ENT2 Flashcards
(267 cards)
what afferent pupillary defect look like
what does it mean
thee affected pupil doesn’t constrict symetrically when a light is moved from one eye to the other
what will the swinging flashlight test look like
the consensual pupillary reflex will be diminshed in the good eye when the light is shined in the affected eye
causes of afferent pupillary defect
retinal detachment (total)
optic nerve damage
causes of acute vision loss
macular disease
retinal detachments
vein occlusions
arterial onclusions
vitreous hemorrhage
optic nerve trauma
“functional vision loss”
SS macular degeneration
metamorphosia
central scotoma
metamorphosia
a symptom of macular degeneration where a grid of straightlines will appear wavy and some parts of the grid will look black
central scotoma
a symptom of macular degeneration where the middle part of the visual field looks black
why is afferent pupillary defect diagnostically valuable
because you can assess the function of the afferent and efferent nerves in both eyes from one
what would cause a bitempral visual field defect
lesion at the optic chiasma
how would a lesion in the optic tract behind the optic chiasm manifest
contralateral homogogenous hemianopsia (vision lost on the nasal ipsilateral and the temporal contralateral side)
T/F macular degeneration is painless
true
blood under the retina is indicative of what
macular degeneration
intact confrontational visual fields with poor vision is indicative of what
central scotoma from macular degeneration
VEGF inhibition
vascular enthothelial growth factor inhibition, treatment for macular degeneration
what causes macular degeneration
vascular overgrowth in the retinal pigmented epithelium precipitated by an defect
symptoms of retinal detachment
new floaters
flashing lights (photopsia)
visual field loss
what causes retinal detachment
tears that allow the vitreous humor to escape the posterior chamber and flow behind the retina
what is the goal of the scleral buckle
to fix retinal detachment by indenting the posterior eye to remove traction on the retina from the vitreous
vitrectomy
scope operation that fixes retinal detachment by draining the vitreous from behind the retina then putting an air bubble in the vitreous chamber to tamp down the retina
pneumatic retinopexy
repair of a retinal tear on the superior portion of the retina tha tuses are an air bubble in teh vitreous chamber to tamp down the tear why whe pigemented retinal cells pump out eh vitreous
branch retinal occulsion
ischemia in the retina related to HTN caused by a blockage int he retinal veins that releases VEGF`
central RVO
central retinal vein occulsion that can cause blindness of varying severity with no real treatment
caused by compression around teh optic nerve
Branch retinal artery occusion
blockage of the artery associated with carotid/cardiac dieases
may be considered emergent
hollenhort plaque
a piece of cholesterol or calcium from the carotid or heart valves that has lodged in a retinal artery
correlated with high risk of stroke