Learning to see: How vision sharpens – The Chart - CNN.com Blogs

Learning to see: How vision sharpens :

"The champion of the infant visual system is motion, which develops early and is relatively difficult to disrupt. At four weeks of age, babies can detect a flickering stimulus in a single location almost as well as adults. Babies can discriminate motion direction around seven weeks and speed by twenty weeks. Perception of global motion patterns, like raindrops seen through the windshield of a moving car, improves rapidly between three and five months and then continues to develop slowly through middle childhood. This aspect of motion processing, the most vulnerable to disruption, is impaired in some developmental disorders, including dyslexia, autism, fragile-X syndrome, and Williams syndrome."

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