Early signs of macular degeneration, and when to see an eye doctor

Age-related macular degeneration often starts quietly. In its early stage, the condition frequently causes no symptoms at all, and a person can carry it for years with vision that seems normal. When changes do appear, they tend to be small: a bit of haze while reading, a door frame that looks slightly crooked, a need for a brighter lamp. Many people put these down to getting older and move on.

That habit can delay care. The National Eye Institute identifies AMD $AMD as a leading cause of vision loss among adults age 50 and up in the U.S. The disease targets the macula, a small area at the center of the retina responsible for the sharp detail people rely on when they look straight at something. Peripheral vision usually survives. As a result, AMD seldom leads to complete blindness. The damage falls in the middle of the visual field instead, the part used for reading, driving and recognizing faces.

AMD comes in two forms. Dry AMD is the more common type and moves slowly. Wet AMD, sometimes called neovascular AMD, develops when abnormal blood vessels form beneath the retina and leak fluid or blood. It occurs less often, but it can cause severe central vision loss quickly. A dry case can also convert to the wet form. A dry AMD diagnosis therefore still calls for ongoing monitoring.

Knowing the early signs of macular degeneration gives people a way to tell an ordinary visit from an urgent one. Some signs are things a person notices, such as blur, distortion or a gap in the center of what they see. Others show up only in an eye doctor's chair, during a dilated exam or a retinal scan. A few checks can happen at home between appointments.

The 10 slides that follow cover a selection of these signs and steps, not every possible symptom. They describe what each change looks like, why it happens and what it means for timing. They also cover who faces higher risk and how often to book an exam. None of them replaces a professional diagnosis. Several of these changes overlap with other eye conditions, and only an exam can sort them out.

Illustration: Quartz

A soft, hazy patch in the middle of whatever you look at can be a sign of age-related macular degeneration (AMD $AMD). The edges of your sight may stay fairly sharp, and a new eyeglass prescription does not fully clear the blur.

The reason lies in where the damage happens. The macula is a small area at the center of the retina, the light-sensitive tissue lining the back of the eye. It handles the fine, straight-ahead detail needed to thread a needle or read the time on a wall clock. When AMD damages the macula, the central part of the image loses its crispness.

Glasses and contact lenses solve a different problem. Nearsightedness, farsightedness and astigmatism occur when the cornea and lens bend incoming light so that it lands slightly off target. A corrective lens shifts that light back into place. AMD involves the retina itself. Even perfectly focused light then falls on tissue that can no longer render detail clearly. A camera offers a rough comparison. Cleaning or swapping the lens will not fix a worn-out sensor.

In daily life, the blur tends to sit exactly where attention goes. A street sign straight ahead can look fuzzy even though parked cars to either side are easy to make out. A coffee mug in the middle of a table may look smeared while the plates around it stay crisp.

The change can begin in one eye. When that happens, the other eye can compensate, and the blur may go unnoticed until the stronger eye is covered by chance.

Cataracts can also make vision look cloudy. A cataract clouds the eye's natural lens and is treated with surgery. Its haze tends to spread across the whole view rather than gathering in the center. The two conditions can occur together. Only an eye exam can show which one is behind the blur.

Anyone whose updated glasses still leave the middle of their vision soft should mention it to an eye doctor and ask whether a dilated exam is needed.

Illustration: Quartz

Straight lines that look wavy, bent or warped can be an early sign of macular degeneration. Eye doctors call this distortion metamorphopsia. It is one of the classic symptoms of age-related macular degeneration, or AMD $AMD.

The effect is easiest to see on objects a person already knows are straight. The edge of a door frame may seem to bow in the middle. A line of printed text can look as if it ripples across the page. The grout between bathroom tiles may appear to kink or sag in one part of the pattern while the rest looks normal.

The distortion starts in the macula. This patch of retina sits at the back of the eye and supplies the sharp vision used to look directly at something. The light-sensing cells there sit in a tightly ordered layer. When something pushes that layer out of shape, the cells no longer line up the way the brain expects. The picture the brain builds from them comes out bent to match.

With AMD, that push often comes from fluid. In wet AMD, also called neovascular AMD, abnormal blood vessels form beneath the retina and seep fluid or blood into nearby tissue. That buildup can lift and wrinkle the macula. Metamorphopsia is linked especially closely to this process. Because wet AMD can cause rapid loss of central vision, new distortion is a warning sign worth acting on.

The bent area tends to stay in the same spot within a person's field of view. It travels with the gaze, so whatever sits directly in the center of sight is the thing that looks warped.

Distortion is easy to overlook because the two eyes work as a team. If only one eye is affected, the healthier eye can hide the problem during ordinary activities. Some people notice it for the first time only when they happen to close or cover one eye.

Any new waviness in straight lines is a reason to contact an eye doctor rather than wait for a routine appointment. Distortion has possible causes other than AMD. Only an eye exam can identify which one is responsible.

Illustration: Quartz

A gray, dark or blank patch right where you are looking can mean age-related macular degeneration is damaging the macula. Eye doctors call this a central scotoma, and it tends to grow larger as the disease advances.

The patch sits at the exact point a person is focusing on. It travels with the eyes wherever they move. Shift your gaze to a clock on the wall, and the spot lands on the clock face. Look at a doorway, and it covers the middle of the door. The area around the edges of the patch usually looks normal.

Not every scotoma looks like a solid black hole. Some people describe a smudge or a gray haze. Others see a gap where part of an object seems to vanish. Some notice only that a small detail disappears when they look straight at it. The brain fills in missing information using the surrounding image. A small spot can therefore go unnoticed for a long time.

The other eye can hide it too. With both eyes open, a healthy eye covers for a damaged one. A gap in one eye may only become obvious when that eye is tested on its own.

In the dry form of AMD $AMD, a blank area often traces back to geographic atrophy. This advanced stage involves patches where retinal tissue gradually wastes away. The light-sensing cells in those patches stop working. The matching section of central vision goes blank. The atrophic areas can expand over time, and the missing part of the visual field grows with them.

Size and speed both matter to an eye doctor. A spot that appears suddenly or gets bigger over a few days calls for a prompt appointment rather than a wait for the next routine visit. A slower change is still worth reporting. It gives a specialist a record of how the disease is moving.

People who live with a central blank area often learn to look slightly off to one side. That shift lets a healthier part of the retina pick up the image. Low-vision specialists teach this technique. They also recommend magnifiers and other aids that make daily tasks more manageable.

Illustration: Quartz

Difficulty reading text or identifying familiar faces can be an early sign of age-related macular degeneration, or AMD $AMD. Both tasks rely on the macula, the part of the retina that resolves fine, straight-ahead detail.

Reading asks a lot of central vision. The eye has to land on each word and pick out the small strokes, gaps and curves that separate one letter from the next. When the macula starts to fail, that detail breaks down. Some people notice letters vanishing from the middle of a word. Others see characters blur into one another, and a line of print becomes hard to follow.

Small type can turn into a struggle while larger print still reads clearly. A medicine label, a restaurant menu or the fine print on a bill may take more effort than a newspaper headline. People may reread sentences, lose their place on the page or hold material at an angle in search of a clearer view.

Faces create a related problem. Telling one person from another depends on subtle features around the eyes, nose and mouth. Those details sit right where central vision does its work. A person with AMD may look at a friend across a table and see a blurred face. The wall, the window and the room around that friend can still look sharp.

That mismatch follows from where the damage lands. AMD works on the middle of the visual field and tends to spare the edges. A person can still walk through a room or catch movement off to one side. Meanwhile, the face or page they look at directly loses definition.

Driving draws on the same central detail. Reading road signs, checking a dashboard and judging what lies ahead all require clear straight-ahead sight. Anyone who finds these tasks harder should raise it with an eye doctor instead of guessing at the cause.

Trouble reading or recognizing people has many possible explanations. Only an eye exam can identify which one applies. Describing the specific difficulty — which letters disappear, or whose faces look unclear and from how far away — gives an eye doctor useful information to start with.

Illustration: Quartz

Reaching for more light to read may point to early age-related macular degeneration (AMD $AMD). The same goes for a slow return of sight after stepping from a bright space into a dim one. Both changes are easy to mistake for ordinary aging. They are still worth raising with an eye doctor.

The first change often shows up at home. A person may pull a lamp closer to the page or swap in a brighter bulb. Some carry a book or a menu over to a window. Tasks that once felt easy under ordinary room lighting start to feel like work.

The second change involves dark adaptation. This is the process that lets the eyes recover sight after the lighting drops. Stepping from a sunlit sidewalk into a restaurant, a movie theater or a dim hallway can leave someone with AMD waiting longer than expected before shapes and details return.

Both changes trace back to the retina, the light-sensitive tissue that lines the back of the eye. The macula sits at the center of the retina and handles sharp, straight-ahead vision. When AMD affects that area, the retina can have trouble forming a clear image in low light. It may also respond more slowly when light levels shift.

Neither symptom points to AMD on its own. Plenty of adults need more light for fine print as they age. Other eye conditions can also make dim settings harder to manage. That overlap is part of the difficulty. Because the changes feel ordinary, many people quietly adjust their habits instead of mentioning them.

An eye doctor can work out the cause. A person cannot see their own macula, but an eye doctor can examine it directly. Describing the lighting changes, even ones that seem minor, gives the doctor useful context.

Slow adjustment to darkness also has practical effects. A dark parking garage, an unlit stairwell or a bedroom at night can become harder to move through safely.

Anyone who notices a steady need for brighter light can bring it up at an eye appointment. Mention it, too, if dim rooms take longer to adjust to than before.

Illustration: Quartz

Colors that look duller or less saturated than they used to can be a symptom of age-related macular degeneration. This is a less specific warning than warped lines or a blank central patch. That makes it a reason to book an eye exam, not a reason to reach a conclusion at home.

The explanation starts with the eye's anatomy. At the center of the macula sits the fovea, a tiny pit packed tightly with cone cells. Cones are the photoreceptors responsible for color and fine detail. When AMD $AMD harms tissue in and around the macula, those cells can stop working normally. The colors a person sees straight ahead may then lose some of their richness.

The change can be hard to put into words. A red sweater might look closer to rust or brown. A blue sky might seem grayer than expected. Two shirts that once looked clearly different in shade may become harder to tell apart. Navy and black socks can start to look like a pair.

The shift often arrives slowly. It rarely registers as a single moment. Some people only notice it when one eye sees a color differently from the other. Others hear about it first from a family member who points out a mismatched outfit.

Faded color is not unique to AMD. Several other eye conditions can also make the world look less vivid. That overlap is why this symptom carries less weight on its own than distortion does.

The pattern of other changes around it can help an eye doctor sort out the cause. Glaucoma, for example, harms the optic nerve, and its effects typically show up at the edges of sight before the center. AMD works the other way. It targets the middle of the visual field and tends to leave peripheral vision intact. An eye doctor weighs duller color alongside any blur or distortion straight ahead when judging whether the macula is involved. A complete eye exam is the only way to separate these conditions.

A gradual fading of color is worth raising at the next scheduled eye appointment. A change that appears quickly needs faster attention. The same goes for faded color that arrives with other new problems in central vision. Either one deserves a call to an eye doctor without waiting for a routine visit.

Illustration: Quartz

Drusen are small yellow deposits that build up under the retina. An eye doctor can spot them during a dilated exam, but the person who has them cannot see or feel them. They are a hallmark finding in age-related macular degeneration, or AMD $AMD.

That makes drusen different from the changes people notice on their own, such as a blurred patch or a bent line. A person with drusen may read, drive and recognize faces with no trouble at all. Nothing in daily life hints that the deposits are there.

A dilated exam is how they come to light. Drops widen the pupil, which gives an optometrist or ophthalmologist a broader view of the back of the eye. That view takes in the retina and the macula, the small central area that handles sharp, straight-ahead vision. Against the surrounding tissue, drusen show up as yellowish flecks.

The size of the deposits matters. Larger drusen are linked to a higher risk that AMD will progress to a more advanced stage. That link shapes follow-up care. A doctor who sees large deposits has a reason to watch the eye more closely over time.

Optical coherence tomography, or OCT, adds more detail. The scan produces detailed cross-section images of the retina, showing its individual layers one above the other. Those images help a doctor see where deposits sit in relation to the surrounding tissue. Repeat scans at later visits make it possible to compare the retina over time.

Timing is the practical issue. Drusen give no warning. A person who waits for blurry or distorted vision before booking an exam may already be past the point at which the deposits could first have been found. An exam at that earlier stage gives patient and doctor a record to measure later changes against.

A finding of drusen is not a diagnosis of vision loss. It marks the start of monitoring. What comes next depends on what the dilated exam and any imaging show.

Illustration: Quartz

An Amsler grid is a square chart of evenly spaced straight lines with a single dot at its center. It checks one eye at a time for changes in central vision. It is a tool for keeping watch between appointments, not a way to diagnose macular degeneration.

The design is deliberately plain. Every line on the chart is straight, and every square is the same size. Against that uniform pattern, small distortions in the middle of the visual field tend to stand out.

Setup takes only a moment. Anyone who normally wears reading glasses should put them on first. The aim is to judge the retina, not the eye's ability to focus up close. Then hold the grid at the distance you would usually hold a book or a phone.

Next, cover one eye with a hand or a card. With the uncovered eye, look straight at the center dot and keep your gaze fixed there. The point is not to scan the page. While you stay locked on the dot, notice how the rest of the grid looks around it.

Repeat the same steps with the other eye. Testing each eye separately matters. The brain blends the images from both eyes, and a healthy eye can mask a problem in its partner. As a result, a change may go unnoticed when both eyes are open.

Several results count as warning signs. Lines may look curved, rippled or pulled out of shape. Part of the grid may seem to be missing, faded or covered by a gray or dark patch. Some areas may look blurry. Any of these is a reason to contact an eye doctor rather than wait for a routine visit.

Keep the conditions the same each time. Use the same lighting, the same distance and the same glasses. That consistency makes it easier to tell a real change in vision from a difference in setup. An eye doctor can advise on how often a particular patient should check.

A normal-looking grid does not rule out disease. Macular degeneration can be present without any visible distortion on the chart. Some retinal changes can be seen only by an eye doctor during an exam. The grid supplements professional care. It does not replace it.

Illustration: Quartz

A sudden change in central vision calls for an eye exam within a day or two. Straight lines that bend, a new dark spot in the middle of sight or a fast drop in sharpness can all point to wet age-related macular degeneration (AMD $AMD). In that form, prompt treatment matters.

Wet AMD, also called neovascular AMD, involves abnormal blood vessels that grow under the retina. These vessels can leak fluid or blood into the macula, the small area that handles sharp, straight-ahead vision. Once that happens, central sight can worsen within a short span.

The warning signs often arrive abruptly. A person may notice one morning that the edge of a bookshelf looks warped, or that a gray smudge now sits over the center of a clock face. A change in one eye can go unnoticed for a while. The other eye often compensates for it. That makes the first days of a problem easy to miss.

The right response is to call an eye doctor's office the same day. Describe what changed, which eye is affected and when it started, then ask to be seen within a day or two. Waiting for a routine appointment months away is too long when central vision shifts quickly.

People already diagnosed with dry AMD should follow the same step. The dry form can progress to the wet form, and a new symptom may be the earliest clue that this has happened.

Wet AMD is treated with anti-VEGF medicines injected into the eye. VEGF stands for vascular endothelial growth factor, a protein that drives the growth of new blood vessels. Drugs such as aflibercept and ranibizumab block that protein, which can slow further vision loss. Results are generally better when treatment starts earlier. That is why the timing of the first visit matters for this form of the disease.

Dry AMD has no cure. In 2023, the U.S. Food and Drug Administration approved two treatments for geographic atrophy, an advanced stage of the dry form. They are pegcetacoplan, sold as Syfovre, and avacincaptad pegol, sold as Izervay. An eye doctor can explain whether either one fits a particular patient's case.

Only an eye doctor examining the retina can confirm whether leaking vessels are behind a sudden change or whether another problem is responsible. That diagnosis comes before any treatment decision.