title: [Design and preliminary use of the device of subjective visual vertical].
abstract: OBJECTIVE
  The device of subjective visual vertical (SVV) was made to test the gravity orientation of subjects visual.
  
  
  METHODS
  The normative value was established firstly in the right, left and both eyes respectively. Then the test was applied to evaluate the function of otolith function (utricular function) in normal adult subjects and examined the SVV in some patients suffered from acute unilateral vestibulopathy.
  
  
  RESULTS
  The difference of the SVV among right, left and both eyes was not significant and the normative value was lower than +/- 2 degrees. No matter one eye or both eyes, SVV had the tendency to lateraliseze to the right.
  
  
  CONCLUSIONS
  The SVV is a reliable choice to test the otolith vestibulopathy, which is at least suitable for acute phase. The bilateral eyes open mode is recommended to test the subjects suspected of utricuar dysfunction.
authors.affiliation: Department of Otorhinolaryngology Head & Neck Surgery, Otolaryngology Institute of General Hospital of Chinese PLA, Beijing 100853, China. zimingwu@163.com
authors.forename: Zi-ming
authors.initials: ZM
authors.lastname: Wu
authors.forename: Su-zhen
authors.initials: SZ
authors.lastname: Zhang
authors.forename: Cheng-jun
authors.initials: CJ
authors.lastname: Zhao
authors.forename: Wei-yan
authors.initials: WY
authors.lastname: Yang
authors.forename: Dong-yi
authors.initials: DY
authors.lastname: Han
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D010037:Otolithic Membrane / Q000502:physiology*; D012016:Reference Values; D014724:Vestibular Function Tests / Q000295:instrumentation*; D014796:Visual Perception / Q000502:physiology*