What symptoms does Magnesium help?

[K.B.Fante]

I started taking a Magnesium supplement about three days ago and have already noticed a pretty drastic decrease in anxiety, which is great. I feel much more at ease and not as prone to thinking negatively. But I was curious as to whether magnesium helps alleviate visual symptoms as well, and if so which ones? I haven't noticed any improvement here really, but I think this could also be because most of my worst symptoms are DP-DR related.