I switched up my differentials to -2.00 (from -1.50). Not because I cannot see with them But moved the screen from ~50 cm back to ~70 cm. I don’t use mobile phones almost at all since home office and since I stopped gaming on them. Also can read books or use phone without glasses. So I only use differentials for PC screen which I can move as far as I want. Also this way differentials are usable on kitchen counter height, so more blur challenge opportunity In some sense the idea came from @Varakari’s “indoor normalized” idea, just from the other direction.
Anyhow while the main idea came from my “relaxed focus” - “peripheral promotion” experiment (if the screen is farther it’s easier to not tunnel-focus on it) I realized it has another huge advantage. Having a smaller diopter gap between my normalized and differentials (-3.00 normalized, so it was -1.50 with the old differentials and -1.00 with the new) also results in a much wider “edge of blur”*. With the old differentials moving around 3-5 cm back was the difference between “full clear” and “almost unreadable”. Now it’s 30 cm! (just measured ) Which makes it’s much easier to stay in the edge of blur, without straining my visual system.
* which again a misnomer It should be something like “transition zone (from clear) to (unreadable) blur” or “clearable blur zone” or something like that But it’s not a “line” which the word “edge” suggests.
@Lajos maybe this is the cause of the problem you mentioned in this topic too?
What is the diopter gap between your differential and normalized?