Optic Neuritis

Question 1

who usually presents with optic neuritis?

Answer 1

20-50yrs

Question 2

What is the male to female ration of optic neuritis/

Answer 2

3:1 (female to male)

Question 3

What are the causes of optic neuritis?

Answer 3

• MS
• Giant cell arteritis
• Sarcoidosis
• TB, syphilis, lyme disease
• Vitamin B12 deficiency

Question 4

what are the risk factors for optic neuritis/

Answer 4

• MS

Question 5

What is the classic triad of symptoms in optic neuritis?

Answer 5

• Visual impairment
• Impaired colour vision
• Pain on eye movements

Question 6

What are the signs of optic neuritis?

Answer 6

• Positive relative afferent pupillary defect (RAPD)
• increased blind spot on visual fields.
• Papillodema

Question 7

What are the differential diagnoses of optic neuritis?

Answer 7

• posterior scleritis
• Maculopathy
• Retinopathy
• Big blind spot syndrome

Question 8

What is charcot’s neurological triad of MS?

Answer 8

1) Dysarthria (difficulty or unclear speech)
2) Nystagmus (also loss of vision / optic neuritis - blurring, pain on movement, impaired colour vision / double vision)
3) Intention tremor (also muscle weakness, spasm, tremor, ataxia, paralysis)

Question 9

/what investigations are done for optic neuritis?

Answer 9

MRI
Lumbar Puncture
Full opthalmological examination

Question 10

What is the treatment for optic neuritis?

Answer 10

• often just watchful waiting

- IV methylprednisolone hastens visual recovery