My patient is missing the entire corpus callosum. I thought she would have trouble crossing the midline, but that has not been the case. She has also been diagnosed with amblyopia. So far, it is a very interesting case.
The patient I have been working with can cross the midline, but it is not her first response. She avoids working on her right side or using her right hand unless required to. For example if I put some blocks on her right side, she will move them to the left, then use them there.