Dd is nearly 7 and reads at a 3rd grade level, but has troubles that sound like your son's. She loses her place on the page and her eyes tire very quickly. Pediatrician referred us to a neurodevelopmental optometrist (behavioral optometrist) after she heard dd read aloud, even though she kept commenting that she had never heard a "first grader" read that well before. I had to give more info to "prove" that dd's reading frustrations were a possible issue. She asked dd what she was working on in math and whatnot.
Dh and his dad have similar issues and avoid reading for pleasure. I'm suspecting tracking issues or dyslexia. Really hoping it's not dyslexia! I've heard visual therapy can really help with the tracking.
I'll post with results of the testing when we get them.
