The former 2 represent common forms of peripheral vestibular disease which need to be separated from each other and from central vestibular disease. (lowchensaustralia.com)
If these diagnostics return normal results and your cat's history and neurological exam are consistent with peripheral vestibular disease, a diagnosis of IVD is considered. (vetneurochesapeake.com)
Moreover, horizontal nystagmus from peripheral vestibular disease oscillates with the fast - phase away from the direction of the head tilt. (lowchensaustralia.com)