Diabetic Retinopathy: A Patient’s Guide to Protecting Your Vision
Understanding Diabetic Retinopathy
Diabetic retinopathy is a serious eye condition that develops as a complication of diabetes. Understanding how and why it forms helps explain why regular monitoring matters so much.
Diabetic retinopathy is damage to the blood vessels in the retina, which is the light-sensitive tissue lining the back of the eye. High blood sugar weakens and changes these tiny vessels over time. They may leak fluid, swell, or close off entirely, causing harm to the delicate tissue that makes vision possible.
Chronic high blood sugar injures the walls of retinal blood vessels and triggers inflammation. This process causes the eye to release a protein called vascular endothelial growth factor, or VEGF. VEGF signals the eye to grow new but fragile blood vessels that break easily and leak blood or fluid. Over time, scar tissue can also form, pulling on the retina and raising the risk of retinal detachment.
Diabetic retinopathy progresses through two primary stages. Nonproliferative diabetic retinopathy, often called NPDR, is the earlier stage. It involves tiny bulges in blood vessel walls called microaneurysms, small areas of bleeding in the retina, and vessel swelling. No abnormal new blood vessel growth has occurred yet.
Proliferative diabetic retinopathy, or PDR, is the more advanced stage. It occurs when the retina becomes so starved of oxygen that the eye begins growing new, abnormal blood vessels. These fragile vessels can bleed into the vitreous, which is the gel filling the inside of the eye, and can lead to serious complications including retinal detachment.
Diabetic macular edema, known as DME, is swelling in the macula, which is the central part of the retina responsible for sharp, detailed vision. DME can develop at any stage of diabetic retinopathy. When fluid leaks into the macula, it causes blurred or distorted central vision. When the swelling affects the very center of the macula, it poses the greatest threat to reading vision and the ability to perform everyday tasks.
Who Is at Risk
Diabetic retinopathy affects a large number of people living with diabetes. Knowing the risk factors helps identify who may need earlier or more frequent screening.
Diabetic retinopathy affects millions of Americans with diabetes, and a meaningful portion of those cases are vision-threatening. The number of people affected continues to grow alongside rising rates of diabetes. Even more notable, studies have found that nearly one in four people newly diagnosed with diabetes may already show signs of retinopathy at the time of diagnosis.
Several factors increase the likelihood of developing diabetic retinopathy or experiencing faster progression. People who have had diabetes for 15 years or more face a significantly higher risk of both developing retinopathy and having a more severe form of the disease.
- Long duration of diabetes
- Chronic high blood sugar, also called poor glycemic control
- High blood pressure, also called hypertension
- High cholesterol and other lipid abnormalities, called dyslipidemia
- Kidney disease, also called nephropathy
Managing these factors through regular medical care is one of the most important steps a person with diabetes can take to protect their vision.
Certain groups require extra attention. Pregnant women with pre-existing diabetes face an increased risk of rapid progression of diabetic retinopathy. These patients should have a dilated eye exam early in pregnancy and be monitored closely throughout. Women who develop gestational diabetes, which is diabetes that begins during pregnancy, do not require a separate eye exam for this reason alone.
Adolescents going through puberty may also experience faster progression of the disease, making closer follow-up during this developmental stage especially important.
There is growing awareness that rapidly lowering blood sugar, particularly with newer glucose-lowering medications such as semaglutide, may accelerate the onset or progression of diabetic retinopathy in some patients. This is most likely in people who had previously uncontrolled blood sugar levels. If you are starting one of these medications, a retina specialist may recommend closer retinal monitoring during the early months of treatment.
Signs and Symptoms
Diabetic retinopathy can cause different symptoms depending on how far it has progressed. In many cases, significant changes are occurring inside the eye long before a person notices anything unusual.
In its early stages, diabetic retinopathy may cause no noticeable symptoms whatsoever. Many patients feel their vision is perfectly normal even when measurable damage is happening to the retina. This is one of the most important reasons why routine screening is critical. Damage can build up silently before any change in sight occurs.
As the disease progresses, patients may begin to notice changes in their vision. These can include blurred or fluctuating vision, dark spots or floaters, difficulty seeing in low light, and colors that appear faded or washed out. If diabetic macular edema develops, straight lines may appear wavy and reading may become increasingly difficult.
Certain symptoms indicate a potentially serious problem and require immediate evaluation. These include a sudden increase in floaters, flashes of light, a shadow or curtain across part of the vision, or sudden vision loss in one eye.
These symptoms could signal a vitreous hemorrhage, which is bleeding inside the eye, or a retinal detachment. Both conditions require prompt treatment to have the best chance of protecting vision. Do not wait for a scheduled appointment if you experience any of these warning signs.
Diagnosis and Eye Exams
Catching diabetic retinopathy early depends on regular, thorough eye examinations. Several tools are available to evaluate the health of the retina in detail.
People with type 1 diabetes should begin annual screening for diabetic retinopathy five years after their diagnosis. People with type 2 diabetes should have their first eye exam at the time of diagnosis and at least once every year after that. A retina specialist may recommend more frequent exams if any signs of disease are found or if additional risk factors are present.
The standard method for detecting diabetic retinopathy is a comprehensive dilated eye exam. During this exam, special drops are used to widen the pupil so the specialist can see the inside of the eye clearly. The specialist examines the retina for microaneurysms, areas of bleeding, swelling, abnormal blood vessels, and other signs of damage.
When a more detailed evaluation is needed, retina specialists use additional imaging and testing tools.
- Optical coherence tomography, or OCT, creates cross-sectional images of the retina to measure swelling and detect fluid buildup
- Fluorescein angiography uses a special dye injected into a vein to reveal leaking or blocked blood vessels
- Electroretinography, or ERG, measures the electrical response of the retina to light and can provide additional information about retinal function
These tests help guide treatment decisions and track changes over time.
Treatment Options
Diabetic retinopathy and diabetic macular edema can be treated in several ways depending on the stage of disease and the individual patient's needs. A retina specialist will recommend the approach most appropriate for your situation.
Anti-VEGF medications are the primary treatment for center-involved diabetic macular edema with vision loss and for proliferative diabetic retinopathy. These medications block vascular endothelial growth factor, the protein responsible for abnormal blood vessel growth and leakage. They are delivered through intravitreal injections, meaning the medication is injected directly into the eye in a clinical setting.
Several anti-VEGF agents are used in retina care. Eylea (aflibercept) is commonly used and is typically given every four to eight weeks after initial doses. Eylea HD (high-dose aflibercept) offers extended dosing intervals of up to five months for some patients with DME. Lucentis (ranibizumab) was the first anti-VEGF medication approved for eye use and is typically given every four weeks. Vabysmo (faricimab) targets both VEGF and a second protein called angiopoietin-2, and can be given at intervals of up to 16 weeks for some patients.
Avastin (bevacizumab) is FDA-approved to treat certain cancers but is widely used off-label by retina specialists for diabetic macular edema and diabetic retinopathy. It works through the same VEGF-blocking mechanism as the other agents and is typically given every four to six weeks. Patients should be informed that its use for eye conditions is off-label, meaning it is not FDA-approved specifically for this purpose.
Susvimo (ranibizumab injection) 100 mg/mL is the first FDA-approved continuous delivery treatment for diabetic retinopathy. A small refillable implant is surgically placed inside the eye and delivers medication on an ongoing basis, with refills needed approximately every nine months. This option may meaningfully reduce the number of office visits required for treatment over time.
Panretinal photocoagulation, commonly called PRP, is a laser procedure that remains an important treatment for proliferative diabetic retinopathy. During PRP, a retina specialist applies small laser burns to the peripheral retina to reduce its oxygen demand and slow the growth of abnormal blood vessels. Focal or grid laser treatment may also be used in certain cases of diabetic macular edema.
Vitrectomy is a surgery to remove the vitreous gel from inside the eye. It may be needed when significant bleeding has occurred inside the eye or when scar tissue is pulling on the retina. During the procedure, the retina specialist removes the vitreous along with any blood or scar tissue and replaces it with a clear solution or a gas bubble to help the retina heal and remain in place.
What to Expect During and After Treatment
Understanding what treatment involves and what happens over the long term can help reduce anxiety and make it easier to stay consistent with care.
When diabetic retinopathy is detected and treated early, current treatment strategies may be highly effective at preventing severe vision loss. Anti-VEGF injections can reduce the severity of diabetic retinopathy and in some cases cause measurable improvement on imaging. Outcomes depend significantly on how advanced the disease is when treatment begins, which is why early detection matters so much.
Most anti-VEGF treatment visits take less than an hour. Before the injection, the eye is numbed with anesthetic drops to minimize discomfort. Patients may feel mild pressure or a brief sensation during the injection rather than sharp pain. Some soreness, redness, or a gritty sensation may follow and typically resolves within a day or two.
Diabetic retinopathy is a chronic condition that requires long-term management. Even after successful treatment, regular follow-up exams are essential to watch for any recurrence or change in the disease. A retina specialist will determine the appropriate follow-up schedule based on the severity of your condition and how well you respond to treatment.
Living with Diabetic Retinopathy
Managing diabetic retinopathy goes beyond office visits. The choices you make every day have a real impact on how the disease progresses.
Controlling blood sugar levels is one of the most powerful steps a person can take to slow the progression of diabetic retinopathy. Working closely with a primary care provider or endocrinologist to keep blood sugar, blood pressure, and cholesterol within healthy ranges directly supports the health of the small blood vessels in the retina. These efforts work alongside the treatments your retina specialist provides.
Because diabetic retinopathy can worsen without causing noticeable symptoms, skipping or delaying appointments can allow the disease to reach a stage where treatment is less effective. If you notice any new changes in your vision between scheduled visits, contact a retina specialist right away rather than waiting for your next appointment.
A diagnosis of diabetic retinopathy can bring real worry and frustration. Connecting with a diabetes support group or speaking with a counselor can help. If vision has been affected, low-vision rehabilitation services can assist with maintaining independence and quality of life. Staying informed and actively participating in treatment decisions can help patients feel more confident and in control of their care.
When to See a Retina Specialist
Primary care providers and optometrists play a key role in identifying which patients need retina care. Knowing when and how urgently to refer can make a significant difference in outcomes.
The following findings during a screening exam should lead to a referral to a retina specialist.
- Any level of macular edema detected on exam or imaging
- Severe nonproliferative diabetic retinopathy, which is a precursor to the proliferative stage
- Any proliferative diabetic retinopathy, including the presence of new abnormal blood vessels
- Visual acuity worse than 20/40 or patient-reported symptomatic vision changes
- Neovascularization of the iris or angle, meaning new blood vessel growth in the front of the eye, which requires urgent referral
When in doubt, referring for a baseline retinal evaluation is a reasonable and proactive step for any patient with diabetes and additional risk factors.
Not all referrals carry the same level of urgency. High-risk proliferative diabetic retinopathy, defined by larger areas of new vessel growth on the optic disc or any new vessel growth accompanied by bleeding, should be referred within 24 to 48 hours. Lower-risk proliferative disease may be referred within two to four weeks. Patients with new vessel growth in the front part of the eye require urgent referral because prompt treatment may prevent severe complications such as neovascular glaucoma.
Some patients benefit from more frequent retinal evaluations beyond the standard annual schedule. These include pregnant women with pre-existing diabetes, adolescents going through puberty, patients starting rapid glucose-lowering therapies such as semaglutide, and anyone with a long history of poorly controlled blood sugar. For these patients, earlier and more frequent retinal evaluation is a sound and proactive approach.
Frequently Asked Questions
These answers address common questions patients ask when navigating a diagnosis of diabetic retinopathy.
Yes, and this is one of the most important things to understand about the condition. Significant retinal damage can develop and continue to worsen while your vision appears unchanged. By the time you notice a difference in your sight, the disease may have already reached a more advanced and harder-to-treat stage. This is why annual dilated eye exams are recommended for all people with diabetes, not just those with symptoms.
The speed of progression varies from person to person. Some people have mild disease that remains stable for years, while others experience rapid advancement over a matter of months. The rate of progression is closely tied to how well blood sugar, blood pressure, and cholesterol are controlled. Pregnancy, puberty, and starting a fast-acting glucose-lowering medication can all accelerate changes in the retina, which is why these situations call for closer monitoring.
Before each injection, anesthetic drops are used to numb the surface of the eye. Most patients report feeling pressure or mild awareness during the procedure rather than sharp pain. A gritty sensation or mild redness may linger for a day or two afterward but typically resolves on its own. While the idea of an eye injection can feel alarming, most patients find the experience much more manageable than they anticipated and adjust well to ongoing treatment.
Without treatment, diabetic retinopathy can lead to permanent and severe vision loss. Proliferative disease can cause bleeding inside the eye, the formation of scar tissue, and retinal detachment. Diabetic macular edema can destroy the central vision needed for reading, driving, and recognizing faces. The damage caused by advanced disease may not be fully reversible, which makes early detection and timely treatment so important.
This is an important question to raise with both your diabetes care provider and your retina specialist. There is growing evidence that rapid improvements in blood sugar control, including from medications such as semaglutide, can speed up the development or worsening of diabetic retinopathy in some people, particularly those who had previously uncontrolled blood sugar. A retina specialist may recommend a baseline exam before starting the medication and more frequent monitoring during the first year. Proactively discussing this before treatment begins is the most cautious and protective approach.
Spontaneous improvement without treatment is not something patients should count on. While tightly controlled blood sugar and blood pressure can slow progression and support overall eye health, meaningful reversal of existing retinal damage generally requires active medical treatment. Anti-VEGF injections have been shown to reduce the severity of diabetic retinopathy and can lead to measurable improvement on imaging for some patients, but this is a result of treatment, not the natural course of the disease.
Schedule Your Diabetic Eye Exam Today
At EyeCare Consultants of NJ, our team of experienced ophthalmologists and retinal specialists is dedicated to helping patients across New Jersey preserve their vision through expert, personalized care. Whether you are newly diagnosed with diabetes or have been managing the condition for years, we are here to provide thorough evaluation, advanced treatment, and ongoing support. We encourage you to schedule an appointment at our Edison or Woodland Park location and take a proactive step toward protecting your sight.
Friendly and caring retina surgeon, I highly recommend Dr. Arnett.
Shirly
Highly recommend Dr. Kayserman. Extremely competent, experienced, highly personable
LS
Dr. Kayserman was gentle, efficient and provided extremely valuable information which was comforting to me. I felt better after seeing her and am looking forward to additional visits.
Lina N.
Dr. Larisa Kayzerman is a wonderful doctor. She is very attentive. Doctor maid operation the same day. I'm very satisfied with the result.
Rafail
Dr. Arnett deserves 10 stars. He is the best.
AJ