My glasses are really thick to make up for my astigmatism, and it makes the world look a bit convex. Eventually, my brain got used to that, but when I switch to contacts I have a good day or two where everything looks concave (first time I thought my phone screen had finally been sat on one too many times) until my brain reverts back. IDK if i’ve ever noticed circles looking like eggs, but then again I rarely am looking at circles with my naked eyes and maybe my brain is fixing it for me anyway?