I was on 500mg Methylprednisolone for 5 days for my ON. I was only given it a month after ON set in, as my vision wasn’t really improving. I went completely blind in my right eye. I couldn’t even tell if someone shone a light in it. I was told it would only lessen the time it took to recover, and not necessarily change the end result (so my vision wouldn’t be better in the long run with it).
After the 5 days, I didn’t notice any difference. Was really frustrated and annoyed, because I’d had horrible side effects (insomnia, extreme thirst and hunger, and the day after I stopped my body hurt all over - not a muscle ache, but like the fat, which I have plenty of, ached when I prodded it. Very strange feeling). I did, however, over the next couple of weeks regain 95% of the vision. I think the steroids do have an effect for a good while after you stop taking them, so fingers and toes crossed you’ll see some improvement over the next few weeks!