Just an update for everyone, I got my “experimental astigmatism challenge glasses for close-up” with +0.5 SPH and +0.5 CYL along the axis of my astigmatism (so these don’t compensate for my astigmatism instead they make the effects more pronounced, they’re plus lenses not minus) and they actually seem to be working better than I hoped they would. With my laptop computer I can actually induce some astigmatic blur at an ergonomically functional distance, and I can pull the computer in a little closer to where I can clear the blur with AF.
If I look around the room with the glasses on the view is crappy, I can still see everything but it’s ugly. For close up work it’s fine. Now the fun part is when I take the glasses off the astigmatism is markedly reduced. I’ve tested with the digital alarm clock on the far side of the room, it’s perfect with both eyes, so-so with my right eye, and still kind of a mess with my left eye (which was weaker and had -0.75 CYL as measured a few months ago by the optometrist.)
With the experimental glasses on I can get the glitching out on the vertical lines with the screen at arm’s length, when I take the glasses off I can stand on the other side of the room and see everything great with both eyes, nice black lines everywhere, with individual eyes the vertical lines start slightly graying.
Anyway, it’s a big (noticeable) improvement over where I was a week ago. I spent several hours outside today and I can see almost as well with my naked eyes as I can with -0.25 CYL correction in each eye. Antennas on rooftops are all nice and sharp, no double lines or ghosted images, streetlights look pretty good at night uncorrected. I was actually able to take my corrective glasses on and off and get the same view with naked eyes, which is an improvement, because before the -0.25 CYL lenses were providing a pretty dramatic visual improvement.
Wearing my originally prescribed astigmatism-correction glasses for a few minutes leaves my eyes looking like absolute trash as soon as I take them off, these “challenge” glasses for close-up have the opposite effect. They’re pretty comfy for near work and haven’t caused me a headache yet. There’s a bookcase across the room from me and the titles on the spines of the book provide a nice “eye test”, ghosting and double-images on the letters on the spines of the books is completely clear after taking of the challenge glasses, not-so-good after using the laptop with naked eyes, and really lousy after wearing corrective lenses for even a few minutes.
Anyway, based on the collective EM Community’s experience the “plus lens” thing seems to be more trouble than its worth for low myopia, but maybe it can actually do something useful for low functional astigmatism. Mildly exacerbate the astigmatism by half a diopter or for near work (where it’s barely noticeable) to provide a little stimulus to the emmetropization system through “text pushing”.
If I understand other people’s experiences, higher myopes seem to be able to drop up to a diopter of CYL correction in their differentials. Perhaps low astigmats can actually throw in some CYL plus-challenge in their “computer lenses” since there’s not really a need for differentials with no myopia.
Anyway, so far it’s working better than I thought it would. If I start getting weird or annoying side-effects or problems I’ll update this thread.