Hi Sam,
My daughter, who is now 22 months old, started having seizures at 2 months old and wasn't diagnosed with Pachygyria until 1 year old. Her seizures were mostly under control by 1 year old. She did ok with her milestones until around 5 months old. But is now delayed. Her hearing is fine, but her vision is impaired, but improving. I hope your son continues to do well. It seems like the past two years have just been "wait and see how she does" - no one knows what to tell you what to expect, which is very frustrating. Good luck to you guys
Amy