M- and L-cones in early infancy: II. Action spectra at 8 weeks of age

Michelle L. Bieber, Kenneth Knoblauch, John S Werner

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Field sensitivities were measured under conditions of M- and L-cone isolation for seven infants (8-12 weeks-old) and two adults, using silent-substitution and the visually evoked potential (VEP). The efficacy of the receptor-isolation conditions were first verified by measuring psychophysical and VEP-derived action spectra from two color-normal adults under conditions of M- and L-cone isolation. M- and L-cone action spectra obtained from the two methods were found to be similar to the Smith and Pokorny M- and L-cone fundamentals, respectively. The VEP-derived action spectra obtained from infants and adults were well fit by the Smith and Pokorny M- and L-cone fundamentals. These data, in conjunction with our previous study, confirm that M- and L-cones are operating by 8 weeks and possibly as early as 4 weeks of age.

Original languageEnglish (US)
Pages (from-to)1765-1773
Number of pages9
JournalVision Research
Volume38
Issue number12
DOIs
StatePublished - Jun 1998
Externally publishedYes

Keywords

  • Development
  • Infant color vision
  • Photoreceptors
  • Silent substitution
  • Visually evoked potential

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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