Normal pre-meal glucose and high post-meal glucose means that the diabetic patient has an absolute deficiency of insulin secretion or has insulin resistance. In this group of patients, it is possible that too much food was overeaten and too much energy was produced in the body and converted into glucose. Because of insulin resistance, it cannot be converted into this substance that can be used by the cells. In such a case, it is recommended that the patient reduce food intake and improve the function of insulin resistance to improve the increase in blood sugar. Excessive blood sugar builds up in the blood vessels, which also means that large, medium and small blood vessels are about to be damaged, and in time there may be combined peripheral neuropathy of the eye, as well as nephropathy and cardiovascular disease.