I wear progressive glassess, with the same problems everyone else experiences. For LF work, I had to position the loupe, then move my head (and glasses) to find the "sweet spot". But I found a better way--I now use an "Optivisor" with the attached accessory loupe. I put the Optivisor on like a cap when under the darkcloth (and also wear my glasses). By itself, the Optivisor has about 2.5x, but with the loupe about 5x. Im considering getting the stronger main lens, about 4x, so it would give about 7x with the attached loupe.