Diabetic retinopathy is a leading cause of blindness in the United States,
occurring in about 25?50% of people with diabetes.

People with Type 1 diabetes are especially at risk for retinopathy. When
Type 1 diabetes coexists with hypertension, a person may be four times
as likely to develop proliferative retinopathy, the most damaging form
of diabetic retinopathy. It occurs in about 60% of people with Type I
diabetes and in about 5% of people with Type II diabetes within about
two decades after diabetes is diagnosed.


Diabetic Retinopathy
When diagnosed early in the course of the disease, diabetic retinopathy can be effectively managed.
Annual eye examinations are essential in diabetic care to prevent permanently impaired or lost vision.

Vision defects accompanying Type I diabetes are somewhat common, and can lead to blindness
without prompt and ongoing intervention. Diabetic retinopathy that can cause vision loss occurs with
damage to the retina where light-sensitive cells are located and images are processed.

Signs and Symptoms

In its earliest stages, diabetic retinopathy usually does not produce symptoms. Once macular edema
develops, vision blurs and the quality of vision may fluctuate.

Bleeding can also cause vision loss, as the disease advances. As bleeding and leakage increase, vision
decreases. In severe cases, vision is so impaired that the patient is only able to distinguish light from
dark in the affected eye.

Treatment

Diabetic retinopathy can be treated with laser photocoagulation to seal off leaking blood vessels and
destroy new growth. Another procedure called a vitrectomy removes blood that has leaked into the
vitreous humor. Lost vitreous humor is gradually replaced by the body, and vision improves.