That is one more good reason for diabetic patients to have an annual eye exam. One interesting change in how we think about diabetes is that many diabetics have problems because they actually have too much insulin, but their insulin doesn't work well for them because they have naturally antibodies against their own insulin. Since most diabetic pills just increase the amount of insulin, you can see that isn't the answer for many patients. One new diabetic medicine makes the insulin that is already in your blood stream work better in muscles, and so it lowers the blood sugar level without adding more insulin. But the real outcomes of how well a patient does is up to the patient, not the doctor.
Patients are the ones that have to follow diets, keep their weight down and take their medications.
This is a lot of work. But if it really helps it is really worth it. Check with your doctor and see if you are doing all you can to help yourself.