Optic disc surface smoothness and visual field indices

Abstract

The ability of ODSS to reflect the level of visual field change in glaucomatous eyes appears to be rather limited, even if statistically significant. This fact does not limit the clinical usefulness of ODSS as a diagnostic parameter in consequence of its strong correlations with the other morphometric parameters and its high sensitivity and specificity in separating normal from glaucomatous eyes.

Linear Discriminant Functions to Improve the Glaucoma Probability Score Analysis to Detect Glaucomatous Optic Nerve Heads

“…Although new parameters besides the classic stereometric parameters have already been introduced by several investigators, [42][43][44][45] none has succeeded in reaching a very good diagnostic precision. However, we have to outline that, even though RA was a contourline-dependent parameter, it had good diagnostic capacity in this study and is a parameter that can be easily evaluated by physicians.…”

Detection of glaucomatous optic nerve head by using Heidelberg topographic maps

“…In 1997, Rolando et al 26,27 introduced a new optic disc morphometric parameter, the optic disc surface smoothness (ODSS), based on the ability of these computerized system to provide the position of a large number of points placed on the surface of the ONH. The ODSS was the results of the evaluation of the relative position of a large number of points located on the surface of the ONH, and it was thought to be less influenced by the reference plane and not by the contourline.…”

Three-dimensional optic nerve head algorithm for the detection of glaucomatous damage

“…These instruments offer reasonably reliable measurements of the three-dimensional shape of the ONH which could be used clinically, alongside traditional bi-dimensional parameters such as rim area, disc area, rim/disc area ratio and cup/disc ratio [1,2,9,17]. Based on the ability of these computerised systems to provide the position of a large number of points on the surface of the optic disc, the purpose of this study was to determine the ability of a three-dimensional algorithm -the third moment or cup shape measure (CSM), already used in confocal scanning laser ophthalmoscopes, such as the Heidelberg Retina Tomograph (HRT) -to differentiate ONHs with a normal visual field from those with an abnormal visual field, even when a simultaneous stereoscopic system was used.…”