Understanding Retinal Vascular Occlusions
Types of Retinal Vascular Occlusions
This section explains the main forms of vessel blockages that can affect the retina and how they differ.
RVO happens when a vein that drains blood from the retina becomes blocked, causing fluid buildup, swelling, and sometimes bleeding.
- Central Retinal Vein Occlusion affects the main retinal vein and can damage large areas of retina.
- Branch Retinal Vein Occlusion blocks a smaller branch vein and usually harms only part of the retina.
- Hemiretinal Vein Occlusion involves about half of the retinal field and is less common.
RAO is less common but often more severe because arteries carry oxygen-rich blood. Patients usually notice sudden, painless vision loss.
- Central Retinal Artery Occlusion blocks the main retinal artery and can cause major vision loss if not treated right away.
- Branch Retinal Artery Occlusion blocks a smaller branch artery and may allow some recovery.
- Ophthalmic Artery Occlusion is rare, affecting the main artery to the eye and leading to severe vision loss.
If left unmanaged, these blockages can lead to serious problems that threaten sight.
- Macular edema causes central vision to blur or distort.
- Neovascularization creates fragile new vessels that can bleed.
- Vitreous hemorrhage clouds vision with blood inside the eye.
- Neovascular glaucoma raises eye pressure and can be painful.
- Retinal detachment separates the retina from its support tissue, risking permanent vision loss.
Recognizing Symptoms
Symptoms vary based on the type and severity of the blockage, but sudden changes in vision should never be ignored.
Fluid buildup in the macula can make images appear hazy or wavy.
CRVO or CRAO can cause rapid vision drop within hours or minutes.
Bleeding or fluid leakage may create floating specks or lines in your field of view.
Some patients feel pressure or ache in the affected eye, especially if swelling or new vessel growth occurs.
A sudden shadow moving over part of the vision is often reported with arterial blockages.
Causes and Contributing Factors
Understanding what leads to retinal vascular occlusions helps patients and doctors manage risks more effectively.
Clots or tiny emboli can block veins or arteries inside the retina.
A hardened artery can press on a neighboring vein, leading to a blockage.
High blood pressure, diabetes, and high cholesterol weaken blood vessels over time.
Elevated eye pressure may contribute to the formation of occlusions.
People over 50 have less flexible vessels, making blockages more likely.
While not all occlusions can be prevented, healthy habits lower your risk.
- Manage blood pressure, blood sugar, and cholesterol through regular medical care.
- Eat a balanced diet rich in fruits, vegetables, lean proteins, and whole grains.
- Exercise regularly to support circulation and heart health.
- Avoid smoking because tobacco damages blood vessels.
- Schedule routine eye exams to catch changes early.
Diagnosis and Evaluation
Our retina team uses several tests to confirm a blockage and plan treatment.
Eye drops widen the pupils so the retina can be inspected for swelling, bleeding, or blocked vessels.
This scan provides cross-section images that reveal fluid buildup or retinal thickening.
A fluorescent dye travels through retinal vessels, showing areas of blockage or leakage on a special camera.
High-resolution photos track retinal changes over time and guide treatment.
Brain imaging or carotid artery ultrasound may be ordered to check for stroke-related risks.
Treatment Options
Treatment focuses on controlling complications, restoring circulation, and managing underlying health conditions.
Medicines such as aflibercept, bevacizumab, and ranibizumab reduce swelling by blocking a protein that causes abnormal vessel growth.
When anti-VEGF therapy is not enough, steroids can lower inflammation and fluid but require careful monitoring of eye pressure.
Panretinal photocoagulation creates tiny burns in oxygen-starved areas to limit new vessel growth and bleeding.
In severe cases with persistent bleeding or detachment, removing the gel-like vitreous helps clear blood and stabilize the retina.
Controlling blood pressure, diabetes, and cholesterol supports eye health and prevents further blockages.
When to Seek Medical Attention
Prompt evaluation can save vision when symptoms appear suddenly or worsen.
Any rapid drop in sight, partial or complete, needs immediate care.
A shadow sweeping across the field of view can signal an arterial blockage.
Noticeable changes in clarity, especially with other symptoms, should be checked right away.
Painful or uncomfortable feelings in the eye can point to complications that require urgent attention.
Partnering With Our Retina Team
We are committed to early detection, personalized treatment, and ongoing monitoring to protect your sight. If you notice changes in vision or have risk factors for retinal vascular occlusions, reach out to our clinic for expert, compassionate care.
I've been seeing Dr. for years. She went above and beyond during a retina issue, including emergency visits and checking in via text. Truly caring and professional.
N R
Our family has received excellent care at Dulles Eye Associates. Dr. Nasrullah performed LASIK on four family members, and all doctors including Dr. Najafi and Dr. Dar are professional and skilled. Highly recommend.
Sue Dow
Wonderful experience! Excellent staff all around. 100% recommend! Thank you Dr. Nasrullah and team!
Khaek Beyersdorf
I had an excellent experience at Advanced Eye Care Center located on West Hanover Ave. They were incredibly efficient in fitting me in on short notice, and I left feeling so much relief. The doctor was thorough and compassionate, and the entire staff (from the front desk to the exam room) was friendly, welcoming, and professional. It’s refreshing to find a healthcare office that combines speed, care, and kindness so seamlessly. I highly recommend this office to anyone in need of eye care!
Irene Gatti
2nd visit to Dulles Eye Associates at Lansdowne. Front desk welcoming, tech Nelofar kind & explains exams. Dr. Simon informative, answers all questions. Highly recommend.
Debb W.