I went to the optician a year ago, after 1 year of PFS and worsening eyesight, and was prescribed glasses which have largely corrected me eyesight (I have astigmatism in both eyes). Of course, a PFS-denying endo refused to accept my eyesight was PFS related.
Anyway. Long story short, go and have an eye test. My glasses don’t make my eyesight better all the time as it seems to fluctuate, some days I don’t need them, some days they don’t do sufficient to correct it. But most days they correct it.
The fact my eyesight fluctuates so much tells me it is related to PFS, but at least glasses have brought some respite.