Is the nystagmus connected to your dizziness issues ? I have never heard of that connection. I have a positive horizontal nystagmus in my left eye and some minor convergence issues.

The Epley maneuver does no solve every dizziness issue. My Physical Therapist had a PT who used to work for her who was Dr Epley's research assistant when he was developing the maneuver. Judy was very impressed with Dr Epley's skills and knowledge.