Hi. I'm online and happy to answer your question today.
The person best trained to deal with double vision, that may be causes by eye crossing etc, is a pediatric ophthalmologist. Not only do they deal with kids but the deal with double vision problems too.
A simple solution to this complex problem is to wear a patch over one eye or put scotch tape over the lens of her glasses on one side. This treats the symptoms but, of course, doesn't address the underlying problem.
ok, thanks, XXXXX XXXXX that a try.