Diabetes and Your Eyes: Why Annual Exams Matter
October 15, 2026
Quick Answer:
People with diabetes should have a dilated eye exam at least once a year. High blood sugar can damage the tiny blood vessels in the retina, a condition called diabetic retinopathy, often without early symptoms. Early detection through an annual exam allows treatment before vision loss occurs.
Diabetic retinopathy is one of the leading causes of vision loss among working-age adults. It often develops slowly and painlessly, so vision may seem fine until damage is advanced.
How diabetes affects the eyes
Over time, high blood sugar weakens the walls of small retinal blood vessels. They may leak fluid, close off, or grow abnormal new vessels. These changes can cause blurred vision, floaters, dark spots, or permanent damage to central vision.
Diabetes also raises the risk of cataracts and glaucoma at younger ages than in people without diabetes.
What happens during a diabetic eye exam
A dilated exam uses drops to widen the pupils so the doctor can see the retina, optic nerve, and blood vessels clearly. The exam typically includes:
- Visual acuity and refraction testing
- Eye pressure measurement
- A dilated view of the retina and macula
- Imaging when needed to track changes over time
Dilation may blur your vision for a few hours, so arrange a ride home if you’re not comfortable driving afterward.
How often should you be screened?
The American Diabetes Association recommends a comprehensive dilated eye exam at diagnosis for type 2 diabetes, and within five years of diagnosis for type 1 diabetes. After that, most people need an exam every year. Your eye doctor may recommend more frequent visits if retinopathy is present or your blood sugar control has been unstable.
What you can do between visits
- Keep blood sugar, blood pressure, and cholesterol within your provider’s target ranges.
- Take prescribed medications consistently.
- Don’t skip appointments, even when your vision feels normal.
- Report sudden vision changes right away.
Frequently Asked Questions
Can diabetic eye damage be reversed?
Early damage can often be managed, and treatment can prevent progression. Advanced damage may not be fully reversible, which is why early detection matters.
Do I need an exam if my vision is perfect?
Yes. Diabetic retinopathy often has no early symptoms, and vision loss may occur only after significant damage.
Is an exam with my primary care doctor enough?
Primary care exams don’t include a dilated retinal exam. A dedicated eye exam is needed to screen for diabetic eye disease.
Need your diabetic eye exam?
Schedule with us by calling (978) 774-7033 . Learn more about our Diabetic Eye Exams .
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