My very first symptoms included double, greyed out vision with BIG blind spots. Everything would bounce/shake if I walked - and still does if I am overtired or overheated - my Neuro calls it oscillopsia. Walking down supermarket aisles was really bizarre - I knew there were things on the shelves, but I couldn't see their labels.

I found this on youtube - thought it summed the oscillopsia up well:

https://www.youtube.com/watch?v=fsD3RDUqgJU

Careful though - if you watch it in full screen it may make you feel dizzy - it does me.