Trauma Flashcards
what can fluorescein drops show
with switch lamp can identify area of epithelial loss (will show bright green)
what must you check in every eye injury
visual acuity
what happens to forces in blunt trauma
usually affects inferior wall of orbit
can transfer upwards or sideways
worst case scenario is eye splitting
what is a tear drop sign
shows blow out fracture
what muscle is commonly affected in blow out fractures- what are the resulting clinical signs
inferior rectus- tethered to the inferior orbtial wall
cant look up and reduced looking down (white eye sign)
why must you be careful with a suspected globe rupture
as can expel contents out of the eye
what is hyphaema
blood in the anterior chamber- will form a fluid level, suggest intraocular injury
what can cause a dislocated lens
blunt trauma
what causes retinal detachment
fluid behind the retina
can be fixed with surgery
what is commotio retinae
a bruised retina- should resolve
why does the pupil become mishapen in a corneal laceration
as iris prolasping through corneal laceration to try and stop flow of aqueous out
what is the seidel test of the eye
shows aqueous pouring out of the corneal laceration
what is sympathetic opthalmia
when a penetrating injury to one eye results in exposure to intra ocular antigens causing an auto immune reaction in BOTH eyes
=inflammation in both eyes
=can cause bilateral blindness
v rare
when should you be suspicious of a penetrating foreign body
pupil irregular
anterior chamber shallow
localised cataracts
gross inflammation
what investigation should you always do for intra ocular foreign bodies
x ray
