Diabetic Retinopathy: The Stages, the Symptoms, and How Often You Need an Eye Exam

Quick answer: Diabetic retinopathy is damage to the retina's blood vessels caused by high blood sugar over time. It progresses from mild, moderate, and severe nonproliferative stages, where vessels weaken and leak, to proliferative diabetic retinopathy, where fragile new vessels grow and can bleed or cause retinal detachment. Early stages usually have no symptoms. The American Diabetes Association recommends a dilated eye exam at diagnosis for type 2 diabetes, within five years of diagnosis for type 1, and then yearly, or as directed by your eye doctor.

Why is diabetic retinopathy so common?

High blood sugar damages small blood vessels throughout the body, and the retina has some of the smallest. Over years, those vessels weaken, bulge, leak, or close off. According to the National Eye Institute, diabetic retinopathy is the most common cause of vision loss in people with diabetes.

South Florida has a large population living with diabetes, which makes regular diabetic eye exams especially important here.

What are the stages?

Diabetic macular edema (DME) can happen at any stage. Fluid leaks into the macula and blurs central vision. It's the most common cause of vision loss from diabetes. Read Diabetic Macular Edema Treatment.

What symptoms should I watch for?

Early retinopathy is usually silent, which is why exams matter. Later symptoms include:

• Blurry or fluctuating vision
• New floaters or dark strings
• Dark or empty areas in your vision
• Difficulty with colors
• Sudden vision loss

Any sudden change deserves a same-day call.

How often do I need a diabetic eye exam?

• Type 2 diabetes: at diagnosis, then yearly.
• Type 1 diabetes: within five years of diagnosis, then yearly.
• Pregnancy with pre-existing diabetes: before or early in pregnancy, with closer follow-up.
• If retinopathy is present: more often, as your retina specialist recommends.

Some people with well-controlled diabetes and no retinopathy may be told every one to two years is enough. Your eye doctor will set the right interval.

How is diabetic retinopathy treated?

• Blood sugar, blood pressure, and cholesterol control slow progression at every stage.
• Anti-VEGF injections treat diabetic macular edema and can also improve proliferative disease.
• Laser treatment (panretinal photocoagulation) shrinks abnormal vessels in proliferative disease, and focal laser can treat some leaks.
• Steroid injections or implants help some cases of DME.
• Vitrectomy surgery clears bleeding inside the eye or relieves scar tissue pulling on the retina. See Vitrectomy Recovery.

Can vision loss from diabetes be prevented?

Much of it, yes. The combination of regular exams, early treatment, and good diabetes control prevents most severe vision loss. Treatment works best before symptoms appear.