Which condition is a common diabetic eye disease and leading cause of blindness in the United States?

• A. Glaucoma
• B. Conjunctivitis
• C. Stye
• D. Diabetic retinopathy

Answer: (D)

Diabetic retinopathy happens when long-term high blood sugar damages the tiny blood vessels in the retina, the light-sensitive tissue at the back of the eye. That damage can cause vessels to leak, swell, or close off, and new abnormal vessels may grow. These changes blur or distort vision and, if untreated, can lead to significant vision loss or blindness. It’s tied directly to diabetes and is the most common diabetic eye complication, making it the leading cause of blindness among adults with diabetes in the United States. Regular dilated eye exams are crucial so changes can be caught early, before vision is affected. Management focuses on tight blood sugar control, blood pressure and lipid management, and targeted eye treatments such as laser therapy or injections that curb abnormal vessel growth. Other eye conditions listed—glaucoma, conjunctivitis, and stye—are not tied to diabetes as the primary diabetes-related cause of blindness.