Hi David it's the movement of the eye it's either Horizontal or Vertical

I had it years ago to help combat restless legs, but it was given with Senemet which I do not recommend. It helped with sleep to take Klonopin. What's more important is to find the root cause of the Nystagmus. It might be helpful to try to improve your gut health.

Yes

I assume this affects your vision and causes headaches?

What is nystagmus?