Is it normal when i run on a treadmill for it to be hard to focus on screen on treadmill bc everything is bouncing a bit? the faster i run the more it

Somewhat : Normally when we run or move, we can focus on a stationary object and it should not appear to move. The first thing I would check is the screen itself to make sure it is not loose and moving up and down when you run. If it looks ok, I would just mention this to your primary care doctor to get a good check up and make sure everything is ok with your vision.