Marcie Kustwan
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        I don't know what any other possible causes are other than injury to the cerebral cortex between 6 and 22 weeks and heredity.  What test did you have done that determined it wasn't genetic in nature?  I am interested because I have a daughter who was born with septo-optic dysplacia and this is often times coupled with hydrocephalus.