Can you get diabeties from blurry vision?

Other way around. Diabetes is a cause of visual blur usually from wild swings in the sugar level or structural damage to the retina. So blur of vision may be the first clue that you have diabetes but will not cause the diabetes, which is from a problem with the pancreas.
Exam needed. If you have diabetes and blurred vision, you need an eye exam promptly! diabetes can cause serious, irreversible damage. But preventable if caught early!