Retina Services

---

What is Diabetic Retinopathy?

Diabetic retinopathy (DR) is eye damage that develops when elevated blood sugar from diabetes harms the blood vessels of the retina. Weakened vessels can swell and leak fluid into the retina, close off and cut down blood flow, or trigger the growth of abnormal new vessels that bleed or form scar tissue. Any of these changes can lead to vision loss, which is why the retina specialists at Florida Retina Institute monitor patients with diabetes so closely.

What Are the Stages of Diabetic Retinopathy?

Diabetic retinopathy progresses through two main stages: an earlier stage called non-proliferative diabetic retinopathy (NPDR) and an advanced stage called proliferative diabetic retinopathy (PDR).

Early stage: Non-Proliferative Diabetic Retinopathy (NPDR). In NPDR, your retina specialist can already see changes in the retina, even though many people at this stage notice no difference in their vision. Vision loss can still occur at any point if the central retina begins to swell. This swelling is known as macular edema, and it is the single most common reason people with diabetes develop blurry vision or lose sight.

---

These scans show macular edema captured by OCT (Optical Coherence Tomography). Also called Diabetic Macular Edema or DME, this swelling is the leading cause of vision loss in diabetes.

In severe NPDR, retinal blood vessels can also close entirely and starve the retina of blood flow. This problem is called macular ischemia, and it produces blurred vision. How much your vision is affected at this stage depends on the severity of the disease.

---

Advanced stage: Proliferative Diabetic Retinopathy (PDR). PDR is the most serious form of diabetic eye disease. When the retina is deprived of adequate blood flow, it responds by growing new blood vessels through a process called neovascularization.

These fragile vessels develop in the wrong places, frequently bleed into the eye, and can produce floaters or block vision entirely. As they grow, they may also create scar tissue that pulls on the retina, potentially causing a retinal detachment. Left untreated, PDR can cause permanent, irreversible vision loss.

What Are the Symptoms of Diabetic Retinopathy?

Diabetic retinopathy often causes no symptoms at all in its early stages, which is why regular dilated eye exams are essential for everyone with diabetes. As the disease advances, you may notice:

• New or increasing floaters, which appear as small dark spots, specks, or cobweb shapes drifting through your vision and may be caused by bleeding from damaged retinal vessels.

• Flashes of light in your vision, which can signal that scar tissue or the vitreous gel is pulling on the retina.

• Blurry vision.

• Vision that fluctuates, clear at times and blurry at others.

• Dark or blank spots in your field of vision.

• Reduced night vision.

• Colors or images that appear washed out or less sharp.

The condition usually affects both eyes, though one eye may be more severely involved than the other. Swings in your blood sugar levels can also cause temporary changes in your vision.

A sudden shower of new floaters or flashes of light should never be ignored. These symptoms can indicate bleeding inside the eye or a developing retinal tear or detachment, and they warrant a prompt call to your retina specialist.

How is Diabetic Retinopathy Diagnosed?

Diabetic retinopathy is diagnosed through a dilated eye exam, during which your retina specialist widens your pupils with drops and examines the back of your eye using special lenses and bright lights.

Depending on what your doctor sees, additional imaging may be recommended:

Fluorescein angiography (FA) maps the blood flow in your retina. A yellow dye called fluorescein is injected into a vein, usually in your arm or hand, and a specialized camera photographs the dye as it moves through the vessels of your eye. The images reveal blocked vessels, leaking fluid, and any abnormal new vessel growth.

Optical coherence tomography (OCT) provides a noninvasive, virtual biopsy of the retina. This microscopic level cross section allows your doctor to detect even subtle swelling within the retinal layers.

How is Diabetic Retinopathy Treated?

Treatment for diabetic retinopathy is tailored to the stage and severity of each person's disease. Options may include:

Medical control. Managing your blood sugar and blood pressure can slow or stop the progression of vision loss, and in some cases improved blood sugar control can restore a portion of the vision you have lost. A balanced diet guided by your nutritionist supports blood sugar control, and it is important to take the medications prescribed by the doctor managing your diabetes.

Medication injections. The primary eye medication is anti-VEGF therapy, which reduces vessel leakage and bleeding while decreasing swelling in the macula. This often slows vision loss and, in many patients, improves vision. Steroid medications are another option for reducing macular edema. Both are delivered as injections into the white part of the eye, typically repeated over time, and every patient's disease responds differently.

Laser procedures. Focal laser treatment can seal off vessels leaking fluid into the macula. A broader treatment called panretinal photocoagulation shrinks abnormal blood vessels and discourages them from returning. Some patients need more than one session.

Vitrectomy surgery. For advanced PDR involving bleeding, scar tissue, or retinal detachment, your retina specialist may recommend vitrectomy, an operating room procedure that removes the vitreous gel and any blood from inside the eye. Scar tissue may also be removed to repair a detached retina.

How Can I Prevent Vision Loss From Diabetic Retinopathy?

The most effective ways to prevent vision loss from diabetic retinopathy are controlling your blood sugar and blood pressure and keeping up with regular dilated eye exams. Persistently high blood sugar damages retinal blood vessels, and high blood pressure, high cholesterol, and kidney problems can all add to that damage. Work closely with your primary care doctor to manage each of these conditions.

Because diabetic retinopathy can be present without any noticeable vision problems, do not wait for symptoms. See your retina specialist regularly for dilated exams; more advanced disease requires more frequent visits. And if you notice vision changes in one or both eyes, call your retina specialist right away. Early detection and treatment remain the best defense against vision loss.

How Are Diabetes, Blood Sugar, and Blood Pressure Connected to Eye Health?

Diabetes affects your eyes because the retina depends on a dense network of tiny, delicate blood vessels, and those small vessels are exactly what chronically high blood sugar damages most. Over time, excess glucose in the bloodstream weakens capillary walls throughout the body. In the retina, that damage shows up as vessels that leak fluid, bleed, or close off entirely. This is why diabetic retinopathy is a complication of being diabetic rather than a separate eye disease: the longer blood sugar runs high, and the higher it runs, the more retinal damage accumulates.

High blood pressure compounds the problem. Vessels already weakened by diabetes are under constant extra force when blood pressure is elevated, making leakage and bleeding more likely. High cholesterol and kidney disease add further strain on the same small vessels, which is why the retina often reflects what is happening in the rest of a diabetic patient's circulatory system. Protecting your vision and managing your diabetes are, in a real sense, the same project.

What Lifestyle Changes Help Protect My Vision With Diabetes?

The most protective lifestyle changes for your eyes are the ones that keep your blood sugar and blood pressure in your target range day after day. Working with your primary care doctor and nutritionist, that generally means:

• Eat a balanced diet that supports healthy blood sugar. Build meals around vegetables, whole grains, lean proteins, and healthy fats, and limit sugary drinks, sweets, and refined carbohydrates that spike glucose. A nutritionist can tailor a plan to your needs and medications.

• Stay physically active. Regular activity helps your body use insulin more effectively and supports healthy blood pressure. Ask your doctor what level of exercise is right for you.

• Take your medications as prescribed. Skipping diabetes, blood pressure, or cholesterol medications allows the vessel damage that drives retinopathy to continue silently.

• Monitor your numbers. Know your A1C, blood pressure, and cholesterol targets, and track them with your care team.

• Do not smoke. Smoking further damages blood vessels and raises the risk of diabetic eye disease progressing.

• Keep every dilated eye exam. Lifestyle control lowers your risk but does not eliminate it. Regular exams with your retina specialist remain essential, because early retinopathy is treatable and often symptom free.

Frequently Asked Questions About Diabetic Retinopathy

How often should people with diabetes have an eye exam?

Most people with diabetes should have a dilated eye exam at least once a year, even when their vision seems fine, because early diabetic retinopathy usually has no symptoms. If retinopathy is already present, your retina specialist may recommend more frequent visits based on the severity of your disease. Your doctor will set the schedule that is right for your eyes.

Do the eye injections hurt?

Most patients are surprised by how comfortable the injections are. Your eye is numbed thoroughly with anesthetic drops or gel beforehand, so you typically feel pressure rather than pain, and the injection itself takes only seconds. Some people notice mild irritation or a scratchy feeling for a day afterward, which usually resolves on its own.

Can diabetic retinopathy be reversed?

Some of the damage can improve with treatment. Better blood sugar control can restore a portion of lost vision in some patients, and anti-VEGF injections often reduce swelling enough to improve sight, not just stabilize it. However, advanced damage such as scar tissue or long standing vessel loss is generally permanent, which is why catching the disease early matters so much.

Can diabetic Rretinopathy cause blindness?

Yes. Without treatment, diabetic retinopathy can progress to blindness. In its earliest stages the disease may cause few or no symptoms, but as it advances, the damage to the eye becomes more serious. The encouraging news is that early detection paired with today's treatments, including medication, eye injections, laser procedures, and surgery, can protect your sight. Regular visits to your retina specialist to check for diabetic eye damage are the key.

If you have diabetes and are due for a retinal exam, or your eye doctor has referred you for diabetic retinopathy care, please contact Florida Retina Institute or call our office to speak with a member of our team. With 21 locations throughout Florida and Georgia, expert diabetic eye care is always close to home.