Abstract
A silent-substitution technique combined with measures of the visually-evoked potential (VEP) was used to determine whether M- and L-cones are functional in early infancy. Data were successfully collected from twenty six infants in response to three receptor-isolation conditions (rod, M- and L-cone isolation) and a luminance-modulation condition. The efficacy of the receptor-isolation conditions was first verified by measuring VEP responses from both dichromatic and color-normal adults to each of the receptor-isolation conditions. Both 4- and 8-week-old infants demonstrated VEP responses to the M- and L-cone isolating stimuli, though the amplitude of the the responses at 4-weeks were reduced compared to those at 8-weeks. These data suggest that the functioning of M- and L-cones can be differentiated as early as 4-weeks of age.
Original language | English (US) |
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Pages (from-to) | 1753-1764 |
Number of pages | 12 |
Journal | Vision Research |
Volume | 38 |
Issue number | 12 |
DOIs | |
State | Published - Jun 1998 |
Externally published | Yes |
Keywords
- Infant color vision
- Silent substitution
- Visually-evoked potential
ASJC Scopus subject areas
- Ophthalmology
- Sensory Systems