Is it normal for ms patients to have vision problems?

See below: It's not "normal" but it is common. Ms patients can have bouts of double vision or bouts of blurry vision (from optic neuritis). If you have vision problems, you need to see an ophthalmologist.

Vision problems in M: Multiple sclerosis affects nerves throughout the body. The main nerve that carries sight from the eye and the nerves that control eye movement are commonly involved in ms.

Very common: Frequent initial presentation is optic neuritis, loss of vision in one eye, but not unique to experience loss of portions of vision, double vision, or jerking of visual fixation, amongst the many varieties of eye problems.