Optic neuritis Flashcards
1
Q
causes
A
Ms
DM
Syphillis
2
Q
features
A
unilateral decrease in visual acuity over hours or days
poor discrimination of colours, ‘red desaturation’
pain worse on eye movement
relative afferent pupillary defect
central scotoma
3
Q
Ix
A
MRI brain and orbits with gadolinium contrast
4
Q
Mx
A
high dose steroids
5
Q
recovery time
A
4-6 weeks
6
Q
prognosis
A
MRI: if > 3 white-matter lesions, 5-year risk of developing multiple sclerosis is c. 50%
