Orbital Trauma Flashcards
what are the 3 main mechanisms of injury?
blunt trauma
penetrating trauma-large and small objects
burns-physical and chemical
what is fluorescein and what does it do?
its a dye which is taken up by epithelial defect.
helps to identify areas of trauma
what is a blow out fracture?
fracture to (inferior )wall of orbit.
get herniation of globe contents
the inferior type is most common
where cant you look if you have an inferior blow out fracture?
cant look up
punched in the eye
achy red eye
traumatic uveitis
blood in anterior chamber
hymphaema
what usually holds the lens in place
zonules
how do you test for leaks?
siedel’s test- put fluoresein dye
penetrating injury to one eye exposure of intra-ocular antigens autoimmune reaction in both eyes inflammation in both eyes may lead to bilateral blindness
sympathetic ophthalmia
what should you do if you suspect intra ocular foreign bodies?
always do an X ray!
what is worse…and acid or alkali burn to the eye and why?
alkali because it causes deeper damage as can penetrate more
what type of burn is this?
easy rapid penetration
changes to cornea and conjunctiva
penetrates intra-ocular structures
alkali
what type of burn is this?
coagulates proteins
little penetration
mainly superficial damage
acid
what can an alkali burn cause?
ischaemia
corneal scarring
corneal vascularisation
if a chemical gets in the eye what should you do?
wash it out
immediate irrigation
