Been wearing glasses since I was 10 or 12. In the past 2 yeaars or so I also developed presbyopia so moved to bifocals. Found then PITA so I just had a normal pair of glasses (myopia + astigmatism) and a reading pair (presbyopia). Now I can see the GG and use the loupe with no problem. Before that I took off the glasses to check the GG, but it wasn't always easy.
For WLF I can still use the normal glasses with the magnifier and all seem OK.