Optic Neuritis Flashcards
1
Q
What causes optic neuritis
A
MS
Syphillus
DM
Retinal detachment
2
Q
Symptoms of optic neuritis
A
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
What is afferent pupillary defect?
A
‘swinging light test’
pupils using a light shone alternately in each eye reveals that when the light is shone in the right eye both pupils constrict but when the light source immediately moves to the left eye both eyes appear to dilate
the affected and normal eye appears to dilate when light is shone on the affected
4
Q
Tx off optic neuritis
A
high-dose steroids
recovery usually takes 4-6 weeks
