[astatine]

I find that, when I lie down, my glasses slip back closer to my eyes just enough to make things go out of focus at reading distance. The weight of the prisms could make it worse. Have you figured out some solution for this? If you have, it could be a game changer for me!

[crazygringo]

I haven't tried it, but maybe some larger nose bridge pads with a bit of friction, that would maintain the distance?

Might require you to use a dedicated pair of glasses just with this, if you need some kind of spacing/padding element affixed that you don't need otherwise.