More than 60% of people who have had Type 2 diabetes for at least 20 years - along with nearly all who have had Type 1 diabetes for the same amount of time - will develop diabetic retinopathy, according to the American Diabetes Association.
More than five million people in the U.S. have diabetic retinopathy, according to the Centers for Disease Control and Prevention, a number that is expected to grow to 16 million by 2050.
If left untreated, diabetic retinopathy can lead to loss of eyesight. It is the leading cause of blindness among working-age Americans.
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