title: Depth perception deficits in glaucoma suspects.
abstract: OBJECTIVE
  To investigate depth perception in glaucoma suspects compared to glaucoma patients and controls.
  
  
  METHODS
  Glaucoma suspects (n = 16), patients (n = 18), and normal age matched controls (n = 19) aged 40-65 years were prospectively evaluated for depth perception deficits using the Frisby test. Stereoacuity was measured by stereothreshold in seconds of arc for each group.
  
  
  RESULTS
  Glaucoma suspects showed significantly increased mean stereothreshold compared to age matched normals (144.1 (SE 35.2) v 26.6 (3.7) seconds of arc; p = 0.0004). The mean stereothreshold in glaucoma patients was also increased compared to age matched normals 148.1 (33.8) v 26.6 (3.7) seconds of arc; p = 0.0004).
  
  
  CONCLUSIONS
  Glaucoma suspects show depth perception deficits. The impaired stereovision in glaucoma suspects suggests that binocular interactions can be disrupted in the presence of normal visual fields by standard achromatic automated perimetry.
authors: Glaucoma and Nerve Protection Unit, Department of Ophthalmology and Vision Sciences, University of Toronto, St Michael's Hospital, Toronto, Ontario, Canada, M5B 1W8. guptan@smh.toronto.on.ca
authors: N
authors: N
authors: Gupta
authors: N
authors: N
authors: Krishnadev
authors: S J
authors: SJ
authors: Hamstra
authors: Y H
authors: YH
authors: Yücel