Welcome to the Forum!
Prolonged high blood sugar will have a negative effect on your vision. When you get your blood sugar to a more normal level and stabilized, you should see a great improvement in your vision.
Read through the first three threads in the Type 2 Section, when you get a chance, if you have not already done so. These threads will most-likely help you a lot. Self education is one of the keys to successful management of your diabetes, along with a healthy / sensible diet and exercise. Basically, diabetes requires a life-style change for the better.
Also take a look at
Type 1.5 diabetes. Good luck with your control and management.