Abstract
We compared infants' ability to detect single lines of varying width in the temporal and nasal visual fields. The smallest lines detected by 1-month-olds at 20° in the nasal visual field were more than eight times wider than those detected at 30° in the temporal visual field. In contrast, 2-month-olds detected smaller lines at 20° in the nasal visual field than at 30° in the temporal visual field. Converging evidence suggests that the observed improvement between 1 and 2 months in detection in the nasal visual field reflects the maturation of a projection from the retina through the visual cortex to the superior colliculus.
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