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Hi Tony, I've just had a quick go with my LV25mm. With glasses on I cannot see the field stop, so yes the Field of View is restricted. Vixen give the eye relief of the LV25mm as 20mm, so I think having your eye 35mm away from the eye lens is pushing it a bit. If you just hold the eyepiece by the chrome barrel and pull the rubber eye shield it will come off completely.
I think your LV25mm would give you about x80 in your LX90 with an exit pupil of around 2.5mm (assume F10 200mm), my astigmatism is -1.25 in my observing eye and I find that the astigmatism not really noticeable once the exit pupil gets down to that sort of size, but obviously I don't know how bad your astigmatism is.
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