It is possible that I “gained” my astigmatism quite quickly.
In 2018 summer, wore my old -4 and then my new Rx sph -5 both at once when I needed instant work for 20/20 vision (e. g. housekeeping).
I seen with that very reliably, 20/25 was very readable (my chart did not have 20/20, but I definitely seen 20/20 with them).
But now, things are not that readable with that setup.
So I assume my astigmatism is not lens-induced: the last cylinder I had in 2009-2014 sph -1 cyl -0.5 ax 90. Then, I had not any cylinders up to 2 months ago.
Now my right cyl is -2.25 ax 180, left cyl is -1.75 (-1.5) ax 170.
Maybe that is blur adaptation (new Rx was -5 when I needed -9) or so?