If your daughter cannot provide, County Comm sells a 'training version' of the GI lensatic compass for $11.50 plus the gig for shipping. Standard disclaimer and I have no experience with this particular model.
http://www.countycomm.com/trainingcompass.htm The difference with that one is that it is liquid damped rather than induction damped like the real one. Should be fine to test the lens arrangement, though.
That's just a Brunton 9077 without marking, no need to go through county comm to get one.
Edit actually it's not, but but close enough you can get a brunton from local store to play with.
Thanks for the ideas. I never thought about buying a cheaper "trainer" just to test if the real deal might work with my eyes.
I also found where you can get a pair of these trainers for $13.47 (member price) at SportsmansGuide:
http://www.sportsmansguide.com/net/cb/cb.aspx?a=459641I previously had written these off as junk imitations, but they might well be useful to test for eyesight issues and to play around with.
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