Anti-VEGF Injections
What Are Anti-VEGF Injections?
These injections use special medications that block a protein called vascular endothelial growth factor (VEGF), which can cause damage when too much is present in the eye. Administered by retina specialists, this treatment is a mainstay for several conditions that threaten vision.
VEGF is a natural protein your body uses to create new blood vessels. In certain eye diseases, however, the eye produces too much VEGF, leading to the growth of fragile, leaky blood vessels that damage the retina and cause vision loss. Anti-VEGF medications work by intercepting this excess VEGF, preventing it from causing further harm and allowing the eye to heal.
Several effective anti-VEGF medications are available, each designed to protect your vision. Your retina specialist will recommend the best option based on your diagnosis, overall health, and response to treatment.
- Avastin (bevacizumab) - Widely used 'off-label' for its proven effectiveness and affordability.
- Lucentis (ranibizumab) - FDA-approved specifically for various retinal conditions.
- Eylea (aflibercept) - A strong medication that may allow for longer intervals between injections.
- Vabysmo (faricimab) - A newer medication that targets two different pathways and can extend time between treatments.
- Susvimo - A small, surgically-placed port that delivers a continuous supply of medication over several months.
Unlike eye drops that treat the surface or pills that affect your whole body, anti-VEGF injections deliver concentrated medicine directly to the back of the eye where it is needed most. This targeted approach is more effective and has fewer side effects throughout the body. While older treatments like thermal laser created permanent scars to seal leaks, anti-VEGF therapy can reduce swelling and even reverse some damage, making it the preferred choice for many retinal diseases.
This treatment is especially valuable for patients with retinal diseases caused or worsened by abnormal blood vessel growth or swelling. Your retina specialist will perform a detailed eye exam, often including specialized imaging, to determine if you are a good candidate and to create a personalized treatment plan.
Conditions Treated with Anti-VEGF Injections
These injections are the standard of care for several serious eye conditions that can cause significant vision loss or blindness. They are most effective when started early, before irreversible damage occurs.
A leading cause of severe vision loss in people over 50, wet AMD occurs when abnormal blood vessels grow under the macula and leak fluid, causing rapid loss of central vision. With regular anti-VEGF treatment, studies show that about 90% of patients maintain their vision, and 30-40% may see some improvement. Without treatment, most people lose significant vision within two years.
Diabetic eye disease is the leading cause of blindness in working-age adults. High blood sugar damages the retina’s tiny blood vessels, causing them to leak fluid (diabetic macular edema) or grow abnormally. Anti-VEGF injections reduce this swelling and can prevent the growth of new harmful vessels, helping people with diabetes maintain their quality of life.
This condition occurs when a vein in the retina becomes blocked, similar to a stroke in the eye, causing blood and fluid to leak and lead to swelling and vision loss. Anti-VEGF injections are highly effective at reducing the swelling and can significantly improve vision, especially when treatment begins soon after the blockage occurs.
In people with severe nearsightedness (high myopia), abnormal blood vessels can grow under the retina, causing sudden central vision loss. Anti-VEGF injections are highly effective for this condition and often require fewer treatments compared to other retinal diseases.
Anti-VEGF injections may also be used to treat macular edema from other causes, such as inflammation (uveitis) or following retinal surgery. Your retina specialist will evaluate your specific situation to determine if this therapy is the right choice for you.
The Procedure for Anti-VEGF Injections
The injection is a quick and common in-office procedure designed to be as safe and comfortable as possible. The entire process, including preparation and post-injection checks, typically takes about 15-20 minutes.
Before the procedure, your eye will be examined, and your vision and eye pressure will be checked. The medical team will clean the area around your eye with an antiseptic solution and apply powerful numbing drops to ensure comfort. It is best to avoid eye makeup on the day of your treatment.
A small device may be used to gently hold your eyelids open so you don’t have to worry about blinking. The injection is given with a very thin needle into the white part of your eye (the sclera). Most patients report feeling only a brief moment of pressure or a slight pinch, and the injection itself is over in just a few seconds.
Immediately after, your vision may be blurry, and you might see small spots or floaters, which usually disappear within a day or two. Your eye may feel slightly scratchy or irritated. You should plan to have someone drive you home. Most people can return to normal, light activities the next day, but you should avoid swimming or hot tubs for about a week to reduce infection risk.
You will typically have a follow-up appointment in 4-8 weeks to monitor your eye's response to the treatment. These visits are crucial for determining the timing of your next injection and ensuring the best possible long-term outcome. Sticking to your follow-up schedule is the most important factor in preserving your vision.
It is completely normal to feel nervous about eye injections. Most patients are surprised by how quick and comfortable the procedure is. Your care team is experienced in helping patients feel at ease, so please share any concerns you have. Knowing what to expect often makes subsequent treatments much less stressful.
Benefits and Risks of Anti-VEGF Injections
For most patients, the benefits of preserving vision far outweigh the potential risks, especially since untreated retinal disease often leads to permanent vision loss. Your doctor will discuss these with you in detail.
The primary benefit is preventing blindness and preserving the vision needed for daily activities like reading, driving, and recognizing faces. Many patients maintain their independence and report feeling less anxious about their eye condition once treatment begins to work. Some patients even experience significant vision improvement.
Most side effects are mild, temporary, and resolve within a day or two. These can include eye redness, mild pain or a scratchy feeling, watery eyes, or seeing floaters. Temporary increases in eye pressure may also occur and will be monitored by your doctor.
Serious complications are very uncommon, occurring in less than 1 in 1,000 injections. The most significant risks include a severe infection inside the eye (endophthalmitis), retinal detachment, or cataract formation. Your medical team takes extensive precautions, such as using a sterile technique, to minimize these risks.
Frequently Asked Questions About Anti-VEGF Injections
Here are answers to some of the most common questions patients have about this treatment. We encourage you to discuss any other questions you may have with your eye care team.
The frequency depends on your condition and how your eye responds. Most patients start with monthly injections for the first few months. As your condition stabilizes, the time between treatments may be extended to every 6, 8, or even 12 weeks.
No. The numbing drops are very effective at preventing pain. Most patients feel only a brief, mild pressure. The anxiety before the first injection is often much worse than the procedure itself.
It is recommended that you have someone drive you home. Your vision may be blurry for several hours from the procedure and the dilating drops used for your exam. Most patients can safely drive by the next day.
If you don't respond well to one medication, your doctor may switch to a different one, as some people respond better to a specific drug. In some cases, other treatments like steroids or laser therapy may be combined with or used as an alternative to anti-VEGF injections.
Most conditions treated with anti-VEGF are chronic and require long-term management. However, many patients can reduce the frequency of injections over time. Some may even be able to stop treatment for periods, with continued monitoring to ensure the disease remains inactive.
These injections are best at stopping further vision loss, but some patients do regain recently lost vision. The treatment is most effective when started before permanent scarring has occurred. Stabilizing your current vision is a crucial goal for maintaining your quality of life.
Managing your overall health is critical. Lifestyle changes can support your eye health and improve treatment outcomes.
- Control underlying conditions like diabetes, high blood pressure, and high cholesterol.
- Eat a diet rich in leafy green vegetables, colorful fruits, and fish with omega-3 fatty acids.
- Stop smoking, as smoking is a major risk factor for worsening many eye conditions.
- Protect your eyes from UV light by wearing sunglasses outdoors.
Contact your eye doctor immediately if you experience severe or worsening eye pain, a sudden decrease in vision, increasing redness or discharge from your eye, or see new flashes of light or a curtain-like shadow in your vision. While serious problems are rare, prompt attention is critical.
Costs vary depending on the medication used and your insurance plan. Most insurance plans, including Medicare, cover anti-VEGF injections for approved conditions. Your doctor's office can help you understand your benefits and any potential out-of-pocket costs.
Taking Care of Your Eyes
Anti-VEGF injections are one of the most significant advances in modern eye care, offering hope and stability to millions of patients. By staying committed to your treatment schedule and working closely with your retina specialist, you are taking the best possible step to protect your precious gift of sight for years to come.