The other night under Sydney skies, I got sick of glasses off and on when using my binoculars (I'd forgotten to bring my "strap" so I could dangle them
), so I refocused for my glasses and found that worked OK. I have multi-focals, so I had to be careful of my head position relative to the eyepieces, but I got the hang of it. I'll have to continue to experiment, but I suspect with the scope, I'll still prefer to observe without glasses. (ps. helps to have your glasses sparkling clean as well!)