I know what you mean...I was told that if I don't quit smoking I would lose my right foot. An ER Dr. told me that. I talked to my regular Dr. and he said that in severe cases that can happen.
I understand the blurred vision.
To get my blood sugars low is that I am eating less and that I drink a bottle that had pop in it and it is 1.5 Liters and I put flavor packets in it and then drink..JUST make sure the packets are caffeine free and sugar free.