It's as we discussed on the Diabetic thread, the blood vessels at the back of the eye become viscose through sugar levels not being properly controlled, you will always get some changes but if left can cause blindness, cataracts & impaired vision , which is why you were advised by another poster to have an eye test once your levels were under control, even more important most Diabetics have an annual eye X-ray so that if there is a drastic change the Hospital can do something about it!.
**********Sam**********