Subtractive processes in light adaptation

M. M. Hayhoe, M. E. Levin, Richard John Koshel

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Abstract

We measured the time course of light adaptation in foveal vision following the onset of an adapting background. Several adaptational steps in the low to mid photoplc range were examined. The time course of multiplicative and subtractive components of the adaptation were extracted from the data. Unlike previous findings there were no subtractive changes for several hundred milliseconds following light onset, and the process took 10-15sec to reach steady state. It seems likely that the fast component previously observed results from effectively instantaneous center-surround antagonism, and that our measurements reflect a second subtractive process involving the slow loss of the d.c. signal over time.

Original languageEnglish (US)
Pages (from-to)323-333
Number of pages11
JournalVision Research
Volume32
Issue number2
DOIs
Publication statusPublished - 1992
Externally publishedYes

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Keywords

  • Early light adaptation
  • Light adaptation
  • Photoplc sensitivity
  • Subtractive adaptation

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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