<unk>  <unk>  is a diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus.  It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibular system.
Electronystagmography
Contraction stress test
Tourniquet test
Abreugraphy
Thermography 
Urodynamics
Sphygmomanometer
Intravascular ultrasound