I have myopia (-1.5) and slight astigmatism. When I look through binoculars or my eyepiece I always take my glasses off. Is it wrong? I think I can see just as well as wearing glasses but of course my eye is closer to the lens and I see a wider FOV.
If your eyepiece has adequate eye relief, you can see the entire field of view while wearing eyeglasses.
I much prefer wearing eyeglasses while using binoculars for three reasons. First, I almost always wear my glasses for "naked-eye" viewing, because I can see many more stars with my glasses on (but using no other optical aid) than I can with just my own eyes and no artificial aids whatsoever. When observing with binoculars I switch constantly back and forth between the "naked-eye" view and the binocular-aided view, and this is a whole lot less convenient if I have to take my glasses off every time I put my binoculars to my eyes.
Second, I use the eyeglasses as an extra contact point to give the binoculars more stability. And finally -- but least important by far -- I have moderately strong astigmatism, so I get a significantly sharper view through any low-power instrument with glasses on.
Given that, I always try to select binoculars with enough eye relief to use them with glasses on.
But when viewing through a telescope, I usually take my glasses off. Actually, as often as not, if I was already wearing glasses I'll keep them on, but if they were already off I'll leave them off.
Regardless, whatever works for you is best.