Dear Gaston, I've experienced the same vision problems, and noticed that when I cover up one eye, it helps. Visine helps too. I'm taking sinemet and pramipexole, an experimental drug, but don't know if it's the meds or the disease causing the problem. I thought it might be harmful in the long run to read with only one eye, but if it works, I'll use it! Thanks. Pat Schark