The corpus callosum connects the two sides of the brain. I believe the condition you are speaking of is called agenesis of the corpus callosum, AKA absent corpus callosum, corpus callosum hypoplasia, ACC, CCA, collasal agenesis, or collasal dysgenesis.
If the agenesis is an isolated condition, there may be no symptoms or difficulties with skills that require matching visual patterns. The two hemispheres of the brain can't communicate, thus images seen by one eye aren't connected to images processed by the other. Sometimes there are other associated chromosomal abnormalities, and when the agenesis of the corpus callosum is a part of one of those syndromes, there can be varying degrees of learning difficulties. Check the following link for more specific information.
http://www.healthline.com/gale/Genetic-Disorders/Corpus-Callosum-Agenesis/gegd_0002_0001_0_00104.html
Let me know if you need further information. Please remember to click the accept button if this information is helpful. Thanks. JeanRN