Yeah it's difficult. Mine are 3rd Gen goggles that are 25 years old. Still better than most civilian stuff, but not as good as newer stuff. I'd like to get a PVS-14 monocular, but that's gotta wait until I have a bunch of disposable income.
It difficult because to get it to focus on the face, the stars go out of focus. I really wanted the stars to look better. So I kind of had to try and get as close as I could to both, leaning towards the stars.