Avelox and bed rest

I was prescribed 400 mg Avelox 1x a day for pneumonia. Had 1 in the hospital and an additional 4 doses at home. That 4th evening my vision in my right eye became totally blurred, like a heat mirage type of blurred is the only way to describe it. I called the on call doctor and while I don't think he believed me, he did change me to Ceftin. I have arthritis in my knee and after 5 days of bed rest from the pneumonia I had to go and get 35cc's of fluid drained off my knee. It is now almost one week after I stopped the Avelox and I'm having extreme calf cramps in my left leg. I have no history of this. Very strange drug that I will not be taking again. It did get rid of the pneumonia.