Hi, I have a couple of thoughts for you. First, you should measure your PD (pupilary distance). You can do it in a mirror with a ruler, you just want to look straight ahead and measure from the center of one pupil to the center of the other pupil in millimeters. If you went to an eye doctor you can probably call them and ask for your PD over the phone and they should give it to you (in the USA they’re required to, not sure about UK.)
Second, if your astigmatism isn’t caused by something like cataracts you can probably get rid of most of it or all of it over time. I first was told by the optometrist I had some it was at -0.75 in my bad eye, but I found -0.25 worked just as well and when they re-measured I’m down to -0.25 in each eye. The exercises seem to work, it’s not entirely clear how much of the astigmatism is really in the eyeballs and how much is just a mental thing. With a little practice, as you probably discovered, you can “clear up” the blurry lines on the astigmatism wheel. Now when I measure at home I don’t detect astigmatism.
Third, Some people are able to trade their CYL astigmatism correction for half as much SPH, so if you had -1D astigmatism, you could try -0.5 SPH.
This is not advice:
If they measured me at:
R sph -0.25. Cyl -2.75 axis 80
L sph -0.50 Cly -2.25 axis 86
Here is what I personally would order for normalized:
R SPH -0.5 CYL -2.0 axis 80
L SPH -0.5 CYL -2.0 axis 86
That way you’re starting off with about the same correction in each eye and you can work it down from there.
If I wanted something to use in front of the computer (differentials) I would try:
R SPH 0 CYL -1.0 axis 80
L SPH 0 CYL -1.0 axis 86
Or you could just use your naked eyes in front of the computer if using the computer doesn’t bother you.
Measure your PD and call wherever you had your eyes checked and ask them for your PD too. It literally takes 30 seconds or less with a ruler and a mirror. Good luck!
Edit: Also, if I were you I would keep doing the astigmatism exercises whenever you’re bored. They seemed to work for me, or at least it didn’t take me too long to get better at clearing up the blurry lines and now it doesn’t seem to be a problem any more. I would just treat it like a video game for a couple of minutes at a time when you’re in the mood for it.