Optimal Rates of Movement for Kinetic Perimetry

Chris A. Johnson, John L Keltner

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Duration, reliability, and sensitivity of kinetic thresholds were evaluated for the 1/4e, 1/ 2e, and 1/1e Goldmann-equivalent targets as a function of stimulus velocity (1° to 8°/s) using the SQUID automated perimeter. For all targets, the average duration of kinetic meridional scans decreased significantly as stimulus velocity increased from 1° to 4°/s. Minimal reductions in kinetic scan times were present for stimulus velocities above 4°/ s. All targets appeared to have reductions in sensitivity at velocities above 4°/s (target detection occurring at more central visual field locations) that were presumably related to the observers' reaction times. There were no consistent differences in the variability of kinetic thresholds for different stimulus velocities. When all factors were considered, a stimulus velocity of 4°/s seemed to be optimal for kinetic scans of all targets in the central and peripheral visual field.

Original languageEnglish (US)
Pages (from-to)73-75
Number of pages3
JournalArchives of Ophthalmology
Volume105
Issue number1
DOIs
StatePublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology

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