Another thing about Developmental Optometrists is that you should get second opinions, just like with any other doctor. My ds6 went to one that gave him glasses he liked and suddenly decided to change them to bifocals at the beginning of the school year. I went back three times to ask him to change them back and he wouldn't.
We found another DO that retested DS6, agreed with the previous diagnosis, but is giving DS6 something like his original prescription back and has recommended some Vision Therapy.