Zero diopter reset

When introducing a reduction it is not advised to just slap them on your face, as a rule you never want to wear your new lower normalized on the same day as your full correction or previous normalized correction. It is better to do a "zero diopter reset" (or in the cases of high myopia probably wear differentials for this).

Normalized

What you do is take a day you can manage with no correction (or low correction in the case of high myopia) from the beginning of the day for as long as reasonably possible. This way when you introduce your new normalized the relative standard for expected clarity is that things are much clearer and this is a good change. The good association with your new correction is a big advantage.

Differentials

If you already wore the previous differentials, do not wear the new differentials until the next day.

References

Hear it from Jake: https://www.youtube.com/watch?v=zzrQb4pCFkQ