With a healthy, normal eye, the shape of the cornea is spherical, like a basketball. This allows light to pass through the lens without distortion. Light rays focus properly on your retina to provide a sharp image of what you are seeing.
Diabetes causes an abnormal increase in blood sugar levels. This abnormal sugar level can cause all kinds of damage to the body including the eyes. There is a variety of eye conditions that fall under the category of “diabetic eye disease.”