Hi and welcome to the Chiari forum.
I am so sorry ur little guy is dealing with these issues.....and that u and ur wife are going thru this as well.it can be a very frustrating journey to get a dx....but we will help the best we can.
I am not up on how to identify chiari symptoms on a child of only 7 months...the eyes shaking sounds like Nystagmus....many chiarians develop this issue.
In addition to a MRI of the brain and cervical spine, a CINE MRI is a study of CSF flow... with chiari most times NS look at the size of herniation, but that is not as important as CSF flow or lack of flow and overcrowding.
Also the best thing I can tell u is be sire u have a true chiari specialist...and one that is a peds chiari specialist.
We do have a thread with a list of drs, but it does not indicate if they deal with adults or children on our list...we do strongly suggest u research ne and all drs u r interested in
seeing.
http://www.medhelp.org/posts/Chiari-Malformation/LIST-OF-CHIARI-SPECIALISTS/show/1121460
We r happy to have u join ue here, but not for the reason u had to seek us out.
"selma"