A few days ago, I went for a balance test at the local hospital. There were some dire warnings on the letter - no food for several hours before the test, no medication or alcohol etc. for several days before. take someone with you because it may make you ill. So I was not looking forward to it and expected to be spun about and made dizzy. My fears were completely unfounded as it went very well - apart form the usual fatigue afterwards that we all get.
The tests involved check your general physiology - does something else in your body affect your balance. In my case previous damage to my knee and neck. How you eyes and ears work independently from your brain functions. They gather the test results via a very unobtrusive small camera on a pair of goggles which links up to a laptop
At the end of the test the person walked me through the very detailed graphs that are produced and indicated that there was no underlying problems with my ears, eyes or other injuries which contribute to my balance problems. So the problems with my balance is centred on how my brain receives the feedback.
Whilst it wasn't part of the test, we did discover a huge problem with my night vision - most people react to reduced light up to 7 seconds mine was taking up 20 seconds, again due to the slow brain processing. So I have to watch out for driving at night and long tunnels.
Anyone having balance problems, I would ask for a balance assessment because even though there is no real short term cure, it is strangely beneficial to be able to focus the problems to a narrower area. Well worth spending the hour or so to get it done.