Hi Amy,
Try not to worry, I think this happens to alot of people. My eyes were a bit blurry immediately before diagnosis, then when I was diagnosed and started using insulin and getting my blood sugar back to reasonable levels, I found I could hardly see a thing! I too could see better without my glasses on, and like you could hardly see to type or text. I convinced myself I was going blind but it does gradually get back to normal - mine took a few weeks and I couldnt drive during this time. I was advised to hold off getting a new prescription until it settled down.
Jessie.