Flashcards in 10 - Opth - Squints - Incomitant Squints Deck (8):
usually due to? can be due to?
occasionally myopathies (usualy bilateral)
What would eye with a CNIII palsy look like + why?
only LR and SO spared, therefore,
eye looks down and out
complete ptosis (levator paralysis)
efferent pupillary defect (fixed dilated pupil)
What would eye with a CNIV palsy look like and why?
eye looks upwards at rest/adduction
pt may complain of tilted image
unable to look down and in (diplopia on looking down)
what would eye with a CNVI palsy look like and why?
unable to abduct affected eye
eye may drift medially (esotropia)
5 causes of neurogenic palsies - think surgical sieve
vascular - eg microvascular - likely cause if pupil sparing CNIII lesion
trauma - head injury
tumour - esp suspect in kids
inflammatory - eg post viral
infection - middle ear with VI palsy, HZoster Opthalmicus
Mechanical causes of incomitant squint
blow out fractures
thyroid eye disease
Myogenic causes of incomitant squint
Tumour/inflammation of EOMuscles