I was told I have astigmatism by multiple optometrist, but I'm convinced they aren't right. I have clear double image (not blurring) in one eye shifted by ~1% or so down and to the left, no prescription has ever corrected it in the slightest (some have made it worse). These days I just live with it and don't wear glasses. I've contemplated getting eye surgery if I was confident that the issue would be corrected.