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Source: National Eye Institute, U.S. National Institutes  of Health

1. What is diabetic eye disease?
Diabetic eye disease refers to a group of eye problems that people with diabetes may face as a complication of this disease. All can cause severe vision loss or even blindness.

Diabetic eye disease may include:

Diabetic retinopathy – damage to the blood vessels in the retina.

Cataract – clouding of the eye’s lens.

Glaucoma – increase in fluid pressure inside the eye that leads to optic nerve damage and loss of vision.

2. What is the most common diabetic eye disease?
Diabetic retinopathy. This disease is a leading cause of blindness in American adults. It is caused by changes in the blood vessels of the retina. In some people with diabetic retinopathy, retinal blood vessels may swell and leak fluid. In other people, abnormal new blood vessels grow on the surface of the retina. These changes may result in vision loss or blindness.

3. What are its symptoms?
Often there are none in the early stages of the disease. Vision may not change until the disease becomes severe. Nor is there any pain. Blurred vision may occur when the macula – the part of the retina that provides sharp, central vision – swells from the leaking fluid. This condition is called macular edema. If new vessels have grown on the surface of the retina, they can bleed into the eye, blocking vision. But, even in more advanced cases, the disease may progress a long way without symptoms. That is why regular eye examinations for people with diabetes are so important.

4. Who is most likely to get diabetic retinopathy?
Anyone with diabetes. The longer someone has diabetes, the more likely he or she will get diabetic retinopathy. Between 40-45 percent of those with diagnosed diabetes have some degree of diabetic retinopathy.

5. How is it detected?
If you have diabetes, you should have your eyes examined at least once a year. Your eyes should be dilated during the exam. That means eyedrops are used to enlarge your pupils. This allows the eye care professional to see more of the inside of your eyes to check for signs of the disease.

6. How common are the other diabetic eye diseases?
If you have diabetes, you are also at risk for other diabetic eye diseases. Cataracts develop at an earlier age in people with diabetes. Cataracts can usually be treated by surgery.

Glaucoma may also become a problem. A person with diabetes is nearly twice as likely to get glaucoma as other adults. And, as with diabetic retinopathy, the longer you have had diabetes, the greater your risk of getting glaucoma. Glaucoma may be treated with medications, laser, or other forms of surgery.