acute visual loss Flashcards
(38 cards)
what is the 1st surface that the light has to go thru
tear film
order of media as light passes thru eye
- tear film
- cornea
- anterior chamber
- lens
- vitreous
what is a common cause of corneal edema?
increased IOP
what is corneal edema often caused by
corneal edema
Very red eye, very painful, mid-dilated fixed pupil, acute onset, blurred vision
acute angle closure glaucoma
blood in the anterior chamber due to blunt trauma
hyphema
what are lenticular changes?
cataracts
does hyphema or vitreous hemorrhage resolve faster?
hyphema
what is vitreous hemorrhage most commonly due to?
diabetic retinopathy with neovascularization
vitreous detachment is most commonly due to?
myopia
when specks/clumps create shadows reflected onto the retina
vitreous detachment
flashes of light + floaters; followed by shade in visual field
retinal detachment
does vitreous detachment or retinal detachment require immediate care
retinal detachment
where does retinal detachment begin and dissect?
begins peripherally, dissects posteriorly
leading cause of blindness in US (3)
- diabetes
- macular degeneration
- glaucoma
sudden loss of vision due to neovascular net bleeding
wet form of macular degeneration
temporary arterial obstruction with monocular dimming of vision
amaurosis fugax
amaurosis fugax results in what sort of visual loss?
sudden, transient
if someone presents with amaurosis fugax, then what tests to do?
carotid U/S, echo, or holter monitor
visual sx of migraine (5)
- scintillating scotoma
- amaurosis fugax
- transient cortical blindness
- homonymous hemianopia
- classic/ opthalmic
sudden painless loss of vision that is a true ocular emergency
central retinal artery occlusion
opaque retina with a cherry red spot
central retinal artery occlusion
which type of retinal artery occlusion is more associated with emboli?
branch retinal artery occlusion
branch retinal artery occlusion is most commonly what type of emboli
cardiac, talk, fat, vasculitis