Wet macular degeneration is when abnormal blood vessels grow under the macula and leak fluid or blood

In wet macular degeneration, the eye develops new blood vessels in the layer beneath the retina, in an area called the choroid. These vessels are fragile and abnormal—they leak fluid and blood into the macula, the part of the retina responsible for sharp central vision. This leakage causes the macula to swell and distort, which damages the light-sensitive cells and leads to vision loss that can happen quickly, sometimes over days or weeks.

Wet macular degeneration accounts for about 10 to 15 percent of all age-related macular degeneration cases, but it causes the majority of severe vision loss from the disease. The leaking fluid creates a kind of scar tissue that, if left untreated, can permanently destroy the macula. The good news is that treatments exist to slow or stop the leaking, and starting treatment early makes a real difference in how much vision you keep.

Key Takeaways

  • Wet macular degeneration involves abnormal blood vessels that leak fluid under the macula, causing swelling and vision loss that can develop rapidly.
  • The condition damages the macula faster than dry macular degeneration and requires treatment to prevent permanent vision loss.
  • Anti-VEGF injections are the main treatment and work by stopping the growth of the abnormal blood vessels.
  • Early detection through regular eye exams and prompt treatment significantly improve the chances of preserving vision.
  • Vision loss from wet macular degeneration may be reversible in early stages, but becomes permanent if the macula is scarred.

How abnormal blood vessels form and why they leak

The eye normally has a precise network of blood vessels that deliver oxygen and nutrients to the retina. In wet macular degeneration, the eye produces too much of a protein called vascular endothelial growth factor (VEGF), which signals the body to grow new blood vessels. This happens as a response to aging, inflammation, or reduced oxygen in the retinal tissue, but the new vessels that form are structurally weak.

These abnormal vessels have thin, permeable walls that allow fluid and blood to seep out into the space between the retina and the choroid. The fluid accumulates under the macula, lifting it up and distorting its shape. This distortion prevents light from focusing properly on the light-sensitive cells, which is why vision becomes blurry, wavy, or has dark spots. The longer the fluid sits there, the more damage occurs to the cells underneath.

The difference between wet and dry macular degeneration

Dry macular degeneration, the more common form, develops slowly over years as the light-sensitive cells gradually break down. Wet macular degeneration is less common but progresses much faster—vision can decline noticeably in a matter of weeks. The speed of change is the critical difference: dry macular degeneration gives you more time to adapt and seek care, while wet macular degeneration demands urgent attention.

Dry macular degeneration has no proven treatment to reverse it, though certain vitamins and minerals may slow progression in some people. Wet macular degeneration, by contrast, has several treatments that can stop the leaking and sometimes restore some vision if caught early. This is why any sudden change in your vision—blurriness, wavy lines, or a dark spot in the center—warrants an eye exam within days, not weeks.

Anti-VEGF injections: how the main treatment works

Anti-VEGF medications are injected directly into the eye to block the protein that triggers abnormal blood vessel growth. The most commonly used medications are bevacizumab (Avastin), ranibizumab (Lucentis), aflibercept (Eylea), and brolucizumab (Beovu). These drugs work by binding to VEGF molecules and preventing them from signaling the eye to grow new vessels. Without that signal, the abnormal vessels stop growing, stop leaking, and may shrink over time.

The injection is given in your ophthalmologist's office under local anesthesia. The eye is numbed with drops, and the needle enters through the white part of the eye (the sclera), not through the pupil, so you do not see the needle. The procedure takes a few minutes. Most people need injections every four to eight weeks at first, though the interval may lengthen if the condition stabilizes. Treatment often continues for months or years, and some people need ongoing injections to keep the vessels from leaking again.

Anti-VEGF treatment works best when started early, before significant scarring has occurred. Studies show that people treated within weeks of symptoms developing preserve more vision than those who wait months. If the macula has already been scarred by prolonged leaking, the damage is usually permanent, which is why prompt diagnosis and treatment are so important.

Other treatments when anti-VEGF is not enough

Some people do not respond well to anti-VEGF alone, or their condition worsens despite treatment. In these cases, ophthalmologists may combine anti-VEGF with other approaches. Photodynamic therapy (PDT) uses a light-activated drug injected into the bloodstream; a laser then activates the drug in the abnormal blood vessels, causing them to close off. PDT is less commonly used now than it was before anti-VEGF became available, but it may be considered for certain types of wet macular degeneration.

Laser photocoagulation uses a focused laser beam to destroy the abnormal blood vessels directly. This approach can damage surrounding healthy tissue, so it is used selectively and is less common than anti-VEGF treatment. Some people receive a combination of treatments tailored to the specific pattern of their blood vessel growth and leaking.

Symptoms that signal wet macular degeneration needs urgent attention

The hallmark symptom of wet macular degeneration is a sudden change in your central vision. You might notice straight lines appearing wavy or bent—a doorframe or the edge of a building looks crooked. A dark or blank spot may appear in the center of your vision, or colors may seem less bright or distorted. Some people describe it as looking through water or seeing a smudge in the middle of their vision that will not go away.

These symptoms can develop over days to weeks, which is very different from the gradual changes of dry macular degeneration. If you notice any of these changes, contact your eye doctor or visit an urgent care eye clinic the same day if possible. The faster you get diagnosed and treated, the better your chances of preserving vision. Do not wait to see if it improves on its own—wet macular degeneration does not improve without treatment.

What happens to vision after treatment begins

In the best-case scenario, anti-VEGF treatment stops the leaking within days to weeks, the fluid under the macula is reabsorbed, and the macula returns to a flatter shape. Vision may improve noticeably, though not always to what it was before the condition started. Some people regain most of their lost vision; others see modest improvement. The variation depends on how much damage occurred before treatment started and how well the individual responds to the medication.

Even after the leaking stops, the macula may not return to perfect health. Scarring or thinning of the retinal tissue can persist, which limits how much vision recovers. This is why early treatment matters so much—if you start before scarring develops, you have a much better chance of preserving functional vision. After the initial phase of treatment, many people move to a maintenance schedule with injections spaced further apart, sometimes every two to three months or longer, depending on how stable the condition becomes.

Frequently Asked Questions

Can wet macular degeneration cause complete blindness?

Wet macular degeneration damages central vision, not peripheral vision, so complete blindness is rare. However, if left untreated, it can cause severe central vision loss that makes reading, recognizing faces, and driving impossible. Peripheral vision usually remains intact, which is why people with advanced macular degeneration can still navigate and move around, though they cannot see fine details.

How often do I need anti-VEGF injections?

The frequency varies by person and by which medication is used. Most people start with injections every four weeks, but some medications are approved for longer intervals. After the condition stabilizes, injections may be spaced to every eight to twelve weeks or longer. Your ophthalmologist will monitor your eye with imaging and adjust the schedule based on whether leaking is still occurring.

Is wet macular degeneration hereditary?

Age-related macular degeneration, including the wet form, does run in families, so having a parent or sibling with the condition increases your risk. However, genetics is only part of the picture—smoking, high blood pressure, obesity, and sun exposure also increase risk. If you have a family history, regular eye exams become even more important.

What if I cannot afford anti-VEGF injections?

Anti-VEGF medications are expensive, but most insurance plans, including Medicare, cover them for wet macular degeneration. If you are uninsured or underinsured, ask your ophthalmologist about patient assistance programs run by the drug manufacturers, which can reduce or eliminate your out-of-pocket cost. Some community health centers also offer discounted eye care.

Can I prevent wet macular degeneration if I have dry macular degeneration?

Not all dry macular degeneration progresses to wet, but some people do develop the wet form over time. You cannot prevent it entirely, but you can reduce your risk by not smoking, controlling blood pressure and cholesterol, eating a diet rich in leafy greens and fish, protecting your eyes from sun damage, and having regular eye exams. Early detection of any change is your best protection.