I guess I am unclear on the parameters Phil? Is this for the prairie where she is trying to view from miles away? Or in close up brush where magnifiction is not the issue, its wide angle and quick focus?
I don't think I have ever seen as many monoculars for sale at any given time, from featherweight necklaces to 12 pound spotting scopes. I see about a dozen or more models under 20 bucks and plenty of higher standard models too.
I would just get her a selection of inexpensive scopes to try first. Narrow it down to the right neighborhood and then look for a better one if needed.
For my own local close quarters birds, I keep a miniscule 8X20 at the back door I got for like 4 bucks and its a fun little scope. I probably have 6 pair of binoculars and several old fashioned field glasses, ok ok, some opera glasses too. heehehe Telescope, microscope, optical comparator and magnifying glasses galore. Guess I am just a little bit of an optics junkie.
Not the egotistical "have to have the best" type. Just a guy who looks to get what I need and doesn't want to pay more for it than I need to. (I got a pair of antique opera glasses completely covered outside with pearl, for like 10 bucks one time :)
I can't use --anything at all-- with my eyeglasses on though.
Have to focus the scope to your eye in advance and quickly drop the specs to view.
Putting a string on your glasses so you can just drop them away, is a help to me.
yours Scott