Diabetic Eye Disease: What You Need To Know

Baptist Eye Surgeons • November 9, 2020

November is Diabetic Eye Disease Awareness Month and our team here at Baptist Eye Surgeons wants you to be prepared. Diabetic eye disease isn’t actually one disease, but a term for a broad range of diseases connected with high blood sugar. If you’re diabetic or know someone who is, you’ll want to know what to watch out for and how to help.

To help you better understand diabetic eye disease, we’ll look at:

  • Diabetic retinopathy
  • Glaucoma and diabetes
  • Diabetic macular edema
  • Cataracts and diabetes
  • Diagnosing and treating diabetic eye disease

While it can result in vision loss if left untreated, diabetic eye disease can be caught early through annual comprehensive eye exams. This can help your eye doctor act quickly and prevent any vision loss from getting worse.

Diabetic Retinopathy

Diabetic retinopathy occurs when high blood sugar causes the blood vessels in the retina to swell and eventually become blocked. These blood vessels help keep the eye healthy. However,  they can cause your eyes to try and grow new blood vessels when blocked. Unfortunately, these new blood vessels don’t work properly and tend to leak.

Diabetic retinopathy comes in two types:

  • Early diabetic retinopathy
  • Advanced diabetic retinopathy

Early diabetic retinopathy , also known as NPDR , is the more common of the two. This type of retinopathy results in weakened blood vessels with bulges in smaller blood vessels that leak blood and other fluid into your retina. Large blood vessels, nerve fibers, and the macula of the retina can also swell, resulting in vision loss or blindness.

If left untreated, NPDR can develop into advanced diabetic retinopathy . Also known as proliferative diabetic retinopathy , this form of the disease causes the already damaged blood vessels to close off. While your body will naturally begin to grow new blood vessels, they aren’t nearly as strong as your old ones and can allow fluids to leak into the center of your eye.

The growth of new blood vessels may also cause:

  • Scar tissue to develop 
  • Increased pressure in the eye

The creation of new scar tissue can cause your retina to detach from the back of your eye. Increased eye pressure can result in optic nerve damage that leads to glaucoma.

Glaucoma and Diabetes

Just like the term diabetic eye disease , glaucoma is a blanket term for a group of eye problems that gradually damage the optic nerve. They tend to be caused by the buildup of fluid in the front of your eye. Over time, pressure from the fluid buildup damages your optic nerve.

Common symptoms of glaucoma include:

  • Decreased night vision
  • Poor peripheral vision
  • Increased redness in one or both eyes
  • Eye pain
  • Recurring mild headaches

Adults over the age of 40 are at the highest risk for glaucoma, although you can develop it at any age. Experts believe that there are around 150 million people living with glaucoma who haven’t been diagnosed. Those with diabetes are twice as likely to develop the disease than non-diabetics. Make sure you’re getting regular comprehensive eye exams to treat or catch any problems before they have the chance to develop into something much more serious. For more information concerning glaucoma, you can download our Complete Guide to Glaucoma on our website.

Diabetic Macular Edema

We touched on diabetic macular edema briefly when discussing diabetic retinopathy, but it would be a good idea to take a closer look at the disease. Diabetic macular edema occurs when blood vessels in the eyes swell due to diabetic retinopathy. These are known as microaneurysms and can leak blood and other fluids into the retina. 

As the swelling spreads, it can eventually work its way to the back of the eye and cause the macula to swell, too. Also known as edema , this fluid-caused swelling can lead to serious vision problems such as blurred vision and colors appearing to be faded. If left untreated, diabetic macular edema can eventually lead to blindness.

Cataracts and Diabetes

Cataracts are a condition that affects the lens of the eye. Located behind the pupil, the lens aids the cornea in directing light to the retina. Cataracts interfere with the lens’s ability to help light enter by causing it to become clouded. Cataracts can have many causes, such as getting older, heredity, and past injuries. However, they can also be caused by diabetes.

Cataracts usually become noticeable when you start to detect a constant glare or “filminess” whenever you’re exposed to bright light. Also known as clouding , this dulled vision doesn’t need to be severe to qualify as a cataract. Schedule an appointment with your eye doctor if you notice any amount of clouding in your vision and get it treated immediately.

Diagnosing and Treating Diabetic Eye Disease

The primary symptom of diabetic eye disease is vision loss. This is because other symptoms can’t be diagnosed until some vision loss has occurred. It’s also why getting annual comprehensive eye exams is so important.

During a comprehensive eye exam, your eye doctor will be able to check for:

  • Changes in the macula
  • Damage to nerve tissue
  • Changes in the blood vessels
  • Changes in the lenses

Comprehensive eye exams are essential for the early detection of diabetic eye disease. They allow your eye doctor to come up with a gameplan to treat your condition as well as provide follow-up care that will help prevent further vision loss.

Baptist Eye Surgeons is an ophthalmological practice in Knoxville, TN, and Morristown, TN. Visit our website to meet our doctors and learn more about our specialties, or give us a call at 865-579-3920 for more information or to schedule an appointment .

July 29, 2026
Diabetes affects various parts of the body, including your eyes. Keeping your blood sugar under control is not just good for your health overall, but it also helps protect your eyesight. Over time, high blood sugar can irritate the tiny blood vessels in your eyes and increase your risk of serious eye problems. Knowing how diabetes and eye health are linked can help you identify issues and take measures to protect your sight. How Does Diabetes Affect Eye Health? When blood sugar stays high, it can damage the blood vessels in the retina, which is the part of your eye that senses light and helps you see. Damaged blood vessels might leak fluid, swell, or change how well the retina works. Diabetic eye problems usually develop slowly, so you might not pick up on any changes in your vision until significant damage has occurred. That’s why it’s important for people with diabetes to get regular eye exams, even if their eyesight seems fine. Common Eye Conditions Linked to Diabetes People with diabetes are more likely to have certain eye problems. Finding and treating these issues early can lower the chance of losing vision permanently. 1. Diabetic Retinopathy Diabetic retinopathy is a common eye issue that happens when high blood sugar damages the retinal blood vessels. These damaged vessels may leak fluid, which may cause blurry vision, dark spots, or changes in how you see. In advanced cases, abnormal blood vessel growth can lead to serious problems. If diabetic retinopathy worsens, new abnormal blood vessels can grow, causing serious problems, including vision loss. Getting regular eye exams can help catch these changes early, before they become severe. When fluid is retained in the macula (part of the retina which focuses on sharp central vision), this swelling can make it harder to read, recognize faces, or see fine details clearly. When detected early, treatments can help reduce swelling and protect your eyesight. 3. Cataracts People with diabetes have a higher chance of getting cataracts early. Cataracts occur when the lens in your eye becomes cloudy, which can cause blurry vision, increased sensitivity to glare, and difficulty seeing clearly. While cataracts come with age, having diabetes can make them appear sooner or progress quicker. 4. Glaucoma Diabetes can also raise your risk for glaucoma, which is a group of eye diseases that harm the optic nerve. Glaucoma usually starts without any clear symptoms, but if it is not treated, it can cause permanent vision loss. Routine regular eye exams are important for finding glaucoma early and keeping your eyes healthy Diabetes-related eye problems might not cause symptoms at first. Still, there are some warning signs you should look out for: • Blurry or distorted vision • Difficulty focusing • Dark spots, floaters, or shadows in your sight • Increased sensitivity to glare • Trouble seeing colors clearly • Sudden alterations in vision • Partial or complete loss of vision If you notice sudden vision changes, contact an eye doctor as soon as possible. The Value of Regular Eye Exams for People With Diabetes Getting a full eye exam is one of the best ways to protect your vision if you have diabetes. During the examination, your physician will study your retina, look for symptoms of diabetic eye disease, and track any changes over time. Many eye problems linked to diabetes can be treated more easily if they are found early. Regular checkups help your eye doctor give you advice that fits your own eye health and diabetes care. Protecting Your Eyes When You Have Diabetes Looking after your general health is important for keeping your eyes healthy. Here are some things you can do to protect your vision: • Keeping blood sugar levels under control • Managing blood pressure and cholesterol • Scheduling regular diabetic eye exams • Following your diabetes treatment plan • Eating a balanced diet that promotes eye health • Avoiding smoking, which increases the risk of eye complications Prioritizing Your Vision and Eye Health Diabetes and eye health are closely linked, but you can lower your risk of serious vision problems by taking action early. Getting regular eye exams, making healthy choices, and managing your diabetes all help protect your eyesight. If you have diabetes, seeing your eye doctor regularly can help catch changes early and keep your vision clear for the future. Your eyes are a key part of your health, so make caring for them a priority at every age. 
June 30, 2026
Night vision problems can make everyday activities like driving at dusk, walking in poorly lit places, or adjusting to indoor lighting harder and sometimes unsafe. Trouble seeing in low light, called nyctalopia, is not a disease itself but a sign that something else may be affecting your eyes. Learning what causes night vision problems and when to get help is important for keeping your vision healthy. What Are Night Vision Problems? Night vision problems mean it is hard to see clearly in low light or darkness. Some people notice their eyes take longer to adjust when going from bright to dim places. Others may have trouble with glare from headlights, seeing less contrast, or things just looking dimmer at night. Mild changes in night vision can happen as you get older, but if your symptoms keep getting worse or do not go away, you should pay attention to them. Common Causes of Night Vision Difficulties There are several potential causes of night vision problems. Night vision problems can have many causes, from getting older to certain eye conditions, such as lens problems, leading to blurred vision and increased sensitivity to glare. They are one of the most common causes of poor night vision, especially in older adults. 1. Cataracts Cataracts cause clouding of the eye’s natural lens, leading to blurred vision and increased sensitivity to glare. They are one of the most common causes of poor night vision, especially in older adults. 2. Vitamin A Deficiency Vitamin A is important for keeping your retina healthy. If you do not get enough vitamin A, your eyes may have trouble adjusting to darkness, which can lead to night blindness. 3. Glaucoma Some types of glaucoma can affect your side vision and make it harder to see differences between light and dark. As the optic nerve gets damaged, seeing in low light can become more difficult. 4. Retinitis Pigmentosa This inherited eye condition slowly affects your ability to see at night and to the sides. Early signs often include trouble seeing in the dark. 5. Diabetes-Related Eye Disease Diabetic retinopathy can harm the blood vessels in your retina, which may cause blurry vision and make it harder to see at night. 6. Aging and Pupil Changes As people get older, their pupils do not react to light changes as quickly, and the retina becomes less sensitive. This naturally makes night vision worse over time. Symptoms to Watch For Night vision problems often develop slowly. Some common signs are: Difficulty seeing in low light or darkness Trouble driving at night due to glare from headlights Longer adjustment time when moving between light and dark environments Reduced contrast or clarity in dim settings Frequent squinting or eye strain in low light If these symptoms start to affect your daily life, it is a good idea to get a full eye check-up. When to See an Eye Doctor You should see an eye doctor if you notice new night vision problems, if they are getting worse, or if you have other changes in your vision. The doctor can run tests to find out what is causing the problem and suggest the right treatment. A full eye exam might include checking your retina, testing your field of vision, and taking images to look at your eye health. Finding problems early is very important for conditions like glaucoma, diabetic eye disease, and retinal disorders, because early treatment can help protect your vision. Protecting Your Night Vision Not all causes of night vision loss can be prevented, but taking care of your eyes can lower your risk and help you see better. Some helpful steps are: Scheduling regular eye exams Handling chronic health conditions like diabetes Eating a diet rich in vitamin A and antioxidants Wearing proper corrective lenses if prescribed Avoiding driving with untreated vision changes Prioritizing Your Eye Health Night vision problems can be an early sign of eye disease. Since many eye problems develop slowly, having regular eye exams is one of the best ways to catch changes early and keep your vision healthy for the long term. If you have trouble seeing at night or notice any changes in your vision, making an appointment for an eye exam can help keep your eyes healthy and your vision clear in all types of light.
Understanding Eye Pressure: What It Means for Glaucoma Risk
June 1, 2026
Understanding eye pressure, or intraocular pressure (IOP), is important for protecting your vision. IOP considerably affects the development and progression...