If you wear glasses for distance vision you can wear them while you VR, but be sure you install the glasses spacer that came with your headset so the headset lenses don’t get scratched.
If you don’t want to wear glasses during VR sessions you can order prescription lenses. This isn’t an area we know much about, so are just passing on some information we’ve heard from other users.
www.VR-Wave.store We’ve seen good reviews about this one about the quality and speed of delivery.
www.VROptician.com We haven’t verified, but have heard from others that they can’t do complex prescriptions like prism correction.
www.adlens.com (UK only)
www.reloptix.com We hear they have lenses that are easily popped in and out, ideal if you share a headset with somebody else.