Anyone tried reducing CYL while increasing SPH?

I wonder if anyone has experience with lowering CYL by converting it into SPH.

Can you share your experience?
Tips, pitfalls?


I have done this once, and a bunch of variations of dropping various bits of cylinder, as well as several variations (holding sphere steady and dropping cylinder for a round, i.e., x/y OU -> x/y+0.50 OU.

Like a reduction, the smallest possible exchange is likely to be most comfortable. Larger exchanges bring no benefit (it’s the same thing as reducing too much), because your eye has to “pass through” those changes of refractive state, anyway.