What Is Diabetic Retinopathy?

If you live with diabetes, at some point someone on your care team will tell you to get your eyes checked — even if your vision feels perfectly fine. That check is mainly looking for diabetic retinopathy, and this guide walks you through what to expect from it. Retinopathy is the name for damage to the small blood vessels in the retina, the light-sensitive layer at the back of the eye. Over time, higher blood sugar can weaken those tiny vessels so they leak fluid or bleed, and the retina that depends on them starts to struggle. The short video above, "Diabetic Retinopathy Screening," runs just under two minutes and shows a newer fundus camera being used to examine the retina without dilating the pupil — a glimpse of how quick and painless that screening view can be.

What you will notice — and what you won't

Here's the catch that surprises most people: early on, you usually notice nothing at all. Vision can stay sharp while small changes are already underway at the back of the eye, which is exactly why screening exists rather than waiting for symptoms. The related video "Types of diabetic retinopathy" explains the two broad stages clinicians talk about: an earlier, non-proliferative stage, where vessel changes are mild, and a later, proliferative stage, where fragile new vessels grow and are more likely to bleed. When symptoms do appear, they tend to be things like blurred or wobbly vision, floaters, darker or empty patches, and colours looking washed out. Any of those is worth reporting promptly rather than waiting for the next routine check — and they're quite different from the sudden curtain-like shadow described in our guide to a retinal detachment, though diabetes can raise the risk of that problem too.

What happens at the screening appointment

Expect a straightforward visit. You'll usually read letters on a chart first, so the team has a record of what you can actually see. Then the back of the eye is examined and photographed. Traditionally that meant dilating drops that widen the pupil and leave your vision blurry and light-sensitive for a while; the camera in the video above is one of the newer approaches designed to capture the retinal view without those drops, though many clinics still use drops, and both routes aim at the same detailed picture. The photographs are then graded for leaking vessels, swelling near the central retina, and any new vessel growth. You may leave with a simple "no changes, come back next time" — that is the result screening is designed to deliver, year after year, and it sits alongside the wider day-to-day care covered in our overview of type 2 diabetes.

What happens if changes are found

Finding changes is not the same as losing sight — it means treatment can start while vision is still good. Depending on what the photographs show, options include closer monitoring, laser treatment to seal leaking areas and discourage fragile new vessels, injections into the eye that reduce swelling and vessel growth, or, in more advanced cases, surgery inside the eye to clear blood and repair the retina. Just as important is the background work: steadier blood sugar, blood pressure, and cholesterol all slow the vessel damage down, so the eye team and your diabetes team are really treating the same problem from two ends. The pattern to hold onto is a hopeful one — this is a condition that screening catches early, and early is when it is most manageable.

Frequently Asked Questions

Does diabetic retinopathy always cause symptoms? No — and that's the point of screening. In its early stage it usually causes no symptoms at all, even though changes can already be seen on retinal photographs. Symptoms such as blurring, floaters, or patches in your vision tend to come later.

Do I need eye screening if my vision is fine? Yes. Because early retinopathy is silent, people with diabetes are offered regular retinal screening whether or not they notice anything. The check is quick, and a clear result is reassurance; a changed result means treatment can begin early.

Will I need dilating drops at the appointment? It depends on the clinic. Many still use drops to widen the pupil for a clear view and photographs, which can blur vision for a few hours. Some newer fundus cameras, like the one in the video above, are designed to image the retina without dilation.

Can diabetic retinopathy be reversed? Early vessel changes can stabilise, and swelling can often be reduced with treatment, but damaged areas don't simply return to normal. Laser treatment, injections, and surgery aim to protect the vision you have, which is why earlier treatment tends to do better.

MedicalVideos.com has published trusted medical videos since 2007. The site was founded by Dr. Mohamed Ibrahim, MD, PhD — physician-scientist.

Educational only — this article is general information about diabetic retinopathy, not medical advice and not a diagnosis. If you have diabetes, keep your scheduled eye screening appointments, and report new changes in your vision to your care team promptly.