves)
levator palpabrae superioris

AB 2nd Year Anatomy (14 decks)

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