title: Canal plane dynamic visual acuity in superior canal dehiscence.
abstract: OBJECTIVE
  1) To characterize normal, horizontal active dynamic visual acuity (DVA) and passive canal plane head thrust DVA (htDVA) across ages to establish appropriate control data and 2) to determine whether horizontal active DVA and passive canal plane htDVA are significantly different in individuals with superior canal dehiscence syndrome (SCDS) before and after surgical repair in the acute (within 10 d) and nonacute stage (>6 wk).
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Tertiary referral center
  
  
  METHODS
  Patients diagnosed with SCDS (n = 32) and healthy control subjects (n = 51).
  
  
  METHODS
  Surgical canal plugging on a subset of patients.
  
  
  METHODS
  Static visual acuity (SVA), active horizontal DVA, and canal plane htDVA.
  
  
  RESULTS
  Visual acuity (SVA, active DVA, and htDVA) declines with age. In SCDS, SVA and active DVA are not significantly affected in individuals after surgical canal plugging; however, htDVA in the plane of the affected canal is significantly worse after canal plugging.
  
  
  CONCLUSIONS
  Age-based normative data are necessary for DVA testing. In SCDS, htDVA in the plane of the affected canal is normal before surgery but permanently reduced afterward.
authors.affiliation: *Johns Hopkins University, Otolaryngology - Head and Neck Surgery, Baltimore, Maryland; †Boys Town National Research Hospital, Department of Audiology, Omaha, Nebraska; and ‡Johns Hopkins University, Physical Medicine and Rehabilitation, Baltimore, Maryland, U.S.A.
authors.forename: Kristen L
authors.initials: KL
authors.lastname: Janky
authors.forename: M Geraldine
authors.initials: MG
authors.lastname: Zuniga
authors.forename: Bryan
authors.initials: B
authors.lastname: Ward
authors.forename: John P
authors.initials: JP
authors.lastname: Carey
authors.forename: Michael C
authors.initials: MC
authors.lastname: Schubert
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012665:Semicircular Canals / Q000503:physiopathology / Q000601:surgery*; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult