Blindness and complications are not inevitable with diabetes that is very well managed and with blood sugars kept in normal range, which is < 140 all the time.
This takes a lot of hard work and discipline, but it sure will beat the complications.
Uncontrolled and unmanaged diabetes increases your risk for many serious health complications that affect your eyes, kidney's, heart, nerves, foot, skin, oral, fatty liver, and the list goes on. The good news? With the correct treatment and proper/necessary lifestyle changes, many people with diabetes are able to prevent or delay the onset of these complications. Inevitable? A lot of people when first hearing they have diabetes get angry because the truth hurts. It will hurt even more if they deny it and remain in denial.