Hi msnyder- sorry to hear about your daughter. As another newcomer to this scenario I now realize this needs much more awareness and less pressure to return to school athletics.
Found this from a link in Lara's post:
http://www.strabismus.org/intermittent_exotropia.html
My vision is a mess as well -- at least your daughter has youth on her side...good luck with the appts & keep us posted.
Grace