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Ophthalmology > Assessing Optic and Visual Field > Flashcards

Assessing Optic and Visual Field Flashcards

1
Q

four parts of the optic disc

A

intraocular
intraorbital
intracamalicular
intracranial

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2
Q

where is the optic canal?

A

greater wing of the sphenoid bone

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3
Q

normal size of the optic disc?

A

0.7-2.0mm (1.5mm is average)

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4
Q

what are the 3 C’s to look at when assessing the optic disc?

A
  1. contour
  2. colour
  3. cup
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5
Q

causes of optic neuropathy

A 
NIGHT TICS
neuritis
ischaemia
granulomatous
hereditary
traumatic
toxic
irradiation
compression
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6
Q

normal ratio of cup

A

0.3

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7
Q

ISNT rule for borders of cup

A 
ISNT
inferior= thickest
superior
nasal
temporal= thinnest
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Ophthalmology (28 decks)

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