Central Retinal Vein Occlusion (CRVO)

Injections directly into your eye are the most effective treatment for the macular swelling caused by CRVO and represent the cornerstone of modern CRVO treatment. These procedures are performed quickly and comfortably in our office using ultra-fine needles with numbing drops for your safety and comfort.

• Anti-VEGF medications such as bevacizumab (Avastin), ranibizumab (Lucentis), aflibercept (including 8 mg formulation), and faricimab reduce blood vessel leakage and improve vision in the majority of patients
• Steroid medications such as Ozurdex implants or triamcinolone injections for cases with inflammatory components or that do not respond well to anti-VEGF treatments; steroids can raise eye pressure and accelerate cataract, so we monitor closely
• Combination therapy approaches when appropriate, using different medications in sequence or alternating treatments based on your individual response patterns
• Customized treatment schedules based on OCT findings, how your vision responds, and your specific patient factors
• All injection procedures performed under sterile conditions with careful antiseptic preparation and post-injection monitoring

Our retina specialists use advanced laser technology to treat specific complications of CRVO and prevent further vision loss, with techniques refined over decades of clinical experience. Laser serves important roles but is not the first choice for treating macular swelling.

• Panretinal photocoagulation (PRP) to treat dangerous new blood vessels in the retina, iris, or drainage angle that can cause severe pressure increases and vision-threatening glaucoma
• Targeted laser treatment for specific areas of abnormal blood vessels or small aneurysms in carefully selected cases
• Standard care is close observation with prompt PRP once neovascularization is detected; prophylactic PRP is reserved for select situations such as extensive ischemia with unreliable follow-up
• Grid or focal macular laser is generally not used in CRVO since anti-VEGF injections have proven much more effective for macular swelling

Surgery becomes necessary when complications develop that cannot be managed with injections or laser treatment alone. Our experienced vitreoretinal surgeons perform these delicate microsurgical procedures to restore anatomy and function when appropriate.

• Pars plana vitrectomy surgery to remove persistent blood in the eye gel that prevents visual recovery or adequate examination of the retina
• Combined vitrectomy with membrane peeling for scar tissue or abnormal pulling on the macula that complicates recovery
• Surgical management of retinal detachment caused by scar tissue in advanced cases with severe blood flow blockage
• Specialized glaucoma surgical procedures when dangerous new blood vessels cause severe pressure increases, often requiring coordination with glaucoma specialists
• Advanced surgical techniques for complex cases with multiple complications that require comprehensive treatment

Comprehensive care addresses the underlying blood vessel risk factors that contributed to your CRVO to protect your other eye, prevent the condition from happening again, and optimize your overall heart and blood vessel health through collaboration with your primary care doctor and specialists.

• Blood pressure control with individualized target goals based on your specific health conditions through medication adjustment and lifestyle changes
• Diabetes management with individualized hemoglobin A1c targets based on your age and health conditions through medication and lifestyle optimization
• Cholesterol management and statin medication therapy when indicated for heart disease risk reduction
• Complete smoking cessation programs and counseling with proven strategies for tobacco independence
• Sleep apnea evaluation and treatment when symptoms or risk factors are present
• Blood clotting disorder workup in younger patients or those with repeated events
• Regular heart and blood vessel monitoring and specialist referrals as needed

Vision recovery is highly variable and depends on the extent of retinal damage and macular involvement. Many patients experience significant vision improvement with prompt treatment, especially those with non-ischemic CRVO who may achieve near-normal vision if treated early, but complete return to pre-CRVO vision is not always possible due to underlying retinal damage. The earlier treatment begins and the more consistently you follow your treatment plan, the better your chances for meaningful recovery.

CRVO is sometimes called an 'eye stroke,' but it is different from a retinal artery occlusion. CRVO blocks blood flowing out of the retina causing gradual vision loss with bleeding and swelling, while retinal artery occlusion blocks blood flowing into the retina causing sudden severe vision loss with retinal whitening. Both are serious but have different causes, treatments, and outcomes.

CRVO usually affects only one eye at a time, but having CRVO does increase your risk of developing it in your other eye to about 5–10% over several years because the same health conditions that caused the first CRVO are still present. This makes blood pressure control, glucose management, and regular eye examinations essential for protecting vision in both eyes.

The duration of injection therapy varies greatly between patients. Some achieve stable improvement allowing extended intervals between injections or treatment discontinuation, while others require ongoing therapy for years. Many patients find that they need fewer injections over time as their condition stabilizes, with decisions based on individual response patterns and disease characteristics.

Most patients are surprised by how comfortable eye injections are and report only mild discomfort during injections performed with numbing drops and careful technique. We use numbing drops and antiseptic preparation to minimize discomfort. Most people describe feeling pressure or a brief pinch rather than significant pain, and the actual injection takes only seconds to complete.

Follow-up schedules are individualized but typically begin with monthly visits during active treatment phases, potentially extending to every 2–3 months as your eye stabilizes, with urgent appointments always available for new symptoms or complications. Initially, you will likely need monthly visits for the first few months to monitor your condition closely and provide injections.

Laser treatment is very important for preventing and treating the abnormal new blood vessels that can develop after CRVO, but laser photocoagulation is not effective for treating macular swelling caused by CRVO. Eye injections with anti-VEGF medications have proven superior and are the standard of care for reducing macular swelling and improving vision.

Most normal activities can be continued safely, but patients should avoid heavy lifting immediately after injections, follow driving restrictions based on visual function, and maintain regular exercise as approved by their physicians for heart and blood vessel health. Most activities that were safe before CRVO remain safe afterward.

While sudden stress or straining may rarely trigger CRVO in people who are already at risk, chronic risk factors like high blood pressure and diabetes are far more important than specific activities. Long-term heart and blood vessel health management through lifestyle changes and medication compliance is more critical than avoiding particular activities.

Warning signs include sudden worsening vision, new floaters or flashing lights, increasing distortion or blind spots, or eye pain, all requiring immediate evaluation. Contact our office immediately if you experience any of these symptoms. Gradual changes should be reported at regular appointments for assessment and potential treatment adjustment.

Most insurance plans cover medically necessary CRVO treatments including injections and laser therapy, and our staff works closely with insurance companies and provides prior authorization support to ensure treatment accessibility and minimize patient financial burden. We help navigate insurance requirements to ensure you can access needed treatments.

Research continues into longer-acting medications, combination therapies, and novel drug delivery systems, with clinical trials occasionally available for eligible patients. Our retina specialists stay current with emerging treatments to offer the latest evidence-based care and can discuss whether you might be a candidate for clinical trials of new treatments.