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Kaplan Qbank USMLE



Author10 Posts
  #1

An 18-year-old male presents to the ED with his
mother complaining of right-sided monocular blindness
after being struck in the face by a younger sibling. Examination
of the head and neck shows no obvious signs of trauma. Visual acuity is “no light perception” OD and 20/20 OS. Pupillary response is normal, and there is no
afferent pupillary defect. Slit lamp examination and fundoscopy
are normal. Neurologic examination is nonfocal.
The most likely etiology of this patient’s disorder is:

(A) cortical blindness
(B) functional blindness
(C) retinal detachment with macular involvement
(D) vitreous hemorrhage
(E) traumatic lens dislocation


___________________
Ruhighazi

  #2

B

  #3

b-functional blindness.

___________________
" it's not whether you get knocked down, it's whether you get up"
" i have miles to go before i sleep "

  #4

can some one pls explian the mechanism

  #5

normal optha exam wud rule out the last three.

i dont think the injury was severe enough to cause cortical blindness. Besides, it wud not result in monocular blindness. a bilateral homonymoys defect wud result.

that wud leave fxal blindness. is that a psychological disorder?


___________________
If you yourself are at peace, then there is at least some peace in the world.

  #6

B


  #7

wht exactly is functional blindness? and how? even if it is, why is light reflex normal?

btw how long does it take for fundoscopy to detect the retinal detachment????


___________________
life is guud

  #8

Functional blindness is normal vision but eyelids are involuntarily n forcibly closed due to orbicularis muscle spasm...> Blepharospasm...




  #9

exactly! and wht is OD and OS

___________________
life is guud

  #10

D and S mean rt and left


___________________
If you yourself are at peace, then there is at least some peace in the world.







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