Since I started on the LCHF diet and metformin 3 weeks ago there has been a radical change in my eyesight. At first I was worried because my vision, even wearing my glasses (TV, driving) was gettting very blurred. Then I took the glasses off and discovered that I could see perfectly well without them. I haven't been able to read a subtitle on the TV for about 8 years without glasses but now I can read them clearly without my glasses. However, I've discovered that I need to wear my cheapo supermarket reading glasses, which I used to only need for doing small cross-stitch, to read anything. I can just about manage the computer screen without them because it's more than arm's length away but trying to read my Kindle is nigh on impossible, even with big print. The print size seems irrelevant, whether it's large or small I still need the reading glasses. Has anyone else experienced this and is it permanent or temporary?