I am not sure of the exact nature of his processing issue. I have always been told that he processes slowly. In addition he did have vision therapy due to the fact that he did not use his eyes together. Rather each took in a separate picture. He also had issues with tracking and teaming.

Here are the subtest scores.
Verbal Comprehension
Similiarities 21
Vocabulary 21
Comprehension 22

Perceptual Reasoning
Block Design13
Picture Concepts 14
Matrix Reasoning 12

Working Memory
Digit Span 13
Arithmitic 12

Processing Speed
Coding 5
Symbol Search 9
(Cancellation) 7