Age-related macular degeneration (AMD) is a leading cause of vision loss for older adults, and 11 million people in the United States have it, according to the National Eye Institute (NEI). People age 55 and older are more likely to develop it.
The problem is that early AMD produces no symptoms at all. Most people notice something is wrong only after the disease has already damaged the central vision they rely on for reading, driving and recognizing faces.
That makes the specific warning signs worth knowing. Below are seven changes the NEI and the American Academy of Ophthalmology (AAO) flag, plus a 30-second self-check you can do at home.
Seven signs to watch for
1. Straight lines look wavy or crooked. Door frames, lamp posts or a printed page may appear bent or broken. The NEI calls this a late-AMD warning sign that warrants a same-day call to an eye doctor.
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2. A blurry patch near the center of your vision. A soft, smudged area in the middle of what you are looking at, while your side vision stays clear, is a hallmark of intermediate and late AMD.
3. Blank or empty spots. As the disease advances, the blurred area may grow, and parts of your central vision can drop out entirely.
4. Colors look less bright. Faded or washed-out color perception is another late-stage sign flagged by the NEI.
5. Trouble seeing in low light. Dim restaurants, stairwells at dusk or a candle-lit room may suddenly feel much harder to navigate. The NEI lists this among the symptoms of intermediate AMD.
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6. Needing more light to read. You may find you need brighter lamps for reading, cooking or close-up work than you used to, according to the BrightFocus Foundation, a nonprofit that funds macular research.
7. One eye sees differently from the other. AMD often develops in one eye first, and the healthy eye can mask the problem for months. Covering each eye in turn is the simplest way to spot the gap.
The 30-second Amsler grid test
The AAO recommends a daily home check using an Amsler grid, a square of straight lines with a dot in the middle. Wearing your reading glasses, hold the grid 12 to 15 inches from your face in good light. Cover one eye and stare at the central dot.
Then check, in your side vision, whether any lines appear wavy, blurry, dark or blank. Repeat with the other eye. If anything looks off, the AAO says to contact an ophthalmologist right away. "Doing this simple at-home eye test once a day, every day can help save your vision," the AAO writes.
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When to call the doctor immediately
The NEI is unambiguous about the threshold. If straight lines suddenly look wavy, see your eye doctor right away. A new central blur, a new blank spot or a rapid change in color perception also deserves urgent attention, especially after age 55 or with a family history of AMD.
Anyone concerned about vision changes should talk to an eye doctor. AMD has no cure, but treatments for the wet form and lifestyle steps can slow progression, particularly when the disease is caught early.
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This article is made and published by Jesper Bengtson, who may have used AI in the preparation.