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Very interesting reading, thanks guys. I took this thread along when I visited my optometrist yesterday.
Good news - I have zero astigmatism in my right eye, which is my observing eye for a single eyepiece. My left eye has 0.5 astigmatism.
I'll continue to observe without glasses, but still need them to observe the sky and point the scope. I use them for straight-through finderscope since I want to watch sky and finderscope view simultaneously. But I'll experiment again. My left eye isn't too bad for distance.
I also asked her to measure my dilated pupil diameter. 4mm she reckons! That's probably reasonable for my advanced years and worth knowing!
ps. I've also decided - stuff these multifocals - been driving me crazy for a few years now. I'm getting to pairs of single lenses, one for close and one for long.
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