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Diabetic Retinopathy: Symptoms, Stages, Treatment & How to Protect Your Vision
Living with diabetes? Your eyes need protecting too. Diabetic retinopathy slowly damages the tiny blood vessels at the back of the eye, often with no warning signs at first. The good news is that regular eye checks and timely treatment can save your sight.
Protect your retina before symptoms start.Early diabetic retinopathy usually feels like nothing. A simple dilated eye exam is the best way to catch it in time.
Quick Answer
Diabetic retinopathy is an eye complication of diabetes in which long-term high blood sugar damages the tiny blood vessels of the retina, the light-sensing layer at the back of the eye. The vessels can leak, swell or close off, and in advanced stages weak new vessels grow and bleed. It often causes no symptoms early, then blurred vision, floaters, dark patches or sudden vision loss.
Diabetic retinopathy treatment depends on the stage. Early disease is watched closely while you control blood sugar, blood pressure and cholesterol. Advanced disease or macular swelling is treated with anti-VEGF eye injections, laser, steroid injections or, in severe cases, vitrectomy surgery. Treatment can stop or slow vision loss but does not cure the condition, so lifelong check-ups matter. If you have diabetes, get a dilated eye exam every year, and see a doctor the same day for sudden vision loss.
Key Takeaways
- Diabetic retinopathy can be present for years without any symptoms, so you cannot rely on how your eyes feel.
- The longer you have diabetes, and the higher your blood sugar, blood pressure and cholesterol, the greater the risk.
- Early stages may need no treatment, only close monitoring and better diabetes control.
- Anti-VEGF injections and laser are the main treatments for advanced disease and for swelling of the macula, and vitrectomy is for bleeding or detachment.
- Damage that has already happened usually cannot be reversed, but treatment can protect the vision you still have, and sometimes improve it.
- Sudden vision loss, a shower of floaters or a dark curtain over your vision needs same-day care.
What Is Diabetic Retinopathy?
The retina is a thin layer at the back of your eye that turns light into signals for your brain. It depends on a network of very fine blood vessels. In diabetic retinopathy, high blood sugar over many years harms these vessels. They weaken, leak fluid or blood, or get blocked.
How does diabetes damage the retina?
Too much sugar in the blood injures the walls of small blood vessels. When the vessels close off, parts of the retina don't get enough blood. The retina then sends out signals to grow new vessels to make up for it. These new vessels are fragile and abnormal, and they can bleed into the eye or pull on the retina. This happens with type 1, type 2 and gestational diabetes.
How does diabetic retinopathy progress from mild to severe?
Doctors group the disease into two main phases, and the early one is often divided into three levels:
Tiny bulges form in the retinal vessels and may leak a little fluid. Vision is usually normal.
More vessels get blocked, so parts of the retina receive less blood. Leakage increases.
Large areas of the retina are starved of blood. The eye is close to growing new abnormal vessels, so follow-up must be close.
Fragile new vessels grow, can bleed into the eye, and scar tissue can pull the retina loose. This stage threatens vision the most.
What is diabetic macular oedema?
The macula is the centre of the retina, which you use for reading, recognising faces and driving. In diabetic macular oedema (DME), fluid leaks into the macula and makes it swell. This blurs central vision. DME can happen at any stage, even early, which is why a person with "mild" retinopathy can still have trouble reading.
Is diabetic retinopathy the same as "diabetic eye disease"?
Not quite. "Diabetic eye disease" is the wider term. It includes diabetic retinopathy and DME, and also an earlier or faster-developing cataract and a higher risk of glaucoma. A full diabetic eye check looks at all of these.
What Are the Symptoms of Diabetic Retinopathy?
In the early stages there are usually no symptoms at all. As the disease advances, you may notice:
Why can't I feel diabetic retinopathy in the early stages?
The retina has no pain nerves, and early damage often happens away from the centre, where you are not using your sharpest vision. Your brain also fills in small gaps. So, by the time you notice a problem, the damage may already be significant. That is why "my vision is fine" does not mean "my retina is fine".
What do floaters and sudden dark spots mean?
A few old, drifting floaters are common and harmless. But a sudden increase in floaters, a dark or red haze, or a new dark patch can mean the weak new vessels have bled into the eye gel (vitreous haemorrhage). This needs to be examined urgently.
Does diabetic retinopathy cause eye pain or redness?
Usually not. Diabetic retinopathy itself is painless. If you have eye pain, a red eye and blurred vision with halos around lights, it can mean a rise in eye pressure, which needs urgent care.
What Causes Diabetic Retinopathy and Who Is at Risk?
What exactly causes diabetic retinopathy?
The cause is long-term high blood sugar, which damages the small vessels of the retina. High blood pressure and high cholesterol add to the damage. The longer the diabetes lasts and the less well it is controlled, the greater the chance of retinopathy.
Who is most likely to get diabetic retinopathy?
- People who have had diabetes for many years
- People with poorly controlled blood sugar or a high HbA1c
- People with high blood pressure or high cholesterol
- People with kidney disease or heart disease
- People who smoke or use tobacco
- Pregnant women with diabetes
Can I get diabetic retinopathy even if my sugar is under control?
Yes, though the risk is lower. Good control greatly reduces your chances and slows progression, but it does not remove the risk completely. Some people with excellent control still develop changes, which is why yearly check-ups are advised for everyone with diabetes.
Can prediabetes or gestational diabetes affect the eyes?
Retinopathy can occur with gestational diabetes, and early eye changes are sometimes seen even before diabetes is formally diagnosed. If you have prediabetes or had gestational diabetes, discuss an eye check with your doctor.
What Happens If Diabetic Retinopathy Is Left Untreated?
Untreated, the disease can lead to several serious problems. Many of them can be prevented if the eye is checked and treated in time.
New fragile vessels bleed into the clear gel inside the eye, causing sudden floaters or a dark haze.
Scar tissue pulls the retina away from the back of the eye. This is an emergency.
Abnormal vessels block the eye's drainage and raise eye pressure. It can be painful and damage the optic nerve.
Fluid or poor blood flow in the central retina leads to blurred central vision.
Can diabetic retinopathy lead to blindness?
It can, if it is advanced and untreated. But blindness is not inevitable. With regular screening, good diabetes care and timely treatment, most severe vision loss can be prevented. The key is catching changes before you notice them.
How Is Diabetic Retinopathy Diagnosed?
Which tests do eye doctors use to check for diabetic retinopathy?
- History and vision checkYour diabetes history, medicines, HbA1c and symptoms, followed by a visual acuity test.
- Dilated retinal examinationDrops widen your pupils so the doctor can see the whole retina. This is the main test. See our pages on eye dilation and fundus examination.
- OCT scanA quick, painless scan that shows the layers of the retina and measures swelling. Read about OCT (optical coherence tomography).
- Fluorescein angiographyA harmless dye is injected into a vein in your arm, then photos of the retina show which vessels are leaking or blocked. See fluorescein angiography.
- Eye pressure checkChecks for raised pressure, using applanation tonometry.
Is the dilated eye exam painful or safe to do alone?
It is not painful. The drops sting briefly. Your near vision and glare sensitivity can stay blurred for a few hours, so wear sunglasses and bring someone to drive or accompany you home. Plan not to do detailed work immediately afterwards.
How often should I get my eyes checked if I have diabetes?
- Type 2 diabetes: a dilated eye exam as soon as you are diagnosed.
- Type 1 diabetes: within about five years of diagnosis, and earlier if you are in your teens or have symptoms.
- No retinopathy found: repeat at least every 1–2 years. Many retina specialists in India advise a yearly exam, which is the safer default.
- Retinopathy found: at least yearly, and often every 3–6 months if it is moderate or worse.
- Pregnancy: an exam before conception or in the first trimester, then close follow-up through pregnancy and for about a year after delivery.
Your doctor will set the exact schedule for you.
What should I bring to my diabetic eye appointment?
- When your diabetes was diagnosed and what medicines or insulin you take
- Your latest HbA1c, blood sugar, kidney and cholesterol reports
- A list of all supplements and herbal products, since some can affect bleeding or interact with medicines
- Your current glasses and any old eye reports
- A family member or friend for the journey home
Diabetic Retinopathy Treatment: What Are the Options?
The right treatment depends on the stage of the disease, whether there is swelling in the macula, and your overall health. Your retina specialist will tailor it for each eye.
What is the stage-wise approach to treatment?
- Mild or moderate early diseaseOften no eye treatment yet. Your doctor watches closely with regular exams and scans, while you tighten control of sugar, blood pressure and cholesterol.
- Severe early diseaseVery close follow-up. Laser may sometimes be advised before new vessels appear, especially if you cannot attend visits regularly.
- Macular oedema or proliferative diseaseAnti-VEGF injections, laser, or both. Steroid injections may be added if swelling persists.
- Advanced complicationsVitrectomy surgery for non-clearing bleeding, scar tissue or retinal detachment.
Does early diabetic retinopathy need treatment?
Usually not at once. The most powerful "treatment" at this stage is good control of blood sugar, blood pressure and cholesterol, plus regular eye exams. Starting treatment too early is not necessary, but missing follow-ups is a bigger risk.
What are anti-VEGF injections and do they hurt?
VEGF is a signal that makes abnormal vessels grow and leak. Anti-VEGF medicines, such as ranibizumab, aflibercept or bevacizumab, block this signal. They reduce swelling and shrink abnormal vessels, and they can improve vision in many people with macular oedema. The eye is numbed with drops, and the injection takes only a few moments. You may feel pressure and have mild irritation or a small red spot afterwards. Serious problems such as infection or a rise in eye pressure are uncommon but possible, so report pain, increasing redness or falling vision at once. Injections are usually repeated over weeks or months.
How does laser treatment work for diabetic retinopathy?
There are two main types. Focal laser seals specific leaking vessels near the macula to reduce swelling. Panretinal photocoagulation (PRP) treats the outer retina to shrink abnormal vessels and stop them growing. Laser is done in a clinic with numbing drops and may need more than one session. It mainly protects the vision you have. Side effects can include temporary blurring and some loss of side or night vision.
When are steroid injections or implants used?
If macular swelling doesn't settle well with anti-VEGF, a steroid injection or implant can reduce inflammation and fluid. Steroids can raise eye pressure and speed up cataract, so your doctor will monitor you.
What is vitrectomy surgery and when is it needed?
Vitrectomy is surgery to remove blood-filled gel from inside the eye, and to remove scar tissue or repair a detached retina. It is used in advanced cases, for example when a bleed does not clear on its own. It is performed in an operating theatre, usually under local anaesthesia with sedation, and the eye needs time to heal afterwards.
Are injections and laser used together?
Yes. For proliferative disease, doctors often use laser and injections together, because injections work quickly and laser gives longer-lasting protection. Your specialist chooses the mix.
Does diabetic retinopathy treatment restore vision?
The main aim is to stop or slow further loss. Anti-VEGF injections can improve vision in some people, especially when macular swelling is the problem. Laser usually stabilises vision rather than restoring it. The earlier you are treated, the better your outcome.
Will cataract surgery be safe if I have diabetic retinopathy?
Usually yes, but the retina should be assessed and any swelling treated first, because surgery can sometimes make macular oedema worse. Tell your cataract surgeon that you have diabetes, and ask for a retina check beforehand.
Do any tablets, supplements or natural remedies treat diabetic retinopathy?
There is no proven natural cure, and no herbal or Ayurvedic product has been shown to reverse retinal damage. Please don't delay laser or injections in favour of unproven remedies. Some cholesterol medicines, such as fenofibrate, have been shown in studies to slow progression in some people, but only your doctor can say if this is right for you. Always tell your doctors about supplements you take.
Can Diabetic Retinopathy Be Reversed or Cured?
Is it possible to undo the damage from diabetic retinopathy?
Honestly, it cannot be completely cured, and damage that has already happened is usually permanent. But it is far from hopeless. In early disease, better blood sugar and blood pressure control can slow it, and sometimes mild changes improve. In advanced disease, treatment can protect your remaining vision and, in some people, improve it.
Can my vision come back after treatment?
Sometimes it improves, especially when swelling in the macula is treated early. Vision lost because of scarred or dead retinal cells usually does not return. This is exactly why early detection is so valuable.
Is diabetic retinopathy a lifelong condition?
Yes. Once you have it, you need regular monitoring for life, and you may need repeat treatment later. The good news is that with the right care, many people keep useful vision for many years.
Can lowering my blood sugar quickly cause problems for my eyes?
In some people with existing retinopathy, a very rapid drop in blood sugar can cause a temporary worsening of the retina. This does not mean you should avoid good control. It means you should tell your eye doctor when your diabetes treatment changes a lot, such as starting insulin or a new strong medicine, so your eyes can be checked.
How Can You Protect Your Eyes If You Have Diabetes?
Check sugar regularly and take medicines as prescribed. Many adults aim for an HbA1c of around 7%, but your doctor sets your target.
High pressure adds to retinal damage. Take your medicines and limit salt.
Lower cholesterol and triglycerides may slow retinal changes.
Smoking harms blood vessels everywhere, including the eyes.
Book your yearly dilated exam, even when your vision feels perfect.
Regular walking and exercise help control sugar and blood pressure.
What should I eat to protect my eyes with diabetes?
Choose a balanced diabetic diet with plenty of vegetables, leafy greens, pulses, whole grains, nuts and fish, and limit sweets, refined flour, fried food and sugary drinks. Food supports blood sugar control, but it cannot replace eye check-ups or treatment.
Is exercise safe if I have diabetic retinopathy?
Regular walking and moderate exercise are good for most people. If you have advanced retinopathy or a recent bleed, ask your retina specialist before doing heavy lifting, intense straining or high-impact sports, since these may raise the chance of bleeding.
Can I keep working, using screens and driving?
Many people can, with the right care. Screens do not cause retinopathy. Driving depends on how well you see, particularly at night and at the sides, so ask your doctor about your vision. If vision is reduced, vision therapy and low vision aids can help you stay independent.
Diabetic Retinopathy in Pregnancy, Young People and Kidney Disease
Can pregnancy make diabetic retinopathy worse?
Yes. Pregnancy can speed up retinopathy. If you have diabetes and are planning a pregnancy, get a dilated eye exam before you conceive or early in the first trimester, then follow your doctor's schedule during pregnancy and for around a year after delivery.
Can teenagers and young adults with type 1 diabetes get diabetic retinopathy?
It is uncommon in the first few years, but risk builds with time. Regular eye checks should start within a few years of diagnosis, and earlier once puberty begins.
Does kidney disease increase the risk to my eyes?
Yes. The tiny vessels in the kidney and the retina are affected in similar ways, so people with diabetic kidney disease have a higher chance of retinopathy. If your kidneys are affected, keep a closer eye on your eyes.
When Should You See an Eye Doctor for Diabetic Retinopathy?
Book a dilated eye exam if:
- You have diabetes and have not had an eye exam in the last year
- You notice blurry or fluctuating vision, faded colours or trouble at night
- You notice new floaters or wavy lines
- You are pregnant or planning a pregnancy with diabetes
- Your diabetes treatment has changed a lot
Get seen the same day if you have:
- Sudden loss or sharp drop in vision in one or both eyes
- A sudden shower of floaters, flashes of light or a dark curtain across your vision
- A red, painful eye with blurred vision or halos around lights
- A sudden dark or red haze
What Our Retina Expert Has to Say
Director · Retina, Cataract, LASIK & Uvea Specialist · Medical reviewer of this page
20+ years of experience"The hardest part of diabetic retinopathy is that it is quiet. Patients often arrive only when their vision has already dropped. If you have diabetes, treat the yearly retina check like your HbA1c test: non-negotiable. When we catch changes early, we can usually protect sight with laser or injections. When we catch them late, we are fighting to save what is left."
Medical content reviewed on November 2, 2026, and updated when new evidence changes advice. See the references below.
What to Expect When You Visit Save Sight Centre for Diabetic Eye Care
Your visit starts with questions about your diabetes and eyes, followed by a dilated retinal exam and, if needed, imaging such as OCT or angiography. You will leave with a clear plan, including how often to return and what to do if symptoms change. Our retina and uvea care team manages diabetic eye problems, and you can meet our eye specialists before you book.
Monday to Saturday, 9:00 AM – 7:00 PM
NABH & ISO accredited · 25+ years · 1,70,000+ patients treated. For more guides, visit our eye care blog.
Frequently Asked Questions About Diabetic Retinopathy
What are the early signs of diabetic retinopathy?
Early diabetic retinopathy usually has no symptoms. As it progresses you may notice blurred or fluctuating vision, floaters, dark patches, faded colours or poor night vision. Because damage can build silently, everyone with diabetes should have a dilated eye exam at least once a year, even when vision feels normal.
Can diabetic retinopathy be reversed?
Damage that has already happened is usually permanent, so diabetic retinopathy cannot be fully cured. However, early changes can slow or sometimes improve with good control of blood sugar, blood pressure and cholesterol, and treatments like anti-VEGF injections or laser can protect and, in some people, improve vision. Early detection gives the best results.
What are the stages of diabetic retinopathy?
There are two main phases. Non-proliferative (early) is divided into mild, moderate and severe, as more retinal vessels leak or close. Proliferative (advanced) is when fragile new vessels grow and can bleed or pull on the retina. Diabetic macular oedema, swelling of the central retina, can occur at any stage.
How is diabetic retinopathy treated?
Treatment depends on the stage. Early disease is monitored while you control blood sugar, blood pressure and cholesterol. Advanced disease or macular swelling is treated with anti-VEGF injections, laser, and sometimes steroid injections. Vitrectomy surgery is used for non-clearing bleeding or retinal detachment. Treatment aims to stop or slow vision loss.
Can diabetic retinopathy be treated without surgery?
Often yes. Most people are managed without major surgery, using regular monitoring, better diabetes control, anti-VEGF eye injections, steroid injections and laser done in a clinic. Surgery, called vitrectomy, is reserved for advanced problems such as heavy bleeding that does not clear, scar tissue or a detached retina.
How often should a diabetic get an eye exam?
People with type 2 diabetes need a dilated eye exam when diagnosed, and people with type 1 within about five years. If no retinopathy is found, repeat at least every one to two years, although many specialists advise yearly. If retinopathy is present, exams are needed at least yearly, and more often if it is moderate or worse.
How fast does diabetic retinopathy progress?
It varies. Many people have slow changes over years, especially with good control, while others progress faster when sugar, blood pressure or cholesterol are high. Advanced disease can cause a sudden bleed. Regular exams let your doctor spot progression early and treat before vision is affected.
Does diabetic retinopathy cause pain?
No, diabetic retinopathy itself is usually painless, which is why it can go unnoticed. Eye pain, a red eye, halos around lights or sudden vision loss are warning signs of a different or more serious problem, such as raised eye pressure or retinal detachment, and need urgent attention.
Can diabetic retinopathy affect only one eye?
It usually affects both eyes, but one eye can be more advanced than the other. Each eye has to be examined and treated on its own merits. Even if only one eye seems affected, the other needs regular checks because it can change over time.
How much does diabetic retinopathy treatment cost in Delhi?
Cost depends on the stage and treatment. A diabetic eye exam costs much less than injections, laser or vitrectomy surgery, and the number of injection or laser sessions also changes the total. Book a consultation at Save Sight Centre and your retina specialist will explain the plan and expected cost before you begin.
Have Diabetes and Not Had a Retina Check This Year?
Book a dilated eye exam at Save Sight Centre, Adarsh Nagar, North Delhi. Catching changes early is the best way to protect your sight.
References and Further Reading
Disclaimer: For general awareness only, not medical advice. Please consult a doctor to find the cause and best treatment for your eyes. Results vary from person to person.