When people have diabetes, it means that their bodies do not make enough insulin or insulin can’t be absorbed properly. This is known as high blood sugar, or hyperglycemia. People with diabetes can also experience low blood sugar, which is called hypoglycemia.1
Along with blood sugar levels, diabetes can affect many organs and blood vessels in the body if it is not controlled. This includes the eyes. A common warning sign for diabetes is blurry vision. Other eye issues that diabetes can cause include swelling, weakened blood vessels, and damage to the retina.