Annual eye exams are especially important for anyone with diabetes or who might be at risk for the disease. High or fluctuations in blood sugar levels can damage the sensitive blood vessels in the retina, causing them to swell, break and leak fluid into the eye. This condition is called diabetic retinopathy, and it is the leading cause of blindness in adults. In its early stages, diabetic eye disease has no visible symptoms. Only a comprehensive eye exam can detect signs of the disease so treatment can begin soon enough to prevent vision loss.
High blood sugar can also cause temporary effects such as blurry vision. Diabetes also increases your risk for other eye diseases including cataracts and glaucoma.