The aim of this work was to compare contrast sensitivity curves for radial (rCSF) and sine-wave gratings (CSF) stimuli of 0.25, 0.5, 1 and 2 cpd in 6 to 13 year-old-children. It was measured the contrast thresholds of 40 children using the psychophysical forced-choice method and low luminance levels. All children were free of identifiable ocular diseases and had normal acuity. The results showed that contrast sensitivity of the children was higher for spatial frequencies (CSF) than radial frequencies (rCSF). The results suggest that these stimuli can be processed by different visual cortical areas.
visual perception; contrast sensitivity; visual development; radial and spatial frequency; forced-choice method
