Diabetic retinopathy is treated with a combination of eye-specific procedures and whole-body management, and the right approach depends on how far the disease has progressed. In early stages, tight blood sugar and blood pressure control can slow or even halt damage. In more advanced stages, injections into the eye, laser therapy, or surgery become necessary to preserve vision.
Why Blood Sugar Control Comes First
Every treatment for diabetic retinopathy works better when blood sugar is well managed. High blood sugar damages the tiny blood vessels in the retina over time, and bringing it down reduces the rate at which that damage accumulates. The target most guidelines recommend is an HbA1c of 7% or lower. Data from large cohorts shows the lowest rates of retinopathy occur when HbA1c stays at or below 6.5%, though reaching that level safely depends on the individual and the tools available to them.
Blood pressure matters almost as much. Keeping blood pressure below 130/80 is a standard target for people with diabetes, and when retinopathy is already present, some guidelines push the diastolic target even lower, to 75 or below. High blood pressure puts extra mechanical stress on already weakened retinal blood vessels, accelerating leakage and swelling. Managing both blood sugar and blood pressure won’t reverse damage that’s already done, but it meaningfully slows progression and can delay or reduce the need for more invasive treatments.
Anti-VEGF Injections
The most common active treatment for diabetic retinopathy, especially when it involves swelling in the central retina (called diabetic macular edema), is a series of injections directly into the eye. These injections deliver medication that blocks a protein called VEGF, which your body produces to grow new blood vessels. In diabetic retinopathy, VEGF drives the growth of fragile, abnormal blood vessels that leak fluid and blood into the retina. Blocking it reduces that leakage and slows further damage.
A meta-analysis reviewed by the UK’s National Institute for Health and Care Excellence found that anti-VEGF injections were superior to laser treatment at preventing vision loss over two years. They also reduced the risk of macular swelling by about 71%, cut the incidence of bleeding inside the eye, and roughly halved the chance of retinal detachment compared to laser alone.
What the Injection Feels Like
If you’ve never had an eye injection, the idea can sound alarming, but the reality is more routine than you might expect. The procedure happens in the doctor’s office, usually with you reclined in a chair. Numbing drops or gel are applied to the eye and eyelids first. The skin around the eye is cleaned with an antiseptic solution, and a small clip holds your eyelids open so you don’t need to worry about blinking. You’ll be asked to look in a specific direction while the medication is injected through the white part of the eye with a very fine needle. Most people feel pressure rather than pain. The whole process, from start to finish, takes about 10 to 15 minutes.
The catch is that these injections aren’t a one-time fix. Most people need them every four to eight weeks at first, with the interval gradually lengthening as the eye responds. Treatment can continue for months or years, and staying on schedule is critical to keeping the benefits.
Laser Treatment
Laser therapy has been a cornerstone of diabetic retinopathy treatment for decades, and it remains important even as injections have taken a larger role. The most common form is called panretinal photocoagulation, or PRP, which is used when abnormal new blood vessels have started growing on the retina (a stage called proliferative diabetic retinopathy).
The laser works by deliberately destroying small areas of the outer retina. This sounds counterintuitive, but the logic is straightforward: the damaged retina has a high demand for oxygen, and that oxygen deficit is what triggers the growth of abnormal blood vessels. By reducing the amount of retinal tissue consuming oxygen, the laser removes the signal driving that dangerous new growth. The treatment is typically spread across several sessions.
PRP is effective at preventing severe vision loss, but it comes with trade-offs. Because the laser treats the peripheral retina, it can permanently reduce your side vision and your ability to see well at night. Contrast sensitivity can also decrease. These changes may be significant enough to affect your ability to drive legally, and if both eyes are treated, you may need to notify your licensing authority. For many people, though, the trade-off is worthwhile: losing some peripheral vision is far preferable to losing central vision entirely.
Focal laser treatment is a separate, more targeted approach sometimes used for localized areas of leakage in the macula, though anti-VEGF injections have largely replaced it for macular edema.
Vitrectomy Surgery
When diabetic retinopathy reaches its most advanced stages, surgery may be the only option. A vitrectomy involves removing the gel-like substance (the vitreous) that fills the inside of the eye. In severe diabetic retinopathy, this gel can become clouded with blood from ruptured vessels, blocking light from reaching the retina and making vision very poor.
During the procedure, the surgeon removes the clouded vitreous and replaces it with a clear solution. If scar tissue has formed on the retina and is pulling it out of position (a condition called tractional retinal detachment), the surgeon can peel that tissue away. The operation also gives the surgeon direct access to the retina for additional laser treatment that might not have been possible with blood-filled vitreous in the way.
Recovery from vitrectomy varies. Vision improvement can take weeks to months, and some people need to maintain a specific head position for a period after surgery to help the retina heal. Vitrectomy doesn’t cure diabetic retinopathy, but it can restore vision that would otherwise be permanently lost to bleeding or detachment.
How Treatments Are Combined
In practice, most people with moderate to advanced diabetic retinopathy receive more than one type of treatment. Anti-VEGF injections might be started first to control swelling and leakage, with laser treatment added later to address proliferative changes. If bleeding doesn’t clear on its own or scar tissue develops, vitrectomy becomes part of the plan. Your eye specialist will adjust the combination based on how your retina responds at each visit.
Steroid implants placed inside the eye are another option, typically reserved for macular edema that hasn’t responded well to anti-VEGF therapy. These slowly release anti-inflammatory medication over weeks to months. They can be effective, but they carry a higher risk of raising eye pressure and accelerating cataracts, so they’re generally not a first choice.
Screening and Early Detection
The most effective treatment for diabetic retinopathy is catching it before symptoms appear. The American Diabetes Association recommends that people with type 2 diabetes get a dilated eye exam at the time of diagnosis, since retinopathy may already be developing. For type 1 diabetes, the first comprehensive eye exam should happen within five years of diagnosis.
If those initial exams show no retinopathy and blood sugar is well controlled, screening every one to two years is generally sufficient. Once any level of retinopathy is detected, exams should happen at least annually, and more often if the disease is progressing. Many people with early diabetic retinopathy have no visual symptoms at all, which is exactly why regular screening matters. By the time you notice blurred or patchy vision, significant damage may already be done.