Which of the following investigation is not necessary for investigating optic neuritis?
USG B scan is not useful for evaluating optic neuritis. MRI head and orbit is needed for evaluation of optic neuritis to rule out MS. ESR- |sed in infectious causes of optic neuritis. Visual fields are used for follow up and extent of vision loss. OCT (Optical coherence tomography)- used to see amount of optic nerve edema.
MRI head and orbit
ESR
USG B scan
Visual Fields
Neuro Ophthalmology