Here it is.
Stupid “Chinese eyes” exercise that I did do very often, year by year, and tens of minutes at some days. It was my main life-saver when I needed 20/20 sight.
Also, here is a rough reading from my cm ruler when doing that:
Right sphere -4 cylinder -8 axis 150-160
Without: sphere -8 cylinder -2.25 axis 180
Must to notice that I mostly did do that on my right eye (was no real improvement when did do that on left eye), and my right eye has worse astigmatism than left.