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Motility > Paralytic Strabismus > Flashcards

Paralytic Strabismus Flashcards

1
Q

CN 3 Palsy

A

eye down and out (LR + SO work)
ptosis
dilated pupil
no accommodation

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2
Q

Common Causes of Pupil Sparing CN 3 Palsy

A

diabetes

hypertension

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3
Q

Causes of Non-Pupil Sparing CN 3 Palsy

A

aneurysm of PCA
neoplasms- neuromas and schwannomas; tumors of pituitary and sphenoid wing
trauma

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4
Q

CN 4 Palsy

A

eye up and in- SO impaired

head tilt opposite to side of palsy

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5
Q

Horner’s Syndrome Triad

A

Ptosis
Miosis
Anhydrosis

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6
Q

CN causing Horner’s Syndrome

A

4

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7
Q

Causes of CN 4 Palsy

A

Idiopathic
Trauma
diabetes, HTN

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8
Q

CN 6 Palsy

A

eye turned in- LR
esotropia
head turn toward affected eye

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9
Q

Most commonly affected oculomotor nerve

A

CN 6

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10
Q

Causes CN 6 Palsy

A

trauma
aneurysm
ischemic- HTN, diabetes

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11
Q

Testing Palsies

A 
case history
external observation
VAs
CT
EOMs
Hess-Lancaster
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12
Q

Cavernous Sinus Contents

A

CN 3, 4, V1, V2, 6

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13
Q

Causes of Cavernous Sinus Palsies

A

neoplasms
carotid cavernous fistula
aneurysm

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14
Q

Orbital Apex Syndrome

A

optic nerve affected

affects nerves in cavernous sinus

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15
Q

Causes of Orbital Apex Syndrome

A

neoplasms
fungal infection
inflammation

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16
Q

Medial Rectus Palsy

A

exo deviation

greater at near

17
Q

Inferior Rectus Palsy

A

hyper and exo deviation

18
Q

Superior Rectus Palsy

A

bilateral

V exo pattern

19
Q

Inferior Oblique Palsy

A

A eso pattern

20
Q

Double Elevator Palsy

A

SR and IO
no elevation in abduction or adduction
Bell’s phenomenon

21
Q

Bell’s Phenomenon

A

lid does not close

22
Q

Forced duction test in double elevator palsy

A

positive

mechanical- wont move

23
Q

Double Depressor Palsy

A

IR and SO
no depression in abduction or adduction
head tilted down

24
Q

Cause of CN 3 Palsy w/ pupil sparing

A

vascular

25
Q

Cause of CN 3 Palsy w/o pupil sparing

A

aneurysm

26
Q

Treating Ischemic Etiology

A

in HTN, DM, atherosclerosis, smoking

order blood tests- BP, glucose tolerance

27
Q

Prognosis for Ischemic Etiology

A

resolves in 3 months

28
Q

Prescribing Glasses

A 
improve VAs can help control deviation
induce prism (nondominant eye)

Motility (9 decks)

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