Background illumination and automated perimetry

Archives of Ophthalmology
K M Klewin, R L Radius

Abstract

Visual field function in the right and left eyes of 31 normal volunteers was evaluated with an automated projection perimeter (OCTOPUS). Serial visual field evaluations were repeated in these same eyes with neutral filters of increasing optical density. We compared the results of threshold determinations with the different neutral filters in place before the examined eye. Significant reduction in threshold sensitivity at several test spots throughout the central 30 degrees visual field was seen with neutral density filters of 0.5 log units or greater. The low level of background illumination of the OCTOPUS perimeter (4.0 apostilbs) may allow relatively minor reduction in light transmission by the ocular media to produce significant changes in the recorded level of threshold sensitivity during visual field evaluation.

Citations

Nov 1, 1993·The British Journal of Ophthalmology·A R WebsterA R Elkington
Jan 1, 1990·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·M Dengler-HarlesS J Crews
Jan 1, 1987·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·J M WoodS J Crews
Feb 1, 1988·Australian and New Zealand Journal of Ophthalmology·A Sommer
Jul 20, 2018·Investigative Ophthalmology & Visual Science·Ronald A J M BieringsNomdo M Jansonius
Mar 10, 2018·Acta Ophthalmologica·Ronald A J M BieringsNomdo M Jansonius
Oct 7, 2020·Progress in Retinal and Eye Research·Maximilian PfauSteffen Schmitz-Valckenberg

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