Hi Andy
Ideal is to be between 4-7 before eating, rising only to 10 at absolute max at 1 hour point and then back down again. within the 2 hours This however might be figures for type 1 and Im sure some of our brillian and knowledgeable type 2's will be along soon. Also, its is gold standard but as a newly diagnosed person try not to stress about it because once your meds kick in you should start to see some changes. Even though I am insulin, I still had readings that were too high 2 weeks after diagnosis
However, in saying that an average of 12 is not great, and you should probably think about trying to get it down. Things like bread, pasta, cereals, cakes, pastry etc can all have bad effects on us poor diabetics though people can tolerate different things.
What kind of things do you eat, as this has lots of impact on your sugars?
What advice have you had from the Docs, do you even see a Doc for your diabetes?
Let us know and we can give you more specific advice. Also, the blurred vision is very common when your sugars are coming back down closer to 'normal' levels. You might find that you were running higher sugars for a while and now they are dropping this is causing blurred vision
It usually clears up in a few weeks . Mines went away in 3 weeks, other take a couple of months.Most people are recommended not to get an eye test until at least 3 months after diagnosis because of this and its blurred vision that actually leads to the diagnosis, so it shouldnt be permanent.
L