Shortly after finishing a 9-day course of Levaquin, I developed double vision (diplopia). I had to take Methylprednisilone for 6 days. The neuro-opthalmologist says I have inflamed eye muscles, and possibly inflamed optic nerve due to the sinus infection. In the book "Bitter Pills" by Stephen Fried, he mentioned that his wife after being Floxed was examined by a neuro-opthalmologist and had atrophied optic nerve.