The original request was for the range of normal blood glucose levels in children before each meal and at bedtime by quartiles, and for obvious reasons, these are not readily available. Finally, eat healthy. A good diet can help you maintain a normal blood sugar. 3. Blurred vision. An elevated blood sugar causes diabetic retinopathy. Dr. Seale Harris first recognized hypoglycemia in diabetics in 1923. Two important causes are behind the fact. This causes problems to your kidneys since it’s the organ responsible for filtering excess materials (including water) from your body. Third, (...)