But blurry vision may also be from foods. I get very blurred from MSG which is often hidden in restaurant foods. (esp far vision--it doesn't affect my close work).

The cornea can swell up up from too much salt as well.
Did you have it equally in BOTH eyes, or only one?

I had a stroke in my left eye's retina years ago. There was no blurry vision, but I did have a ache in that eye and a vague headache on the left for at least a week. I didn't even know it...until I tried to walk to the bathroom in the night, and then I had a huge hole in my left central vision.

I have had two angiograms of that same eye over the years. The first one showed an ocular migraine, the second showed a hemorrage into the retina, and the doctor could see the culprit...right branch vein.
I have had no other issues with that eye. And I now watch my blood pressure more closely. (the stroke followed a very upsetting day, a major thing which the doctor said could have elevated my pressure high, and it remained that way for hours...not good for the eyes!). But given that I am old, I show no significant ischemic damage over the long run...which surprised me and the doc too.