Behavioral Optometry

I was speaking to a mom friend today who was telling me about her son and how he has been going to a behavioral optometrist. I have never heard of this! Her son had been experiencing what seeed like sensory disorder. He would lean on her whenever she was nearby. He would freak out sometimes when people entered into his personal space. He was in a classroom of 8 children and often could not cope. Obvi, when you hear these symptoms, you think oh, ADHD or sensory perception disorder.