Anthony!!
I have just joined this forum to post exactly the same question as you!
I was diagnosed with type 2 on the 29th dec - and started 2x 500mg metformin. My test showed I was 23 (supposed to be 7?!) I'm 31 years old. The day I was diagnosed I started a strict diet.
4 days ago my vision changed overnight! I had perfect vision and could see close and far. I only had to wear a 0.1 prescription on my computer.
What's happened is almost hard to explain - but Anthony was close. My vision isn't blurry - it's like my eyes can't focus. If I try hard - I can force my eyes to focus, but they then slip back out of focus.
When you instinctively get your phone out your pocket (or pick up a book, etc) and move it to the distance from your face that you just "know" is the right distance - it's out of focus. I'm at arms length to read.
I went to the doctors - but he didn't say it had anything to do with my diabetes - he told me to just go to the opticians. But I don't believe this. Not when it happened overnight - and just a week after starting metformin.
I'm not sure I should go to the opticians as I know my prescription will have changed now - as I can't see right. But I don't want to buy new glasses as it feels different most mornings.
It's scary. As what's more important then your eyesight. I'm worried it's something more serious.
Everyone's replies that it's just blood levels is good. I just hope that's the case. Great forum everyone