Central retinal artery obstruction Flashcards
1
Q
Main arteries supplying the eye
A
Central retinal artery and posterior ciliary artery
2
Q
What does the CRA supply?
A
Superior nerve fibre layer and inner 2/3 of retina
3
Q
What does PCA supply
A
Rest of the ant. optic nerve, uvea (iris, ciliar body and choird) - ie deep retinal layers
4
Q
What does CRA obstruction lead to?
A
Ischaemia of the inner retinal layers and therefore oedema of nerve fibre layers.
5
Q
Typical retinal sign
A
White but with a cherry red spot
6
Q
3 symptoms
A
painless loss of vision
profound drop in visual acuity
afferent papillary defect
7
Q
6 potential causes
A
arteritis atheroma embolus migraine syphilis Herpes zoster
8
Q
drug used to reduce intraocular pressure
A
acetazolamide
9
Q
what should be started prophylactically
A
aspirin and a stain
10
Q
what needs to be done on follow up
A
check for carotid bruitis and heart murmur
