Evaluation of Glaucomatous Visual Field Loss with Locally Condensed Grids Using Fundus-Oriented Perimetry (FOP)

Abstract

Purpose We compared detection rates of glaucomatous visual field defects (VFDs) between a conventional rectangular stimulus grid and locally condensed test point arrangements in morphologically suspicious regions. Methods Humphrey Field Analyzer model 630 (HFA I, program 30-2 with a rectangular 6° × 6° grid) was used as the conventional perimetric method. Individual local test-point condensation was realized by fundus-oriented perimetry (FOP) on the Tuebingen Computer Campimeter (TCC). Results Of a total of 66 glaucoma patients, or suspected sufferers, 23 showed normal findings and 27 showed pathological findings with both methods. In 15 cases we found normal visual fields in HFA 30-2, whereas FOP revealed early glaucomatous functional damage. Only one case showed pathological HFA results, while FOP was normal. Detection rates of VFDs significantly differed between the two methods (p < 0.001; sign test). Conclusions FOP, using individually condensed test grids, significantly increases detection rates of glaucomatous VFDs in morphologically suspicuous areas compared with a conventional HFA 30-2 technique using equidistant rectangular (6° × 6°) test point arrangements.

Age‐dependent normative values for differential luminance sensitivity in automated static perimetry using the Octopus 101

“…at the borders of scotomas) are a promising option for efficient delineation and follow-up of glaucomatous VF loss (Schiefer et al 2003b). An optimized grid was initially developed (Schiefer et al 2001a(Schiefer et al , 2001b(Schiefer et al , 2003a(Schiefer et al , 2003b) on a prototype campimeter, the Tu¨bingen computer campimeter (TCC) (Wabbels et al 1995). This test point arrangement was intended to reflect physiological VF characteristics (such as distribution of photoreceptors) as well as to take into account the abovementioned knowledge of glaucomatous VFs.…”

Konventionelle Perimetrie

“…Hierdurch kann sich eine perimetrisch sinnvolle Rasterverdichtung z. B. an Nervenfaserbündeldefekten orientieren und somit ortsbezogen erfolgen [65,66]. Aktuelle Studien mit verdichtetem Prüf-punktraster konnten nahe am Gesichtsfeldzentrum gelegene und somit besonders bedeutsame Gesichtsfelddefekte aufzeigen [41,67].…”

Correlating nerve fibre layer defects spatially with functional loss

“…Using individually condensed test grids focussed on morphologically suspicious areas thus increases the sensitivity for VF defect (VFD) detection compared with conventional (6 Â 61) rectangular stimulus arrangements. 5 Algorithms can be applied to the construction of a local condensation of the test point, according to the suspected underlying basic pathology -notching of the optic disc, for example.…”