  | 
The
peripheral visual fields are normal in both eyes. There is a right central
scotoma (revealed by testing the central field with a red pin). Note:
the most likely diagnosis is optic neuritis.
 Further examination: 
 
- 
Mention you like to examine the patient's fundus for any
evidence of papillitis or optic atrophy. Also check for relative afferent
pupillary defect.
 
- 
If ask to perform neurological examination, look for cerebellar
signs or spastic paresis which are common in patients with multiple sclerosis.
 
 
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