What's tricky about VR is that because it's not actually far and the headset's lens is doing the bulk of refraction for you, most glasses wearers can and should take off their glasses to use the headset. Here's my understanding of how headset wearing is impacted by different conditions:
Myopia (nearsighted): fine without glasses.
Astigmatism (non-spherical): need contacts with the headset.
Presbyopia (poor focusing ability): fine without glasses except for extreme cases.