I am interested finding out how flecanide 100mg x 2 daily can affect my vision? I have been having vision issues for several weeks. I checked with my pharmacy inquiring about what vision problems are caused by this drug. They could only provide me non-specific vision problems. I need to know what type of problems are possible and how I should proceed. I have been experiencing blurred vision several times a day when I move my eyes quickly up, down, or side to side. My eyes also feel strange when looking in these directions.