There are lots of companies making Rift/Vive/VR specific glasses out there - for a hundred dollars or less, some of them, you can get specific prescription lenses made to fit exactly into your headset. I do what Skuzzy does when I wear mine, my script hasn't changed much in the last 6 years, and I have a number of pairs that are made with narrow frames specifically to fit under goggles, and they work great in the Rift. A tip I picked up from someone here is get one of those cheap fans with the clamps, and point it towards your head while flying, if you have any issues with lens fogging, this fixes it pronto. Contacts work fine in the VR units too, and that's what I typically use. My script isn't all that strong, in the low 2's both eyes, yet without them, it's pretty hard to see without squinting in VR (I'm near sighted).
Pretty telling about HTC and Rift CS calls - I have about 40 VR games now, and the vast majority are for the Rifts, my Vives sit pretty idle, in fact there is only one game I play regularly with the Vive, and that's Onward. IMO HTC has the best flight sim/cockpit VR game out there, plus incorporating the view system the way they did is something other large jet games haven't figured out yet, putting you at a massive disadvantage in dogfights in VR in those other games. Combining the hat/keypad views with VR works perfectly in VR in AH3 IMO.