optic neuritis Flashcards
1
Q
what is optic neuritis
A
inflammatory condition - affects optic nerve
2
Q
presentation of optic neuritis
A
- sudden visual loss - acute, unilateral, occurs over days
- pain on eye movement - can precede vision loss
- change in colour perception (dyschromatopsia) - red-green
- RAPD
- visual field defects inc central scotoma, altitudinal defects, arcuate scotoma, depression of sensitivity in all quadrants
- difficulty adapting to light
- uhthoff’s phenomenon
- bilateral less common
3
Q
most common association with optic neuritis
A
MS
4
Q
ix and exam for optic neuritis
A
examination
field testing
MRI
5
Q
mx of optic neuritis
A
steroids - reduce inflammation and speed up recovery
sx mx
6
Q
fundoscopy for visual field defects
A
normal
optic disc swelling - papillitis
peripapillary haemorrhages
optic disc pallor - sign of axonal loss
