Hi,
I posted a lot of information in this previous post on this topic, based on 30 years experience of observing with glasses on off sideways and every which way.
http://www.iceinspace.com.au/forum/s...ad.php?t=34789
What I can also tell you is that Televue's Dioptrix is the answer for only some people and not the answer for a lot of people, me included.
Cheers,
John B