<unk>  may occur as a result of trauma such as a blow to the head, infection, degeneration of the inner ear, allergies, dehydration and loss of electrolytes or in extremely rare circumstances a benign tumor such as an<unk>  sac tumor. In many cases, it is not clear what causes the disorder. Ménière’s attacks occur when there is an increase in<unk>  volume in the inner ear, causing a temporary leak in the membrane separating the perilymph (potassium poor fluid) and the endolymph (potassium rich fluid). The mix of these two fluids surrounding the vestibular sensory cells can lead to a temporary electrical blockade and loss of sensory function. The sudden change in the rate of the vestibular nerve firing results in a disturbance of signal processing in the corresponding brain regions, and thus to acute sensations of imbalance, otherwise known as vertigo.
Endolymphatic hydrops
Corneal hydrops
Vitreous hemorrhage
Corneal neovascularization
Periostitis
Macular scarring
Retinal vasculitis
Episcleritis