Neovascular Glaucoma and Diabetes: What You Need to Know
Understanding Neovascular Glaucoma
Neovascular glaucoma is a form of glaucoma caused by new, abnormal blood vessels growing in the eye. It is especially important for people with diabetes to be aware of this condition since diabetes can significantly increase its risk.
Glaucoma refers to a group of diseases that damage the optic nerve, often due to high pressure inside the eye. This pressure damages sensitive nerve fibers and, over time, can lead to vision loss. With early diagnosis and care by our ophthalmologists, most people can slow or prevent further vision loss.
“Neovascular” describes new blood vessels forming where they do not belong. In neovascular glaucoma, these abnormal vessels grow on the iris and in the eye's drainage area, blocking fluid from draining and raising eye pressure.
High blood sugar caused by diabetes can damage the retina’s blood vessels. To compensate, the eye produces signals that make new, fragile vessels grow. In people with advanced diabetic retinopathy, these new vessels can move toward the front of the eye and trigger neovascular glaucoma.
Neovascular glaucoma can cause a rapid rise in eye pressure, which damages the optic nerve and may cause permanent vision loss. Prompt treatment is critical to preserving sight.
The disease usually begins with new vessel growth on the retina. Over time, these abnormal vessels extend to the iris and clog drainage channels, leading to dangerously high eye pressure.
Causes and Risk Factors
Understanding what contributes to neovascular glaucoma helps you lower your risk and protect your eyes.
People with proliferative diabetic retinopathy are the most at risk. This condition causes abnormal blood vessel growth in the retina, which can spread to other parts of the eye and block fluid flow.
Frequent high blood sugar levels increase the risk of developing eye complications. Consistently keeping diabetes well controlled can help protect your eye health and overall well-being.
Having diabetes for a decade or longer increases the chances of developing neovascular glaucoma. This is why regular eye exams are especially important after several years of living with diabetes.
High blood pressure, high cholesterol, and smoking can worsen blood vessel damage in the eyes. These health issues work together to raise your risk, so managing them is part of strong preventive care.
Previous trauma, inflammation, or eye surgery can contribute to abnormal blood vessel growth and increase glaucoma risk. Discuss your full medical and eye history with your doctor.
Certain ethnic backgrounds and family histories increase risk for diabetic eye complications, including neovascular glaucoma. Talk to our eye care team if close family members have had serious eye diseases.
Recognizing Key Symptoms
Neovascular glaucoma can progress quickly. Being aware of symptoms can help you get prompt care and protect your vision.
This condition often causes deep, aching pain in the eye along with redness. If you experience this combination, especially with a history of diabetes, contact ReFocus Eye Health Penndel right away.
Rising pressure can blur your vision or make colors look washed out. Sudden changes in sight should be evaluated as soon as possible.
Rainbow halos or bright rings around lights, especially at night, can signal high eye pressure. This symptom is a warning sign not to ignore.
Headaches located behind or around the eyes may worsen as glaucoma progresses. Let your eye doctor know about any new or worsening headaches.
Increased tearing or watery eyes can also happen as a response to eye pain or high pressure.
Photophobia, or discomfort in bright lighting, sometimes occurs with neovascular glaucoma due to inflammation and pressure changes.
How Neovascular Glaucoma Is Diagnosed
Our ophthalmologists at ReFocus Eye Health Penndel use advanced technology and thorough exams to diagnose neovascular glaucoma as early as possible.
A tonometer is used to check the pressure inside the eye. High pressure readings are a key indicator of glaucoma and guide treatment choices.
Using a slit lamp, our eye care team can see the front structures in your eye and detect abnormal vessel growth. This painless exam only takes a few minutes during your visit.
OCT imaging gives a detailed, cross-sectional picture of the retina and optic nerve. It helps us spot fluid, swelling, or new vessels before changes become visible during a regular exam.
This test uses a special lens to view fluid drainage angles in the eye, helping confirm whether abnormal vessels are blocking fluid outflow and raising eye pressure.
By injecting a dye into the arm and taking special pictures, fluorescein angiography highlights retinal blood flow and new vessel growth for more precise diagnosis.
An automated test that checks for peripheral vision loss, allowing us to track the effects of glaucoma on your field of vision over time.
Treatment: Protecting Your Vision
Treatment for neovascular glaucoma usually involves more than one approach. The eye care team at ReFocus Eye Health Penndel will develop a personalized plan to control eye pressure and prevent further vision loss.
Prescription eye drops or oral medications may be used to lower eye pressure. These medicines must be taken exactly as prescribed to work effectively.
Anti-VEGF medications, like Avastin or Eylea, are injected directly into the eye to slow or stop the growth of abnormal blood vessels. Your doctor will talk to you about the number and timing of injections needed.
Laser therapies such as panretinal photocoagulation target abnormal blood vessels and help prevent new growth. Laser can also sometimes open fluid drainage channels, lowering eye pressure.
If drops or laser can’t fully control pressure, surgery may be required. Surgeries like trabeculectomy or implanting a drainage shunt create new ways for fluid to leave the eye and lower pressure safely.
For severe cases, treatments that partially destroy the part of the eye producing fluid (the ciliary body) can decrease fluid buildup and lower eye pressure.
Most patients require a combination of medications, laser, and sometimes surgery for best results. Our ophthalmologists will review your options and explain the benefits and risks of each step.
Prevention and Ongoing Care
Taking proactive steps can reduce your risk of neovascular glaucoma. Our team provides support and education to help you make eye health a priority.
Annual dilated exams let us catch changes early, when treatment is most effective. If you have advanced diabetic retinopathy or other risks, you may need more frequent visits.
Keeping blood sugar within target levels is one of the best ways to prevent new blood vessel growth in the eyes. Work closely with your medical team to maintain healthy numbers and check your levels regularly.
Nutritious food, regular physical activity, and avoiding tobacco all support strong eye health. A diet rich in leafy greens and omega-3s can help keep the retina healthy.
Taking medications as prescribed and making lifestyle changes to keep blood pressure and cholesterol in range will also protect your eyes from diabetic complications.
Stopping tobacco use lowers your risk of serious eye diseases. Our practice can direct you to local support programs if you are ready to quit.
If you have dry eyes, using artificial tears regularly can help with comfort and visual clarity during exams, making it easier for us to spot early changes.
Frequently Asked Questions
Our patients in Penndel and the Greater Philadelphia Metropolitan Area often have important questions about neovascular glaucoma. Here are clear answers to help guide your next steps.
People with long-term diabetes, especially those with proliferative diabetic retinopathy or who have struggled with blood sugar control, are at greatest risk. Conditions like high blood pressure, kidney disease, and high cholesterol add further risk. Early and regular eye care makes all the difference.
Yes. Starting treatment right away can control rising pressure and prevent further vision loss. Patients treated soon after diagnosis have the best chances of keeping useful sight.
Without prompt care, this condition can cause permanent optic nerve damage, severe vision loss, pain, and, in rare cases, loss of the eye. Early treatment is the key to protecting your vision.
All treatments have possible side effects. For example, eye drops can cause mild stinging or redness, injections may cause temporary discomfort or floaters, and surgery may have a risk of infection or bleeding. Our team will review these with you in detail and monitor your progress closely.
It is best to start treatment as soon as possible, ideally within days to a few weeks after diagnosis. Waiting can result in permanent vision changes that cannot be reversed.
Plan ahead by arranging a ride home, since your vision may be blurred for a few hours. Avoid contact lenses on the day of your injection. Follow any specific cleaning steps your eye doctor gives you, and tell your doctor about all medications, especially blood thinners.
Yes, abnormal vessels can bleed into the clear gel (vitreous) inside your eye, causing floaters or sudden cloudy vision. If this happens, call ReFocus Eye Health Penndel or your eye care provider right away.
We can connect you with local and regional resources including:
- Low vision rehabilitation programs
- Occupational therapy to help with daily tasks
- Support groups and counseling
- Magnifiers and digital tools for reading
Take the Next Step Toward Eye Health
Protecting your vision starts with knowledge and early action. If you have diabetes, regular eye exams at ReFocus Eye Health Penndel are your best defense against serious conditions like neovascular glaucoma. Our team is here to answer your questions, offer expert care, and support you every step of the way.
Dr. Martinez is a really great physician. Very professional, thorough and willing to answer any questions.
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Dr. Amin excellent. Very knowledgeable, professional. Great personality.
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I see Dr. Soll. He is very knowledgeable, and I trust what he tells me. I recommend him.
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Dr. Soll caring, thorough ophthalmologist. Assistant Brooke kind, makes you comfortable. Dionne friendly receptionist, makes you welcome.
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First visit with Dr. Soll. My doctor of 30 yrs retired, was apprehensive. Everyone was great! Dr. Soll thorough, explained everything. Very pleased with my new doctor.
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