Wet age-related macular degeneration (wet AMD) causes sudden, noticeable changes to your central vision, including blurred or distorted sight, dark spots, and difficulty recognizing faces. Unlike the more common dry form of AMD, which progresses slowly over years, wet AMD can damage your vision within days or weeks. About 1.49 million Americans have vision-threatening AMD, which includes the wet form, and without treatment, 80% to 90% of people with wet AMD will eventually lose enough vision to meet the criteria for legal blindness.
How Wet AMD Affects Your Eyes
Wet AMD develops when abnormal blood vessels grow underneath the retina, specifically in the macula, the small central area responsible for sharp, detailed vision. These new vessels are fragile. They leak blood and fluid into the macula, causing swelling and scarring that distort or destroy central vision. The underlying trigger is a protein called vascular endothelial growth factor (VEGF), which signals the body to build new blood vessels. In wet AMD, VEGF activity goes into overdrive, and the vessels it produces are structurally weak and prone to rupture.
This process can happen even if you already have dry AMD. Dry AMD involves a gradual thinning of macular cells and a buildup of tiny deposits called drusen. It doesn’t always convert to the wet form, but when it does, the shift can happen at different rates in each eye.
The Most Common Symptoms
The hallmark symptom of wet AMD is visual distortion, known clinically as metamorphopsia. Straight lines, like door frames or window blinds, appear wavy, bent, or crooked. Objects may look larger or smaller than they actually are, or seem closer or farther away than expected. Some people describe it as looking through a pair of glasses with the wrong prescription. The distortion can affect a small part of your visual field or a larger area, but it’s almost always worst in the center because the macula handles your fine-detail and color vision.
Other symptoms that typically appear early include:
- Blurred central vision that doesn’t improve with glasses
- A dark or blank spot near the center of your visual field
- Difficulty recognizing familiar faces
- Trouble adapting to low light, such as moving from a bright room to a dimly lit one
- Colors appearing faded or washed out
These symptoms can appear suddenly, sometimes over just a few days. That speed is what separates wet AMD from the dry form, where changes creep in over months or years. Peripheral (side) vision usually remains intact even as central vision deteriorates, which is why people with wet AMD can often still navigate a room but struggle to read, drive, or see fine details.
How Wet AMD Symptoms Differ From Dry AMD
Dry AMD tends to announce itself slowly. You might notice that reading takes more effort, or that you need brighter light for tasks you used to handle easily. Central vision dims gradually, and many people don’t realize anything is wrong until the condition is fairly advanced.
Wet AMD, by contrast, tends to arrive with a more dramatic shift. The fluid and blood leaking from those abnormal vessels cause rapid swelling in the macula, so the visual distortion and blurriness can seem to appear out of nowhere. If you’ve been diagnosed with dry AMD and suddenly notice wavy lines or a new dark spot in your vision, that change could signal a conversion to the wet form and warrants immediate attention.
Monitoring Your Vision at Home
An Amsler grid is a simple tool that helps you catch changes early. It’s a square grid of evenly spaced lines with a dot in the center, and the American Academy of Ophthalmology recommends using one daily if you have any form of AMD. The process takes about 30 seconds per eye.
Wearing your normal reading glasses, hold the grid 12 to 15 inches from your face in good light. Cover one eye and focus on the center dot with the other. Without moving your gaze from that dot, notice whether any of the surrounding lines look wavy, blurry, dark, or blank. Repeat with the other eye. If any area of the grid looks distorted or different from the last time you checked, that’s a sign something has changed in your macula and you should contact your eye doctor right away.
How Wet AMD Is Detected
When you describe symptoms like wavy vision or a new blind spot, your eye doctor will look for the telltale signs of fluid and bleeding in the macula. The primary tool is a high-resolution retinal scan called optical coherence tomography, or OCT. This painless imaging test creates a cross-section view of your retina, revealing swelling, pockets of fluid trapped between retinal layers, blood pooling beneath the surface, and detachment of the tissue layer under the retina. Active abnormal blood vessel growth causes small fluid-filled detachments and swelling that are clearly visible on these scans, often before you notice significant vision changes yourself.
Treatment and What to Expect
The standard treatment for wet AMD is a series of injections into the eye that block VEGF, the protein driving abnormal vessel growth. The idea is straightforward: cut off the signal that tells those leaky vessels to form, and the fluid and bleeding slow down or stop. The eye is numbed beforehand, and most people report feeling pressure rather than sharp pain during the procedure.
Treatment typically starts with three monthly injections, called a loading phase. After that, your doctor will assess how your eye is responding and adjust the schedule. Many patients move to a “treat and extend” approach, where the interval between injections is gradually lengthened as long as the macula stays stable. Newer medications can stretch the gap between visits to three or even four months for some patients. If signs of disease activity return, such as new fluid on a scan or a drop in visual sharpness, the interval gets shortened again until things stabilize.
Treatment doesn’t cure wet AMD, but it can preserve the vision you have and, in many cases, recover some of what was lost. The key factor is timing. Starting treatment early, before significant scarring forms, gives you the best chance of maintaining useful central vision long-term.
Risk Factors Worth Knowing
Age is the biggest risk factor. Wet AMD overwhelmingly affects people over 50, and risk climbs with each decade. Beyond age, smoking is the most significant modifiable risk. People who smoke are substantially more likely to develop macular degeneration than nonsmokers, and regular exposure to secondhand smoke also raises risk. The disease runs in families as well. Researchers have identified several genes linked to AMD, so if a parent or sibling has been diagnosed, your own risk is higher. Other contributing factors include high blood pressure, obesity, and a diet low in leafy greens and fish.