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 language | English (US) |
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Pages (from-to) | 1765-1773 |
Number of pages | 9 |
Journal | Vision Research |
Volume | 38 |
Issue number | 12 |
DOIs | |
State | Published - Jun 1998 |
Externally published | Yes |
Keywords
- Development
- Infant color vision
- Photoreceptors
- Silent substitution
- Visually evoked potential
ASJC Scopus subject areas
- Ophthalmology
- Sensory Systems