Since you are so far from a store, I suggest you try to find some bird watcher forums. I'm sure there are tons of them. You will likely find discussions of this very question - especially since she needs greater eye relief as a glasses wearer. She will likely do best with an 8 power pair. 10x gets heavier. Also, stay away from the compact binoculars. My wife likes hers but only because they are light-weight to travel with. Full-size with a larger objective lens like a 40 mm will be brighter for birds in the shade of trees.