This may sound a touch bizarre, but hear me out.
I have an astigmatism which I have always overcome with the help of glasses. This last week, I switched to contacts.
I'm aware that those who have a certain degree of astigmatism will have trouble with contact lenses - in particular that the shape of the eye causes an ill-fit for the lense, creating stereotypically blurry vision.
I've noticed that when lifting with contact lenses in, my eye-sight will be more blurry than usual, returning to normal about an hour or so after exercise.
It's not just weight training, even dynamic stretching will cause this very slight blur...
So really, my question is, does exercise temporarily alter the shape of the eye, worsening potential astigmatisms?