The stages and symptoms of diabetic retinopathy can be difficult to recognize because retinal damage may begin before your eyesight noticeably changes. People with diabetes in Lubbock and throughout West Texas should not wait until they experience blurry vision or floaters before scheduling a comprehensive dilated eye exam.
Diabetic retinopathy develops when diabetes damages the small blood vessels that nourish the retina, the light-sensitive tissue at the back of the eye. Without timely monitoring, the condition can progress and threaten vision.
The good news is that early detection, diabetes management, and appropriate eye care can reduce the risk of serious vision loss.
Why Diabetic Retinopathy Can Develop Without Warning
High blood sugar can gradually weaken or damage blood vessels throughout the body, including the tiny vessels inside the retina. These vessels may swell, leak fluid, close, or trigger the growth of abnormal new blood vessels.
This process often begins without pain or obvious vision changes. The National Eye Institute explains that early diabetic retinopathy commonly has no symptoms. A dilated eye examination may detect retinal changes before the person realizes anything is wrong.
Diabetic retinopathy can affect people with type 1, type 2, or gestational diabetes. The risk generally increases with the duration of diabetes, particularly when blood sugar, blood pressure, or cholesterol levels are not well controlled.
The Stages of Diabetic Retinopathy
Diabetic retinopathy is broadly divided into nonproliferative and proliferative disease. Doctors may further classify nonproliferative diabetic retinopathy as mild, moderate, or severe based on the amount of retinal damage.
Mild Nonproliferative Diabetic Retinopathy
Mild nonproliferative diabetic retinopathy, or NPDR, is the earliest stage. Small areas in the walls of retinal blood vessels may weaken and bulge. These changes are called microaneurysms.
A person will usually have no noticeable symptoms at this stage. However, the changes can be seen during a dilated retinal examination.
Moderate Nonproliferative Diabetic Retinopathy
As the disease progresses, additional blood vessels may become damaged. Some vessels may swell, leak, or lose their ability to transport blood effectively.
Vision may remain normal, or a person may begin noticing intermittent blurriness or difficulty focusing. These symptoms are not enough to determine the stage, so retinal imaging and examination remain important.
Severe Nonproliferative Diabetic Retinopathy
During severe NPDR, more retinal blood vessels become blocked. This reduces the retina’s blood supply and signals the eye to begin growing new vessels.
Severe NPDR represents a greater risk of progression to proliferative diabetic retinopathy. Even at this stage, symptoms may not accurately reflect how much retinal damage has occurred.
Proliferative Diabetic Retinopathy
Proliferative diabetic retinopathy, or PDR, is the advanced stage. The retina responds to reduced blood flow by growing fragile, abnormal blood vessels.
These vessels can bleed into the vitreous, the gel-like substance inside the eye. Scar tissue may also form and pull on the retina, potentially causing a tractional retinal detachment.
Symptoms can include a sudden increase in floaters, dark streaks, cobweb-like shapes, blurred vision, or major vision loss.
Diabetic Macular Edema Can Occur at Different Stages
Diabetic macular edema, or DME, is swelling in the macula caused by leaking retinal blood vessels. The macula is responsible for detailed central vision needed for reading, recognizing faces, and driving.
DME can develop during different stages of diabetic retinopathy. It is not simply the final stage of the disease.
According to the National Eye Institute, approximately 1 in 15 people with diabetes will develop diabetic macular edema. Symptoms may include blurry or distorted central vision, washed-out colors, or difficulty seeing fine details.
Common Diabetic Retinopathy Symptoms
Early diabetic retinopathy may produce no symptoms. When symptoms do appear, they may include:
- Blurred or fluctuating vision
- Difficulty reading or seeing distant objects
- Dark spots, strings, or cobweb-like floaters
- Blank or shadowed areas in the visual field
- Colors appear faded or washed out
- Difficulty seeing at night
- Partial or significant vision loss
These changes can have many possible causes. An eye examination is needed to determine whether they are related to diabetic retinopathy or another eye condition.
Vision Changes That Need Prompt Attention
Contact an eye doctor promptly if you experience new or worsening vision changes, especially:
- A sudden increase in floaters
- Dark streaks or cobweb-like shapes
- Flashes of light
- A curtain or shadow over part of your vision
- Sudden blurry vision
- Sudden partial or complete vision loss
These symptoms may indicate bleeding inside the eye, retinal detachment, or another urgent retinal condition. Do not wait for the symptoms to clear before seeking guidance.
How Doctors Detect Diabetic Retinopathy
A comprehensive dilated eye exam allows the doctor to examine the retina for leaking blood vessels, abnormal vessel growth, bleeding, swelling, or other damage.
Additional testing may include:
- Optical coherence tomography (OCT) creates detailed cross-sectional images that can reveal retinal swelling or diabetic macular edema.
- Retinal photography: Photographs document retinal changes and help doctors compare findings over time.
- Fluorescein angiography: A fluorescent dye and specialized photography may be used to identify leaking or blocked blood vessels.
- Visual acuity testing: This measures how clearly a person can see at different distances.
Eye pressure testing may be included in a comprehensive examination, but it does not diagnose diabetic retinopathy. The retina must be evaluated directly.
When Should People With Diabetes Have an Eye Exam?
Screening recommendations depend on the type of diabetes, how long a person has had it, pregnancy status, prior retinal findings, and individual medical risk.
The American Academy of Ophthalmology’s guidance on diabetic retinopathy recommends that people with type 1 diabetes begin annual retinal screening 5 years after the onset of diabetes. People with type 2 diabetes should have an eye examination when diabetes is diagnosed because the condition may have been present before diagnosis.
The frequency may change when retinal damage is detected. Some people need examinations more often than once a year. People who are pregnant or planning pregnancy should discuss diabetic eye screening with their diabetes and eye care teams.
Reducing the Risk of Diabetic Vision Loss
Managing diabetes remains an important part of protecting the retina. The American Diabetes Association’s 2026 Standards of Care continue to emphasize evidence-based management of diabetes and related complications.
Helpful steps include:
- Following your recommended blood sugar management plan
- Managing blood pressure and cholesterol
- Taking medications as prescribed
- Avoiding smoking
- Staying physically active when medically appropriate
- Attending recommended medical and eye appointments
- Reporting new vision changes promptly
These steps cannot replace a retinal examination. Someone can have diabetic retinopathy even when their vision still seems clear.
What Happens If Diabetic Retinopathy Is Found?
The next step depends on the disease stage, whether diabetic macular edema is present, and how the condition affects the retina and vision.
Early disease may only require closer monitoring and improved management of diabetes and cardiovascular risk factors. More advanced disease may require injections, laser procedures, surgery, or a combination of treatments.
Treatment decisions belong on an individualized care pathway. Learn more about diabetic retinopathy specialists and treatment at West Texas Eye Associates.
Protect Your Retina Before Symptoms Appear
Understanding the stages and symptoms of diabetic retinopathy is important, but symptoms alone cannot indicate whether your retina is healthy. Regular dilated examinations allow retinal changes to be identified before they cause noticeable vision loss.
West Texas Eye Associates provides comprehensive retina care in Lubbock for people with diabetes and other retinal conditions. If you are due for a diabetic eye examination or have noticed changes in your vision, schedule an eye appointment.