I found out last week that there are prescription inserts for headsets. I’ve yet to get mine, but as someone who wears glasses the concept sounds awesome. https://vroptician.com/prescription-lens-inserts/valve-index...
I think it would be neat if Valve made it so you can more easily pop the lenses in and out, allowing you to pick what you need prescription wise (and in your case fresnel vs non-fresnel). I am unsure how well that would work, since the focal distance between headsets could change.