From the Microsoft Network:
My son was diagnosed with IDDM one week ago. He came home from the hospital a few weeks ago. In the last two days, his vision has become blurry to the point where he can hardly read. His blood sugar levels are running a little high right now (100 - 200 mg/dl) and his dosages are still being adjusted by the doctors. Can the insulin or the diabetes be the cause of his blurred vision?
You should not be too concerned about the blurred vision; it will gradually clear in the next few days. I imagine that your son had quite high blood sugars before he was diagnosed. These high sugar concentrations will have penetrated into the posterior chamber of the eye. After diagnosis blood sugars will have been brought down quite rapidly; but because the wall of the globe of the eye is less permeable to glucose than other membranes, the level of sugar inside the posterior chamber stays high after the blood sugar has fallen. What then happens is that water is attracted into the eye by osmotic pressure; the globe swells and the distance between lens and retina is distorted. Hence the blurred vision. In a few days the eye will adjust to the new blood sugar levels and normal vision will be restored. This is not likely to be an important symptom in the future if your son can maintain reasonably good control. It is essentially a mechanical problem and does not presage retinal problems in the future nor does it indicate a need for glasses.
Original posting 19 Feb 97
Last Updated: Tuesday April 06, 2010 15:08:52
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