good stuff, sally, get on top of it early
when my knees were the worst the would give out, say if i went out of the house with a bit too much of a bound, whichever leg i landed on would buckle. or i had this impression that they didn't want to bend properly, like maybe they would bend the wrong way if i wasn't careful. or just not bend, and kind of jar me instead. don't know if any of that sounds familiar.
tell me about your b supplements, i'm interested in the amounts if you don't mind
and if it's muscle weakness you're dealing with, exacerbated by stress, with no noticeable sensory loss, i could look into that... magnesium is lost via stress, and it helps with relaxing tense muscles... but this doesn't sound like the right deal... muscles too relaxed... i'll see if i can dig something up. i have an idea but need to read a bit
about the vision symptoms, you might have heard that zinc is quite important for eyes. you could try 50mg of that at bed time, with your b-complex. i wouldn't take more than say, 50mg per day in supplements in the long term. 100mg or 150mg per day in the short term is fine to address a low zinc level but if you're not getting tested, it might not be wise to take so much.
my stepdad takes a multi called vitalux plus, which is supposed to be especially for eyes. it says to take two per day, and each capsule has 20mg zinc. he's only been taking 3 or 4 per week and just reported some newish eye trouble on his good side. so, i reminded him 2 per day to get the 40mg zinc. it also has lutein - have you heard of that for eye health?
and anyway, with its being a multivit/multimineral it can't but do you good all 'round, not just in the eyes. i hear it's pricy though, but i haven't checked to see if there's a tag on the bottle we have here. they're pretty smart, they leave out the beta carotene because they know about the study that worsened cancer risk in ex-smokers who supplemented beta carotene. there might be some actual retinol in it, which is what your body makes from beta carotene anyway. i don't have the bottle right handy but i'll report back if you're interested
anyway just some ideas
hope you can get it all resolved.