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Br J Ophthalmol 2006;90:979-981 doi:10.1136/bjo.2006.091025
  • Clinical science
    • Scientific reports

Depth perception deficits in glaucoma suspects

  1. N Gupta1,2,3,4,
  2. N Krishnadev1,2,
  3. S J Hamstra2,5,6,
  4. Y H Yücel2,3,4
  1. 1Glaucoma and Nerve Protection Unit, St Michael’s Hospital, Toronto, Canada
  2. 2Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Canada
  3. 3Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
  4. 4St Michael’s Hospital Research Institute, Toronto, Canada
  5. 5Department of Psychology, University of Toronto, Toronto, Canada
  6. 6Department of Surgery, University of Toronto, Toronto, Canada
  1. Correspondence to: Neeru Gupta MD, PhD, FRCSC, DABO, Glaucoma and Nerve Protection Unit, Department of Ophthalmology and Vision Sciences, University of Toronto, St Michael’s Hospital, 30 Bond Street, 8-072 Cardinal Carter Wing, Toronto, Ontario, Canada, M5B 1W8; guptan{at}smh.toronto.on.ca
  • Accepted 3 April 2006
  • Published Online First 3 May 2006

Abstract

Aim: 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.

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