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18 Cards in this Set
- Front
- Back
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What structures are supplied by the anterior circulation?
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optic nerve, globe structures, some visual cortex
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What is supplied by the posterior circulation of the eye?
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primary visual cortex supply
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What are the basic parts of the ophtho exam?
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External exam (CNs, and ptosis), vision, pupils, visual fields
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What technique is used to detect an afferent pupillary defect?
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The swinging flashlight test
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What are the causes of monocular vision loss over seconds?
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MS, papilledema
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What are the causes of monocular vison loss over minutes?
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amaurosis fugax (temporary lack of blood supply to the retinal artery), migraine
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What are the causes of monocular vision loss persistently?
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ischemic optic neuropathy, optic neuritis, temporal arteritis
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What are the causes of visual field losses?
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stroke, mass
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What can cause unequal pupils with one being larger (worse in bright light)?
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third nerve palsy, pharm. dilated, Adie's tonic pupil, traumatic, post surgical
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What can cause unequal pupils with one being smaller (worse in dim light)?
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Horner's syndrome, pharm. miotic, traumatic, post surgical.
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If one pupil is larger than the other, what is the work up?
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If in the presence of CN III palsy, may be an aneurysm; Adie's tonic pupil constricts to 0.1% pilocarpine
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If one pupil is SMALLER than the other, what is the workup?
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Horner's doesn't dilate to 10% cocaine.
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In Horner's syndrome, what pathway is affected?
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The sympathetic pathway.
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What is the pupillary dilation pathway?
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From hypothalamus to cervical; cord to superior cervical ganglion (SCG); SCG to iris
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What does CN IV innervate?
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Superior oblique
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What does CN VI innervate?
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Abducens
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What does CN III innervate?
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All recti and inferior oblique
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What is the apperance of the eye in CN III palsy?
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Down, out and blown
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