What Kelly said!
I definitely get blurry vision if my sugars are high for a few days, it will also usually take a few days for them to clear up once my sugars get back where they're supposed to be.
I have retinopathy, but it has been improving over the last couple of ophthalmologist visits as my control has improved.
BTW, you REALLY need to see an ophthalmologist and have a dilated eye exam to find out if there is anything to worry about. With out dilating the eye, only about 5% of the retina is visible. An optometrist (the one who does glasses and contacts only) will not really will not do that, nor likely have the proper instruments to give a proper examination.