I finally heard from Dr. L. That was a hard wait. He had some very good news, though, so he redeemed himself:) Judah's brain stem and chiasma looked NORMAL!! Meaning he is not visually impaired and his muscle weakness will most likely be temporary and be resolved in time with growth and therapy. The only question mark left is related to the occipital part of his brain. His white matter here is thin, which means he's at risk to have brain-related vision loss later on in life...however, he has had kids with this same problem, and they're fine! He's very optimistic that Judah will be, too. The lack of focusing and tracking are developmental delays, so we will faithfully "work" with Judah doing therapy stuff each day (really, it's just structured play - I love it) and he will hit these milestones on his timetable.
On another happy note, Judah is smiling more and more! Every day! Thank the Lord for each miracle smile:)