I stopped prednisolone before a week as my diplopia was resolved. but now i feel it will stary again. difficult to focus on a tower of far distance?

SOME THOTS: You do not explain what diagnosis wass, and not clear to me why steroid was used, so i can only speculate about specifics. However, often as double vision improves, distant images may be more afflicted than near images for a time. The key issue, in my opinion, is causation, and whether you are at risk for future problems. In your situation, get ophthalmology and neurology coordinating.