Scotopic contrast sensitivity in infants evaluated by evoked potentials.
The contrast sensitivity function of infants 2 1/2 to 6 months old has been obtained at mean luminances of 6 and 0.06 cd/m2 by recording visual evoked potentials in response to simusoidal gratings of various spatial frequencies alternating in phase at 8 Hz. The scotopic contrast sensitivity develops earlier than the photopic contrast sensitivity, reaching values very close to those of the adult between 4 and 5 months of age. This suggests that mechanisms responsible for adaptive changes of receptive field organization from night to day vision are not yet mature at this age.
D000328:Adult; D000367:Age Factors; D003623:Dark Adaptation; D005071:Evoked Potentials; D006801:Humans; D007223:Infant; D010775:Photic Stimulation / Q000295:instrumentation / Q000379:methods; D014785:Vision, Ocular / Q000502:physiology*