Have you been tested for visual vertigo? It is not commonly diagnosed as the symptoms are rather vague and it was recognised as a medical condition only in 1995. Your comment that it affected you when moving struck a cord. I am not qualified to explain the condition competently, but its basically an imbalance between ears eyes and brain causes excess strain on the eyes causing the dizziness.It is not Menieres or labyrinthitis. Much of my life has been spent consulting GPs, neurologists, psychiatrists, neurosurgeons, eye specialists and others with no success, until around 6 months ago I had two falls, resulting in my being referred to the Bromley Falls and Fracture Clinic, which, after extensive tests lasting around 2 hours, diagnosed me with the condition. It may be worth your while asking to be referred to a physiotherapist with specialist knowledge of this condition, if you haven't already, if only to rule it out.