Hi motorhead,
Yes indeed, MG is a very peculiar illness. When mine started, almost all "volontary" muscles were affected except the leg and thoracic ones. After about 6 months of treatment (Mestinon, high dose Pred and Cellcept), I recovered arm strength, neck strength was back after only 2 or 3 months, and strangely, my legs got weak and it stays like that -max one hour walk on flat ground, no mention for stair climbing!- for about one year although I could swim for half an hour without any problem.
Presently (about 2 years from the start) I got my leg about normal to the point that I'm planning some hiking mid August…
Cataract: I'm in the same condition as you (one eye done before MG and the other, after) but I have now glaucoma treated with eye-drops mornings and evenings, so watch out for that!
Maurice.