I had ON diagnosed in Dec. it was diagnosed based on my symptoms of eye pain on movement, and the present of a Marcus Gunn pupil. The neurologist subsequently noted pale optic disc after I saw them in March.
due to a previous un diagnosed episode a few years ago (which they now think was a CIS myelitis), and the emergence of L’Hermitte in Feb, they have been looking for MS.
I was was sent for VEP and MRI brain and full spine. VEP came back negative and MRI showed clear brain, but what looked like several intensities at c5 c6 posterior cervical cord. I am still waiting to be told what that means and what happens next.
this morning I have received a letter inviting me to another neurophysiology appointment to conduct VEP again, but also 3 other tests which I can’t seem to find out about:
Pattern Electroretinogram (PERG)
I wondered if anybody had an idea about what the purpose of the tests might be? Are they now looking at another diagnosis?
i know I should wait to find out but have been waiting since I had my my evoked potentials in April, and my MRI. In May, for even this to happen, just want to understand.