title: Optic nerve head stereoscopic digital imaging using bichromatic techniques.
abstract: The variability of optic nerve parameters obtained with versions 3.4 and 3.5 of the Topcon IMAGEnet computer stereo analysis system was studied. The consistency of horizontal cup-to-disc ratio, vertical cup-to-disc ratio, cup volume, neuroretinal rim area, neuroretinal rim-to-disc area, and the percentage of poorly correlated conjugate points (bad points) on the stereo pair was compared. The updated computer program for stereo analysis provides a significantly more accurate means to assess both the cup volume and the neuroretinal rim area as evidenced by the smaller number of bad points.
authors.forename: B
authors.initials: B
authors.lastname: Rector
authors.forename: B J
authors.initials: BJ
authors.lastname: Ludwig
authors.forename: J E
authors.initials: JE
authors.lastname: Terry
mesh_terms: D003116:Color; D003867:Depth Perception; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D009900:Optic Nerve / Q000033:anatomy & histology*