Depth Perception (2006) Deficits in Glaucoma Suspects
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A 2006 study investigated depth perception in glaucoma suspects compared to glaucoma patients and controls. 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. Stereocuity was measured by stereothreshold in seconds of arc for each group.
Glaucoma suspects showed significantly increased mean stereothreshold compared to age-matched normals (144.1 +/- 35.2 vs. 26.6 +/- 3.7 seconds of arc). The mean stereothreshold in glaucoma patients was also increased compared to age-matched normals (148.1 +/- 33.8 vs. 26.6 +/- 3.7 seconds of arc).
Glaucoma suspects show depth perception deficits. Evidence of impaired stereovision in glaucoma suspects suggests that binocular interactions are disrupted in the absence of visual field defects using standard automated perimetry.
SOURCE: Gupta N, Krishnadev N, Hamstra SJ, Yucel Y. Depth Perception Deficits in Glaucoma Suspects. Br J Ophthalmol. 2006 May 3; [Epub ahead of print].