This was one of the first signs that my BG was out of control. For a while, until you can get your diabetes under control, you can go from needing a prescription to not needing a prescription in like minutes - seriously. I went from seeing 20/20 to needing trifocals to needing reading glasses to needing a small amount of correction. Your body is trying to tell you something. Even if your a1c is around 6 or 7, this symptom can still be marked of diabetes.
