J.K.
My son did eye therapy, and the pencil exercise is one of them to do. We also had a ball on a string, and I hung it up in the doorway, had him lay down on the floor under it, and i let it sway back and forth, and in circles, and had him follow it with his eyes. He had trouble with reading and this really helped him with his lazy eye. The dr also had him cross his eyes too, to make the muscles stronger. It helped with everything. Glad we did it but it was a bear to get him to do this everyday. I'm glad those days are over!!