I have glasses with straight arms, and an elastic band connecting them behind the head. Being farsighted, I constantly pull the glasses over the forehead and back into position when looking at far or near objects. The eventual mask is pulled low under the chin, sometimes my ears assume the Mad Magazine cover aspect, but there is no conflict between mask and glasses.
Let me add that there are mask models already provided with a small soft spongy strip on the inside of the mask, just opposite the nosepiece. Thwse models effectively block the air from fogging your glasses. Even putting your glasses on top of the mask is effective, but a little awkward if you have small lenses like those of some reading glasses.
Ciao from Massimo