title: Vertical fusional amplitudes in patients wearing vertical anisometropic correction.
abstract: OBJECTIVE
  To examine the relationship between vertical anisometropic spectacle correction and vertical fusional amplitudes in patients.
  
  
  METHODS
  Comparative observational case series.
  
  
  METHODS
  Twenty-one patients exposed to greater than 0.5 diopters of vertical anisometropic spectacle correction were compared with 46 patients not exposed to anisometropic correction.
  
  
  METHODS
  Vertical fusional amplitudes were recorded in all patients using a prism bar.
  
  
  METHODS
  Vertical fusional amplitudes and vertical anisometropia.
  
  
  RESULTS
  In patients exposed to greater than 0.5 diopters of vertical anisometropic spectacle correction, vertical fusional amplitudes measured 5.2+/-1.4 prism diopters. Patients not exposed to anisometropic correction had vertical fusional amplitudes of 2.7+/-1.2 prism diopters (P < 0.0001).
  
  
  CONCLUSIONS
  Patients with vertical anisometropic correction have increased vertical fusional amplitudes. This finding is relevant when evaluating patients with ocular motility disorders, especially with regard to distinguishing acquired versus longstanding deviations.
authors.affiliation: Cleveland Clinic, Ohio, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Griebel
authors.forename: C D
authors.initials: CD
authors.lastname: Riemann
authors.forename: E L
authors.initials: EL
authors.lastname: Szymusiak
authors.forename: G S
authors.initials: GS
authors.lastname: Kosmorsky
mesh_terms: D015858:Anisometropia / Q000503:physiopathology / Q000628:therapy*; D005139:Eyeglasses; D006801:Humans; D015348:Vision, Binocular / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*