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I have bad astigmatism, and it shows up worst at low power at 3 to 6 mm exit pupils. But at 0.5mm to 2mm exit pupils, it's not really noticeable.
One usually has longer eye relief at low power (unless it's an ultra-wide angle eyepiece), and one can wear glasses to get rid of the astigmatism. Or when you get a new set of lenses from a new scrip, get the optometerist to cut/grind your old lenses into circles, cutting a little mark at the top of the lenses to show where up is. Then you can attach the lens to an eyepiece with Blutack.
With really big exit pupils like at 8 or 9mm (i.e. very low power), I don't need glasses - instead I just tilt my eye and get rid of the astigmatism, without part of the image blanking out, as woudl be the case with smaller exit pupils.
Regards,
Renato
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