My DD is only 5, and hasn't been DX with ADD or ADHD, but has many of the symptoms. She started a constant and repetitive eye blinking about 8 months ago. We have taken her to her ped, a nero, and an eye specialist, and everything was normal. The nero said possible tourette's syndrome, but they can't DX that with only one tic. So for now that are just calling it a facial tic.