In the over 45 years with MS, I have never, to my knowledge had a cognitive test. At least I never received a report on the results of one.....Wait a min, maybe I forget..
To tell you the truth, I don't think I'd want one.

MS and aging is quite enough for me, TYVM, I wouldn't want to know if I was loosing any of my brainpower.
I read, I do puzzles and play other word games, to keep my brain working. So far, so good.
I am so so sorry that some of you are suffering eye problems and cog fog.