Anyone with diabetes is at risk for developing diabetic retinopathy, an eye condition that damages the retina and can cause vision impairment. The longer you live with diabetes, the more likely it is that you will experience complications from this disease.
The retina allows your vision to function correctly. It is a light-sensitive structure on the inner back wall of the eye. When light enters your eye, an image of what is in your field of vision appears on the retina. It transmits these light signals through the optic nerve to the brain, which then translates them into images that your brain can understand.
A network of tiny blood vessels nurture the retina, allowing it to function properly. However, when a diabetic has uncontrolled blood pressure or blood sugar levels, small blood vessels throughout the body may be damaged, including the vessels within the eye. If the retina does not receive enough blood flow, the decline in its function can lead to vision loss. In addition, enlarged or weakened blood vessels can leak small amounts of blood into the eye, blocking your vision. In more advanced cases, abnormal blood vessels can form within the eye, causing additional fluid leakage as well as the formation of scar tissue, which can result in significant vision loss or even permanent blindness.
In the early stages of diabetic retinopathy, people often don't notice any changes in vision because the symptoms of the disease are often silent.
When diabetic retinopathy advances into later stages, it can affect your vision in a several ways:
Your vision may appear blurry or distorted
You may notice flashes or floaters in your field of vision
Your night vision may worsen, or you may begin to see colors less vividly
You may see dark spots or unexpected blank areas in your vision
If you have diabetes and have experienced any of these vision problems, make an appointment with your eye doctor for an eye health assessment.
The eye doctor may also perform a test known as optical coherence tomography, which takes images of the retina to assess its thickness, which may indicate eye diseases related to diabetes.
Another test that may be administered is fluorescein angiography. This procedure helps the eye doctor view the blood vessels in your retina. During a fluorescein angiography, the doctor will inject dye into your arm, which travels through blood vessels to your eyes. The dye appears bright yellow, making it easier for the doctor to view the activity of the tiny blood vessels. Using a specialized camera, the doctor takes images of your eyes to see if the blood vessel activity shows signs of diabetic retinopathy.
In early stages of the disease, managing your diabetes may be enough to prevent the progression of diabetic retinopathy. However, it is important to see your eye doctor regularly for dilated eye exams to monitor the eye condition for signs of change.
When diabetic retinopathy begins to impair your vision, preventive treatment may not be sufficient. At this stage, more advanced diabetic retinopathy treatment may be critical to preserve your remaining vision. A medication known as anti-VEGF therapy can be injected into the eye after it is numbed and can stop blood vessels from leaking within the eye. Laser treatments can be utilized to seal leaky blood vessels or minimize the presence of abnormal blood vessels. If scar tissue or blood builds inside the eye, it can be removed during surgery to temporarily improve vision.
After you've been diagnosed with diabetes, it is imperative that you take any medication prescribed by your doctor to help keep your blood pressure and blood sugar levels in a healthy range. See an eye doctor at least once a year for a dilated eye exam to keep tabs on your eye health, allowing them to catch the early stages of diabetic retinopathy before your vision is permanently damaged.
Good nutrition and regular physical activity can help to keep your blood sugar levels in a healthy range for the prevention of eye conditions. Eating a healthy diet and getting regular exercise can also lower your risk of diabetic retinopathy or can prevent existing retinopathy from developing into later stages.
Diabetic retinopathy can lead to significant vision loss and permanent blindness, but these complications of the disease can be prevented by practicing self-care and following the advice of your eye doctor.