35 year-old woman presented with unilateral worsening of vision of left eye, accompany by discomfort of eye movement for two weeks duration

Visual acuity of left eye is 6/60.

Impaired color vision.

There is left afferent pupillary defect and a central scotoma

What is the likely diagnosis

A. Optic Nerve Glioma

B. Cavernosus Sinus thrombosis

C. Grave’s disease

D. Pituitary Adenoma

E. Optic Neuritis


Image of swollen optic disc.

Answer: E

What is the most common cause for the optic neuritis?

Multiple sclerosis. Long term studies indicated that up to 75% of female patient initially developed optic neuritis ultimately developed MS.