Thanks for the support, everyone.
I feared my post was a bit lengthy, but having been on the other side, you never know which part is going to resonate with another parent.
As for the recommendation, my friend has been doing Occupational Therapy for her HG+ son. The OT recommended her son see this behavioral optometrist. My friend had a great experience (her son did need to correct vision in one eye). I checked out the optometrist's website and it even had a section on gifted and learning disabled children. Then when I checked on the website I've seen recommended here in the past (
www.covd.org) and saw this same doctor's name, I felt the stars had aligned.