Effects of target size and eccentricity on visual detection and resolution

Chris A. Johnson, John L Keltner, Frank Balestrery

Research output: Contribution to journalArticle

70 Scopus citations

Abstract

Detection and resolution threshold sensitivity profiles were determined for five target sizes along the horizontal meridian of the central 60° visual field (30° nasal and temporal), utilizing the Tübingen perimeter. In general, increases in stimulus eccentricity and/or decreases in target size produced a decrement in both detection and resolution sensitivities. Magnitude of this effect was much more pronounced for resolution than detection, and the two functions appear to reflect relatively distinct, separate response characteristics. A possible physiological basis underlying the differences between detection and resolution properties is described.

Original languageEnglish (US)
Pages (from-to)1217-1222
Number of pages6
JournalVision Research
Volume18
Issue number9
DOIs
StatePublished - 1978

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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