Time course of early mesopic adaptation to luminance decrements and recovery of spatial resolution

Celeste M. Howard, Stephen J. Tregear, John S Werner

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


The time course of recovery of spatial resolution following adaptation to a uniform field was measured for test probes presented at lower illuminance than the adapting field. Six observers were tested in a Maxwellian-view system using 20°adapting fields of 1.6-2.6 log photopic trolands. Test stimuli were 7°, 250 ms Gabor patches (1 and 6 cpd) of mean retinal illuminance 2-3 log units lower than the adapting field. During the 9 s after adapting field offset, contrast thresholds for orientation discrimination followed an exponential-decay function and showed longer recovery times for larger illuminance decrements and higher spatial frequency. Copyright (C) 2000 Elsevier Science Ltd.

Original languageEnglish (US)
Pages (from-to)3059-3064
Number of pages6
JournalVision Research
Issue number22
StatePublished - Oct 2000
Externally publishedYes


  • Aging
  • Contrast sensitivity
  • Dark adaptation
  • Light adaptation
  • Mesopic sensitivity
  • Night vision
  • Visual acuity

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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