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CAVA is currently collecting data from consenting participants with an existing diagnosis of Ménière’s disease, vestibular migraine or BPPV. The objective is to recruit 255 adult participants, eighty-five participants with each condition. Each participant will wear the CAVA device near continuously for thirty days. The device will record all eye and head movements during this time, including during any episodes of vertigo. We will develop computer algorithms that use the data captured by the CAVA devices to differentiate between Ménière’s disease, vestibular migraine or BPPV.