One cause of vertigo is when your inner ears tell you something your eyes dispute, or in this case one of your eyes. The distortion mentioned above could certainly explain it, as could a slight magnification present in the Aimpoint, which of course shouldn’t be there.
I saw that someone else asked you if it happens even if you switch eyes, but I didn’t catch it if you responded.
It could just be astigmatism and how your mind processes it. I would mention it at your next Dr visit, either primary care or optometrist.


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