If you have type 2 diabetes, you need a dilated eye exam at the time of diagnosis and at least once every year after that. If you have type 1 diabetes, annual exams should begin five years after your diagnosis. These timelines come from the American Academy of Ophthalmology’s 2025 guidelines, and they apply even if your vision feels perfectly fine.
Why the Timeline Differs for Type 1 and Type 2
Type 2 diabetes often goes undetected for years before a formal diagnosis. By the time you learn you have it, elevated blood sugar may have already been damaging the tiny blood vessels in your retina. That’s why screening starts immediately. Roughly one in five people with type 2 diabetes already has some degree of retinopathy at the time of diagnosis.
Type 1 diabetes, on the other hand, is usually caught quickly because symptoms appear fast. The retinal damage takes longer to develop, so the first eye exam can wait until five years after onset. One important exception: puberty accelerates retinopathy progression, so adolescents with type 1 diabetes may need to start screening earlier and be monitored more closely during those years.
What Happens During a Diabetic Eye Exam
A standard diabetic eye screening is a dilated retinal exam performed by an ophthalmologist or optometrist. Drops widen your pupils so the doctor can see the retina, macula, and blood vessels at the back of your eye. The whole visit typically takes 30 to 60 minutes, though your vision will stay blurry for a few hours afterward from the dilation drops, so plan to have someone drive you home or wear sunglasses.
In some cases, your doctor may use optical coherence tomography (OCT), a painless imaging scan that creates a detailed cross-section of your retina. This is especially useful for detecting swelling in the macula, the part of the retina responsible for sharp central vision. Fundus photography, where a specialized camera captures images of the back of your eye, is another common tool and can serve as the screening exam on its own.
Teleretinal Screening at Your Primary Care Office
Getting to an eye specialist every year is a barrier for many people. Teleretinal screening programs address this by placing retinal cameras in primary care offices and community health centers. A technician takes photos of your retina during a routine visit, and an ophthalmologist reviews the images remotely. If anything looks concerning, you’re referred for a full in-person exam.
About 7% of images turn out ungradable due to poor quality, requiring either repeat imaging or a referral. But for the vast majority of patients, this approach counts as a valid annual screening and removes the need for a separate appointment with a specialist.
When You Need Exams More Often Than Once a Year
Annual screening is the baseline for people with no signs of retinopathy. Once damage is detected, the schedule tightens considerably depending on severity:
- Moderate nonproliferative retinopathy: every 6 to 9 months
- Severe nonproliferative retinopathy: every 3 to 6 months
- Proliferative retinopathy (new, fragile blood vessels growing on the retina): every 3 months
- Diabetic macular edema (swelling in the center of the retina): every 1 to 4 months, depending on whether treatment is underway
Your ophthalmologist will set the exact interval based on how quickly changes are progressing. If you’re receiving treatment such as injections to reduce swelling or laser therapy to seal leaking blood vessels, you’ll typically have imaging at every visit to track the response.
Pregnancy Requires Extra Monitoring
Pregnancy can accelerate diabetic retinopathy rapidly. If you have type 1 or type 2 diabetes and become pregnant, guidelines recommend an eye exam during the first trimester, with follow-up ideally every three months through the pregnancy and into the postpartum period. This applies to pre-existing diabetes only. Gestational diabetes, which develops during pregnancy, does not carry the same retinopathy risk and does not require this screening schedule.
Why Screening Matters When You Have No Symptoms
Diabetic retinopathy causes no symptoms in its early stages. You can have 20/20 vision while blood vessels in your retina are already leaking or closing off. By the time you notice blurred vision, floaters, or dark spots, the damage is often advanced. This is what makes the annual exam so critical: it catches problems you cannot feel.
The numbers behind early detection are striking. Systematic screening can identify about 88% of people with serious retinopathy, and roughly 87% of those cases are treatable at that stage. Laser treatment alone reduces the risk of blindness by about 61%, and when you combine effective screening with timely treatment, the overall risk of going blind from diabetic retinopathy drops by an estimated 56%.
Blood Sugar Control and Your Risk Level
How well you manage your blood sugar directly affects how fast retinopathy develops and progresses. Keeping your A1c below 7% consistently reduces the risk of progression. Research shows that people with A1c levels above 9% have higher rates of the most severe form, proliferative retinopathy, where abnormal blood vessels grow on the retina’s surface and can bleed or cause retinal detachment.
Other factors that raise your risk include high blood pressure, high cholesterol, longer duration of diabetes, and kidney disease. If you have several of these risk factors, your eye doctor may recommend exams more frequently than once a year even before any retinopathy shows up. Blood sugar control doesn’t eliminate the need for screening, but it does give you a meaningful edge: fewer changes at each exam, slower progression if changes do appear, and more treatment options if intervention becomes necessary.